Toshiba TCD2564DG Colour CCD Image Sensor: Three-Line RGB Scanning, Document Imaging and OEM Buying Guide

High-quality document scanning requires much more than the ability to convert light into an electrical signal. A scanner must reproduce fine printed characters, coloured graphics, photographic content and subtle tonal differences while maintaining accurate geometry across the entire document. For original equipment manufacturers developing document scanners, photocopiers and specialized colour imaging instruments, the semiconductor detector plays an important role in determining how optical information is acquired and subsequently reconstructed. Toshiba TCD2564DG is a three-line RGB CCD linear image sensor developed for colour document imaging, offering 5,400 sensing elements per colour line, high-sensitivity photodiodes and an architecture designed around controlled optical scanning. Its specifications are particularly relevant to equipment manufacturers developing A4 scanning systems that require consistent colour reproduction, fine spatial sampling and dependable integration with dedicated scanner electronics.

The semiconductor uses separate red, green and blue sensing arrays to acquire colour information across a document as the document or scanning optics move relative to the detector. Unlike an area image sensor that records a complete two-dimensional scene through a single exposure, this type of CCD builds an image from successive line acquisitions. The method is well suited to document scanning because the relationship between the optical assembly and the document can be controlled precisely. Toshiba identifies the device as a lens-reduction-type colour sensor and specifies 5,400 effective sensing elements in each of its three lines, giving the system a defined arrangement for acquiring detailed colour measurements across the width of an A4 page. This architecture supports the reconstruction of high-resolution document images, although the accuracy of the finished scan still depends on lens performance, movement control, electronic timing and image-processing calibration.

For manufacturers evaluating a colour CCD image sensor, Toshiba TCD2564DG illustrates why the intended application should determine the semiconductor choice. Its 5,400-element architecture is designed around document imaging and colour scanning requirements rather than simply maximizing the speed of industrial object sorting. A manufacturer producing an office document scanner may prioritize fine line sampling, accurate reproduction of coloured details and consistent illumination over the acquisition characteristics required by a machine examining falling products at very high speed. Although both types of equipment may use RGB linear CCD technology, their optimal sensing geometry, readout arrangements and mechanical integration can differ substantially. A correct purchasing decision therefore requires an understanding of the specific technical characteristics that make this device appropriate for the equipment being developed.

Toshiba specifies 7 µm by 7 µm sensing elements arranged at a 7 µm pitch and describes the product as suitable for scanning A4 documents at approximately 24 lines per millimetre, corresponding to a nominal resolution of about 600 dpi. These figures provide a technical foundation for selecting the optical magnification and mechanical scanning method, but they do not independently guarantee that every completed scanner produces a high-quality 600 dpi image. The optical system must resolve sufficiently fine detail, the document must move accurately relative to the image sensor, and the readout electronics must preserve useful tonal and colour information. In a practical document scanner, resolution, signal quality and movement accuracy are interdependent, and weaknesses in any one of these areas can reduce the quality of the digitized output.

The three-line architecture also introduces specific colour-registration considerations. The red, green and blue photodiode arrays occupy separate physical positions, meaning that the same printed feature reaches the corresponding sensing lines at different points during the scan. Toshiba specifies approximately 28 µm separation between adjacent colour arrays, and the electronic reconstruction process must account for this geometry and the movement of the document. If the scanner does not associate the colour measurements correctly, fine text and graphic boundaries may show visible colour displacement. These effects can become particularly noticeable around narrow printed lines, sharp edges and high-contrast details. The engineering team must therefore integrate accurate movement control with suitable line-delay compensation and colour-processing arrangements.

The electrical and mechanical characteristics of Toshiba TCD2564DG are equally important to OEM development. The device uses a two-phase 5 V clocking arrangement with a typical 10 V power supply, and Toshiba identifies an internal clamp circuit intended to reduce some external signal-conditioning requirements. The semiconductor is supplied in a 22-pin ceramic dual-inline package intended for through-hole mounting. These features distinguish it from CMOS image sensors and from CCD products with different electronic drive arrangements. The camera or scanner PCB must be designed specifically around the required supply, timing and output characteristics, while the optical assembly must maintain appropriate alignment with the active sensing lines. A device with a similar nominal resolution cannot automatically replace Toshiba TCD2564DG if the package, electrical interface or colour geometry differs.

Kyptec Automation® provides a dedicated Image Sensor sourcing offering covering Toshiba, Hamamatsu and ON Semiconductor devices for industrial, scientific and OEM imaging requirements. Its published category invites buyers to identify their manufacturer, exact part number and required quantity, creating a straightforward enquiry route for manufacturers seeking a defined semiconductor component. This is relevant to equipment developers using Toshiba TCD2564DG because the device's precise electrical and optical characteristics become part of the approved scanner design. Purchasing the correct manufacturer component is therefore essential to maintaining consistency between engineering qualification and repeated production. This guide examines the technical architecture, A4 document-scanning applications and OEM purchasing considerations associated with Toshiba TCD2564DG, with particular attention to information that helps camera manufacturers and procurement teams make accurate component decisions.

Toshiba TCD2564DG RGB CCD Architecture, Optical Resolution and Document Scanner Electronics

Toshiba TCD2564DG contains three linear arrays of 5,400 photosensitive elements, with individual rows associated with red, green and blue light. Each sensing element converts the light reaching its photodiode into charge during the relevant integration interval, after which the CCD architecture transfers the collected information through the appropriate readout arrangement. This produces successive lines of colour-related measurements that can be combined to construct the digitized image of a document. The device is not a conventional 16,200-pixel area sensor, even though the three sensing lines collectively contain 16,200 colour-channel elements. Its spatial resolution across the page is based on 5,400 sample positions per colour line, while image information along the other document dimension is acquired through repeated scanning movement. Understanding this distinction helps OEM engineers select the appropriate acquisition electronics and prevents incorrect assumptions about the detector's imaging format.

The 7 µm pixel pitch produces an active sensing-row length of approximately 37.8 mm, calculated from 5,400 sensing elements multiplied by 0.007 mm. This physical dimension must be matched with a lens-reduction optical system that projects the document width onto the detector. For an A4 document measuring approximately 210 mm across its shorter dimension, the optical arrangement requires a reduction ratio of roughly 5.56 to project the full width onto the 37.8 mm sensing line. The exact design must account for the intended scan margins, usable sensing elements, mechanical construction and manufacturer reference dimensions, but the calculation demonstrates how detector length directly influences the optical system. For companies evaluating linear CCD image sensors for document equipment, active sensing length is therefore as important as the nominal number of elements. A lens that does not cover the complete row with adequate sharpness can compromise image quality even when the sensor provides sufficient electronic resolution.

The device's relationship to approximately 600 dpi scanning follows from its physical sampling capability across the intended A4 width. Dividing 5,400 elements by 210 mm gives approximately 25.7 samples per millimetre before allowing for practical design margins, while Toshiba describes the device's A4 imaging capability in terms of 24 lines per millimetre. This level of sampling is consistent with the requirements of many detailed document-scanning tasks, including reproduction of fine printed characters and graphics. However, the true optical resolution of a scanner is not determined by sensor element count alone. Lens modulation performance, focus quality, illumination uniformity and mechanical movement all affect the amount of document detail that can be represented accurately. Image-processing algorithms may sharpen an acquired image or enlarge its pixel dimensions, but they cannot fully recover fine features that were not resolved during optical acquisition.

The separation between the RGB sensing arrays is a particularly important design parameter. Toshiba specifies approximately 28 µm between adjacent photodiode arrays, corresponding to four element pitches. Because the document or scanning assembly moves during acquisition, the red, green and blue lines observe the same region at different moments. The scanner must compensate for these differences by associating the appropriate line measurements with the correct document position. The required compensation depends on the sensor geometry, optical reduction and physical scanning movement. A correctly implemented registration method allows coloured details to align in the reconstructed image, while incorrect line association can create red, green or blue fringes around black printed text. Such artifacts may be especially visible when scanning fine fonts, technical drawings, signatures or sharply bounded graphic elements, making registration accuracy an essential part of engineering qualification.

A further consideration is the difference in sensitivity between colour channels. Toshiba publishes typical sensitivity values of 9.6 V/(lx·s) for red, 8.9 V/(lx·s) for green and 3.8 V/(lx·s) for blue under its specified measurement conditions. These differences demonstrate why a three-line RGB sensor does not automatically produce balanced colour information without suitable illumination and processing. The spectral characteristics of the light source, optical transmission and document reflectance also influence the output of each line. A scanner manufacturer should therefore establish a controlled illumination system and use an appropriate calibration process to obtain consistent colour reproduction. Electronic gain and colour corrections can help balance the recorded channels, but they should be applied with consideration for signal noise and the actual information acquired by the detector. A substantial correction applied to a weak channel does not create optical information that was absent during exposure.

Toshiba identifies high-sensitivity, low-dark-current PN photodiodes as a feature of Toshiba TCD2564DG. These characteristics are relevant because document scanners must reproduce tonal variations accurately, including light backgrounds, printed halftones and dark regions. Dark-current behavior can influence the baseline signal, while photodiode sensitivity affects how much useful output is obtained from the available illumination. Nevertheless, performance within the finished scanner depends on exposure timing, operating temperature, electrical noise and optical configuration. A device described as having high sensitivity may still require careful lighting design to maintain appropriate signal levels throughout the page width. The engineering objective is to obtain reproducible measurements across all three colour channels without excessive saturation or loss of detail in darker regions.

The device uses a two-phase 5 V clocking arrangement and a typical 10 V supply, making the electrical interface an important consideration for PCB design. The clock signals control charge transfer and readout according to the manufacturer's specified timing, while the analog output must be received and processed using compatible circuitry. Toshiba also incorporates a clamp circuit, which can reduce certain external signal-conditioning requirements compared with arrangements that require more discrete circuitry. However, the integrated clamp does not eliminate the need for correct clock generation, stable supply rails, suitable grounding and accurate signal acquisition. The engineer should follow the manufacturer datasheet when designing the readout chain because timing errors or unstable electrical conditions can reduce image consistency even when the photodiode arrays themselves operate correctly.

Toshiba's product information specifies a maximum colour data rate of 60 MHz, while its colour linear sensor comparison information lists a maximum line rate of approximately 10.5 kHz for the device. These two figures describe different characteristics and should not be used interchangeably. Data rate refers to the transfer of sampled information through the relevant output arrangement, whereas line rate describes how frequently a complete sensing line can be acquired under the applicable conditions. In an A4 document scanner, the necessary line rate depends on the mechanical scan speed and the required sampling along the page. A fast scanning mechanism may require more frequent acquisition, but electronic capability alone cannot guarantee consistent reproduction if movement control, illumination or output processing are inadequate. OEM developers should therefore calculate the required throughput from the intended pages-per-minute target and verify performance using representative document content.

Mechanical integration further distinguishes Toshiba TCD2564DG from compact surface-mount semiconductor devices. The manufacturer identifies a 22-pin ceramic dual-inline package with through-hole mounting, requiring a compatible PCB footprint and appropriate physical placement within the optical assembly. The active sensing arrays must be aligned accurately with the projected document image, while the supporting structure should preserve the required geometry during normal scanning operation. A small placement or focusing error can affect detail across the document width, especially when the equipment is designed for high-resolution reproduction. The camera or scanner housing must also provide appropriate protection against contamination because dust or particles near the optical path can create persistent defects in scanned images. These requirements should be incorporated into the OEM's mechanical and manufacturing design before the component is approved for production purchasing.

A4 Colour Document Imaging, Photocopier Integration and Specialized Scanning Applications

The primary applications identified by Toshiba for Toshiba TCD2564DG are colour photocopiers and image scanners, particularly equipment designed around A4 documents and approximately 600 dpi imaging. This application focus provides a clear distinction from linear CCD devices developed primarily for rapid colour sorting or extremely wide industrial inspection. In a document scanner, the optical system projects a line of the document onto the sensor while controlled movement allows successive lines to be recorded. The semiconductor's three RGB arrays provide separate colour-channel measurements, and the processing electronics reconstruct them into a digital representation of the page. A successful design must preserve fine printed details, consistent colour and accurate page geometry throughout the scanning process. The manufacturer should therefore establish the intended document width, optical reduction, scan speed and image-quality requirements before finalizing the camera and mechanical arrangement.

Colour document imaging presents several challenges that are less important in purely monochrome barcode reading. Printed documents can contain combinations of black text, coloured diagrams, photographic images, highlighted annotations and low-contrast background details. Each type of content places different demands on the optical system. Fine text requires adequate spatial sharpness and accurate registration, while photographs benefit from stable tonal reproduction and suitable colour processing. Pale printed graphics may become difficult to reproduce if illumination or detector response creates insufficient separation from the paper background. A well-designed scanner must therefore balance the information collected across all three colour channels while maintaining useful signal levels throughout the document. This is why an OEM evaluating a colour image sensor should assess the complete document-reproduction process rather than select a semiconductor based only on nominal pixel count.

A4 scanning also requires precise mechanical movement. In a flatbed scanner, an optical carriage may move relative to a stationary document, while other systems transport the document through a fixed scanning region. Both arrangements must establish a consistent relationship between physical movement and acquired lines. If the mechanism advances unevenly, the reconstructed image may become compressed or stretched along the scan direction, even when the sensor provides accurate measurements across its row. Such errors can affect the geometry of printed characters, diagrams and technical documents. A suitable motor-control or position-feedback arrangement should therefore be incorporated into the equipment design, particularly where the scanner must maintain consistent reproduction across multiple pages. The appropriate line acquisition rate should follow the actual movement profile and intended resolution rather than an arbitrary electronic setting.

Three-line colour registration becomes particularly visible when a scanner processes black text against a white background. Although the text itself may not contain intentional colour, inaccurate alignment between the red, green and blue sensing lines can create coloured edges around individual characters. These artifacts reduce the clarity of scanned documents and may affect downstream document-processing functions such as character recognition. The OEM should therefore calibrate the relative colour-line positions according to the sensor geometry and the actual mechanical scan increment. Registration should also be evaluated across changes in scanning speed and normal equipment tolerances, because small variations can become more noticeable when fine printed details are reproduced at high resolution. The objective is to associate corresponding measurements from the three colour lines with the same physical location on the document so that the reconstructed image maintains accurate boundaries.

Colour consistency is another essential consideration in photocopier and scanner design. Documents may be illuminated by sources with different spectral characteristics, and the sensor's red, green and blue channels respond differently to the available light. The resulting signals require suitable processing to produce a useful digital colour representation. Calibration may involve measuring reference targets, compensating for variation across the sensing width and applying appropriate colour corrections. However, no calibration can compensate completely for severe underexposure, saturation or optical information that the system fails to acquire. The scanner manufacturer should establish illumination intensity and uniformity before relying on electronic corrections, particularly because the detector's published channel sensitivities are not identical.

Document background uniformity can also influence perceived scan quality. An A4 page may appear slightly brighter near one edge because of illumination geometry or lens characteristics, even when the underlying paper is uniform. A document scanner may therefore require shading correction to compensate for the combined optical and electronic response across the detector. The correction should be based on appropriate calibration measurements and should not conceal actual document details or introduce processing artifacts. Optical contamination, misalignment and component variation can change the response of the scanner over time, making practical maintenance and recalibration procedures relevant for equipment intended for repeated use. Toshiba TCD2564DG supplies the underlying RGB information, but the scanner's processing system is responsible for producing a consistent and useful final image.

Some specialized industrial document-handling systems can also benefit from this type of colour linear CCD architecture. Equipment used to digitize printed records, inspect document reproduction or capture colour information from controlled moving sheets may have requirements similar to conventional office scanning. However, an OEM should distinguish these applications from continuous high-speed industrial web inspection, where material speed, inspection width and defect-detection requirements may be very different. Toshiba TCD2564DG should be evaluated on the basis of its actual line-rate capability, active sensing length and colour response rather than assumed suitable for all equipment using the term line scan. A document scanner may operate successfully with controlled page movement and defined illumination, while a factory inspection machine may require another detector designed around different acquisition conditions.

For equipment manufacturers considering a document scanner image sensor, Toshiba TCD2564DG presents a relevant combination of high-resolution RGB acquisition and package characteristics suited to dedicated scanner electronics. Its 5,400 elements per line provide a technical basis for A4 imaging at approximately 600 dpi, while its three-line architecture allows individual colour measurements to be collected across the page. The purchasing decision should nevertheless follow engineering qualification within the actual machine. The lens must reproduce the necessary detail, the optical assembly must maintain alignment and the output electronics must process the colour information correctly. A scanner that meets these requirements can use the semiconductor's capabilities effectively, whereas a poorly aligned or inadequately calibrated design may deliver disappointing images despite employing a technically suitable detector.

Photocopier integration creates additional requirements because the acquired image may be reproduced through a printing process. The scanner must preserve enough detail and colour information for the downstream image-processing and printing stages to generate an acceptable copy. Any distortion, inconsistent colour balance or loss of fine detail during scanning can influence the reproduced result. The OEM should therefore evaluate the detector within the complete imaging workflow rather than only inspect the raw CCD output. Testing should include representative business documents, photographs, coloured charts and fine-line graphics because each reveals different weaknesses in the scanner. The qualification process should determine whether the selected optical geometry, movement speed and electronic processing preserve the information required for the intended document-reproduction quality.

A related consideration is the number of pages the equipment must process within a specified period. Increasing scan speed can raise the required line frequency, reduce the available integration time and place greater demands on the processing system. The manufacturer should calculate whether the device's acquisition characteristics support the target throughput while maintaining suitable image quality. For example, scanning a 297 mm page length at approximately 24 lines per millimetre requires a little over 7,100 longitudinal acquisitions before considering practical margins or transport arrangements. The time needed to collect these lines depends on the operating line rate and the mechanical process. The camera electronics must sustain the output, while the illumination must provide sufficient signal at the chosen acquisition speed. Consequently, pages-per-minute performance should be established through a complete system calculation and confirmed through realistic testing.

Document scanners intended for industrial or institutional environments may also need to operate consistently over extended periods. Continuous use can place demands on motors, optical assemblies, illumination sources and electronic systems. The selected CCD should operate within its specified electrical and environmental conditions, while the finished equipment must protect the optical path from contamination and preserve calibration over time. A change in scanner output should not automatically be attributed to the semiconductor because many surrounding components can influence image quality. The OEM should establish suitable diagnostics and acceptance tests to distinguish optical, mechanical and electronic problems. This approach supports consistent document reproduction and reduces the risk of unnecessary component replacement.

Kyptec Automation® provides a focused Image Sensor sourcing route for OEM manufacturers that have identified Toshiba TCD2564DG as a suitable component for their equipment. Its category includes Toshiba devices among its supported semiconductor technologies and invites customers to submit the exact manufacturer part number and required quantity. This is useful because the colour CCD's package, output arrangement and scanning geometry are closely connected to the approved scanner design. A company seeking replacement or production quantities should therefore communicate the precise device identity rather than request any nominally equivalent RGB sensor. The availability and commercial conditions for the requested part should be confirmed during the sourcing discussion, while technical suitability remains governed by the OEM's own engineering qualification.

Toshiba TCD2564DG OEM Buying Guide, Technical Qualification and Worldwide Component Supply

Purchasing Toshiba TCD2564DG for an OEM scanner involves several considerations beyond the sensor's published image resolution. The semiconductor is a specific manufacturer component with a defined optical architecture, ceramic package and electronic operating arrangement. Once engineering has approved the device, the purchasing department should use the complete manufacturer ordering designation consistently across enquiries, quotations, purchase orders and manufacturing records. This helps prevent confusion with other Toshiba linear CCD products that may have different sensing-element counts, package configurations or readout requirements. A replacement described as a similar colour CCD should not be accepted automatically because compatibility depends on the exact electrical and mechanical characteristics of the camera design. Where a substitute is proposed, engineering should review the full specification and determine whether new qualification testing is required.

For buyers searching for a Toshiba image sensor supplier, Kyptec Automation® provides a dedicated Image Sensor category covering Toshiba alongside Hamamatsu and ON Semiconductor technologies. Its published enquiry process asks for the required make, part number and quantity, allowing equipment manufacturers to communicate a precise semiconductor requirement. This focused approach is valuable for OEM purchasing because a document scanner designed around Toshiba TCD2564DG may depend on its particular 37.8 mm sensing length, three-line RGB arrangement, 22-pin package and operating voltages. The supplier enquiry establishes the commercial requirement, while the OEM engineering team remains responsible for ensuring that the selected component is technically suitable. Actual availability, pricing and delivery terms should be confirmed for the requested quantity rather than assumed from the presence of the component within a manufacturer's online catalogue.

Initial engineering evaluation should be completed before committing to substantial quantities. A prototype scanner should use the intended lens, illumination source, PCB and mechanical scanning arrangement so that the device is assessed under realistic conditions. Tests should examine sharpness across the complete document width, colour registration, channel balance, image uniformity and the effect of movement variations. A scanner may perform well with a simple printed reference target while exposing problems when handling photographs, pale graphics or fine text. The qualification process should therefore include a broad selection of representative documents and should measure whether the equipment achieves its intended output quality at the proposed scan speed. Once the design has been approved, the manufacturer can establish the corresponding purchasing specification and production acceptance procedure.

The device's 22-pin through-hole ceramic package should be considered during assembly planning. The PCB footprint and mechanical alignment must match the manufacturer's package drawing, while assembly processes should follow the relevant handling and soldering guidance. Optical sensors can be sensitive to contamination and mechanical damage, so production procedures should protect the sensing window and maintain suitable placement. The location of the active sensing arrays relative to the camera optics is particularly important for high-resolution document imaging, where small alignment errors can influence image quality across the page. The complete scanner assembly should therefore be inspected and calibrated according to the manufacturer's own quality requirements rather than assume that fitting the correct semiconductor automatically guarantees optical alignment.

Electrical qualification should confirm that the PCB provides the specified two-phase drive signals, typical supply conditions and appropriate output processing. The internal clamp circuit is a relevant design feature, but it does not remove the need for correct signal timing or stable analog acquisition. Differences in electronic noise and channel processing can influence the apparent consistency of scanned colours and backgrounds. The OEM should verify that the selected acquisition hardware supports the intended scan speed and that calibration remains reliable over normal operating conditions. This is particularly important if multiple production batches of the scanner are expected to reproduce documents consistently. Component purchasing and manufacturing records should preserve the approved design configuration so that unexpected changes in performance can be investigated accurately.

For companies evaluating CCD image sensor suppliers for regular production, product lifecycle and current commercial availability should also be reviewed. Toshiba maintains published product information for Toshiba TCD2564DG, including technical documentation, but the existence of a live datasheet does not establish immediate availability for every quantity or ordering arrangement. The buyer should confirm the actual product designation, available supply conditions and relevant manufacturer information before committing to a manufacturing schedule. An established photocopier or document scanner may remain in production for several years, making the semiconductor's continued availability important to component planning. If the approved device becomes difficult to obtain, a proposed replacement should undergo a formal engineering assessment rather than be selected merely because it has a similar resolution.

Production quantities should follow the expected number of scanner assemblies, the quantity of detectors required per unit and any justified service requirements. A manufacturer planning recurring builds may communicate its forecast during sourcing discussions, but a forecast should not be confused with confirmed inventory allocation or a binding delivery commitment. Lead time, order quantity and delivery terms depend on the actual component and transaction. Purchasing too many sensors before a scanner design is stable can create unnecessary inventory exposure, while insufficient planning may interrupt manufacturing. An appropriate purchasing strategy balances the engineering-approved component requirement with realistic production schedules and confirmed commercial information.

International buyers must also consider shipment destination, relevant import requirements and the total cost of obtaining the correct semiconductor. Kyptec Automation® publishes worldwide export enquiry information and provides contact details for buyers seeking its Image Sensor offering. A manufacturer outside India can submit its requirement for Toshiba TCD2564DG together with the quantity and destination for commercial consideration. Applicable transportation arrangements, duties, taxes and other transaction responsibilities should be clarified before the order is finalized. A quoted unit price alone may not represent the complete landed cost, particularly where the shipment must pass through international logistics and receiving procedures before the components can be used in production.

Incoming inspection can provide an additional safeguard for OEM manufacturing. The receiving team should verify that the delivered component identification corresponds to the purchase order and that the packaging and visible condition are consistent with the company's acceptance requirements. Relevant traceability information may be maintained where required by the manufacturer's quality system. Because Toshiba TCD2564DG is an optical semiconductor with a defined mechanical package, suitable storage and handling procedures are important to prevent avoidable damage or contamination before assembly. These controls help maintain a dependable relationship between the component evaluated during engineering and the devices installed in production equipment.

Kyptec Automation® provides a manufacturer-specific Image Sensor sourcing channel that is well suited to defined OEM purchasing enquiries. Buyers can identify Toshiba TCD2564DG directly rather than rely on general descriptions such as colour line scan CCD, 600 dpi sensor or document scanner detector. Its published category covers established CCD and CMOS manufacturers and allows enquiries to be based on exact make, part number and quantity. For equipment developers, this clear purchasing process is useful because it preserves the technical identity of the selected semiconductor while enabling a focused discussion of availability and commercial conditions.

Frequently Asked Questions About Toshiba TCD2564DG Colour CCD Image Sensor

1. How many pixels does Toshiba TCD2564DG have, and why are there three separate lines?

Toshiba TCD2564DG contains 5,400 effective sensing elements in each of three linear arrays, corresponding to red, green and blue colour information. The device therefore contains 16,200 individual colour-channel sensing elements across its three lines, but its spatial sampling across the document is based on 5,400 positions per colour channel rather than a conventional 16,200-pixel area-image resolution. The separate sensing lines allow the scanner to acquire independent colour-related measurements from the illuminated document, which can then be processed into a reconstructed RGB image. Because the lines are physically separated, the same printed feature is observed at different moments as the document or optical carriage moves. The scanner must compensate for this geometry to maintain accurate colour registration. For an OEM, understanding the three-line arrangement is essential because it influences optics, acquisition timing, processing and PCB integration rather than merely changing the total number of detector elements.

2. Why is Toshiba TCD2564DG associated with 600 dpi A4 scanning?

Toshiba designed the device with 5,400 sensing elements per colour line, allowing the optical system to sample an A4 document width at a density consistent with approximately 600 dpi imaging. The manufacturer describes 24 lines per millimetre across A4 paper, which provides a practical indication of the intended spatial sampling. However, the nominal resolution refers to the number of samples acquired and should not be interpreted as a guarantee of complete scanner image quality. The lens must reproduce sufficiently fine detail onto the detector, the illumination must provide appropriate contrast and the scanning mechanism must produce consistent movement along the document. Image processing also influences how colour and tonal information are reconstructed. An OEM should therefore verify actual resolution using suitable test documents and optical measurements instead of relying solely on the semiconductor's nominal element count or the final digital image dimensions.

3. What is the active sensing length of Toshiba TCD2564DG, and how does it affect scanner optics?

Toshiba TCD2564DG has a nominal active sensing-row length of approximately 37.8 mm, calculated from its 5,400 sensing elements arranged at a 7 µm pitch. This length establishes the physical detector width that the optical system must cover while projecting the relevant document region onto the CCD. In an A4 scanner, the lens-reduction arrangement maps approximately 210 mm of document width onto the shorter semiconductor sensing length, requiring suitable optical magnification and adequate image sharpness across the entire active array. If the lens does not provide sufficient coverage or resolution near the ends of the detector, the scan may lose detail despite having an appropriate nominal pixel count. The OEM should also consider lens distortion, mechanical alignment and illumination uniformity because these factors influence the consistency of scanned information across the page. The correct optical design must be validated using representative documents rather than inferred from detector length alone.

4. How does Toshiba TCD2564DG maintain accurate colour alignment when scanning a moving document?

The semiconductor contains separate red, green and blue sensing lines with a physical separation of approximately 28 µm between adjacent arrays. As the document or optical system moves during scanning, each colour line records a particular document feature at a different moment. The scanner's reconstruction process must associate the measurements from the separate lines with the same physical position on the page. This requires appropriate timing and compensation for the scanning movement. If the compensation is incorrect, high-contrast boundaries may show coloured fringes or displaced edges even though the individual detector outputs are functioning correctly. The OEM should therefore calibrate the colour-line relationship using the actual mechanical movement and optical reduction of the finished scanner. Testing should include fine printed text and sharp graphics because these reveal registration problems that may be less obvious when scanning large uniform colour regions.

5. Can Toshiba TCD2564DG reproduce photographs and coloured graphics as well as printed text?

The device's three-line RGB architecture provides a technical basis for acquiring colour information from documents containing photographs, graphics and printed text. However, the quality of the reconstructed image depends on the complete scanner, including illumination, lens sharpness, electronic acquisition and colour processing. Photographic content requires the system to preserve tonal variation and distinguish colours consistently, while fine printed text places greater emphasis on spatial detail and accurate channel registration. Toshiba publishes different typical sensitivities for the red, green and blue channels, meaning that appropriate calibration and illumination are important for producing balanced results. A scanner with inadequate light or excessive electronic noise may reproduce dark regions poorly despite using a colour-sensitive CCD. OEM manufacturers should evaluate representative photographs, coloured charts and text documents under the intended operating conditions before approving the sensor for production equipment.

6. Why are the red, green and blue sensitivity values different for Toshiba TCD2564DG?

The three sensing lines use different colour filters and exhibit distinct responses to the light reaching their photodiodes. Toshiba publishes typical sensitivities of 9.6 V/(lx·s) for red, 8.9 V/(lx·s) for green and 3.8 V/(lx·s) for blue under the specified measurement conditions. These values reflect the detector's characteristics and do not mean that a finished scanner must produce incorrectly balanced colours. The camera electronics and image-processing system can apply appropriate channel corrections based on the illumination and calibration procedure. Nevertheless, amplification of a weaker channel may also influence noise, so the illumination system should provide sufficient useful optical information across all three channels. An OEM should establish the spectral properties of its light source and use appropriate reference measurements to develop stable colour correction. The aim is reliable colour reproduction under the actual scanner configuration rather than making every raw output level numerically identical.

7. What is the difference between the 60 MHz data rate and the 10.5 kHz line rate of Toshiba TCD2564DG?

The data rate and line rate describe different parts of the sensor's operation. Toshiba lists a maximum colour data rate of 60 MHz, which concerns the transfer of image information through the specified output arrangement, while its colour linear sensor information identifies an approximately 10.5 kHz maximum line rate for complete acquisition of sensing-line data. The line-rate value is particularly relevant when estimating how quickly a document can be scanned at a chosen longitudinal sampling density. However, the completed scanner must also coordinate mechanical movement, integration timing, illumination and electronic processing. A semiconductor capable of transferring information rapidly does not guarantee a particular pages-per-minute result because the scanner may be limited by its transport mechanism or by the time required to produce sufficient optical signal. OEM engineers should therefore calculate both the acquisition requirements and the full system throughput before approving an operating speed.

8. Why does Toshiba TCD2564DG require 5 V clocking and a typical 10 V supply?

The device is based on a CCD architecture that uses specified electrical drive conditions for charge transfer and signal readout. Toshiba identifies a two-phase clocking arrangement using 5 V input pulses and a typical 10 V power supply. These requirements distinguish the semiconductor from devices operating exclusively at lower supply voltages or using different electronic interfaces. The OEM's PCB must provide the correct clock signals and supply conditions according to the manufacturer's documentation, while the output stage must be designed for suitable analog acquisition. Applying an incorrect supply or drive waveform can affect operation and potentially damage the semiconductor. The engineer should therefore review recommended operating conditions and absolute maximum limits carefully rather than copy an electronic design developed for another image sensor. Accurate power and timing implementation is an essential part of achieving reliable scanning performance.

9. What is the purpose of the internal clamp circuit in Toshiba TCD2564DG?

Toshiba incorporates a clamp circuit within Toshiba TCD2564DG as part of the sensor's signal-processing architecture. The manufacturer identifies this function as reducing some of the external circuitry that may otherwise be required around the CCD output. For an OEM developing dedicated scanner electronics, this integration can simplify part of the signal-conditioning arrangement, but it does not remove the need for suitable timing, analog processing and stable power. The output must still be acquired according to the specified electrical conditions, and the scanner may require calibration to maintain consistent colour and intensity measurements. Poor PCB layout, incorrect timing or electronic noise can influence image quality even when the semiconductor includes internal signal-support functions. The engineering team should therefore consider the clamp circuit as an integrated feature that contributes to the readout design rather than a substitute for complete camera electronics.

10. Can Toshiba TCD2564DG be used in industrial scanning machines outside conventional office equipment?

The semiconductor may be suitable for specialized industrial scanning equipment where the application requirements align with its sensing geometry, colour architecture, electronic interface and acquisition capability. Toshiba identifies photocopiers and colour image scanners as primary applications, but the underlying three-line CCD technology can be evaluated for other controlled scanning arrangements involving printed or coloured materials. An industrial document-handling system, for example, may require accurate reproduction of colour information across a defined sheet width, making a detector designed for A4 scanning technically relevant. However, a machine inspecting a rapidly moving production web may demand different acquisition speed or optical geometry. The OEM should assess material width, required spatial sampling, movement characteristics and colour-processing requirements before selecting the device. Manufacturer application examples provide useful guidance but do not establish compatibility with every machine using line scanning.

11. How does the 22-pin ceramic package affect the design and manufacturing of an OEM scanner?

Toshiba TCD2564DG is supplied in a 22-pin ceramic dual-inline package designed for through-hole mounting. This package arrangement influences the PCB footprint, component orientation, mechanical support and optical alignment within the scanner housing. The engineer must use the actual manufacturer package drawing when establishing placement and mechanical tolerances because small differences in the sensing-array position can affect the projected image. The through-hole mounting arrangement may also influence the manufacturing process compared with designs built around surface-mount sensors. Suitable handling is important because optical semiconductor components may be affected by contamination, electrostatic damage or mechanical stress. Once the scanner has been qualified, the exact package and ordering designation should be preserved in the purchasing records. A semiconductor with a similar nominal resolution but a different package should not be accepted as a direct replacement without engineering evaluation.

12. How can an OEM reduce shading and colour variation across the width of an A4 scan?

The first requirement is a stable optical and illumination arrangement that provides sufficiently uniform signal across the active sensing length. Differences in lens transmission, illumination geometry and electronic channel response can create variations across a scanned document even when the paper itself is uniform. The scanner may therefore require calibration using suitable reference targets to establish correction factors for the combined optical and electronic system. For colour acquisition, channel balance should also be considered because the red, green and blue sensing lines have different typical sensitivities. However, calibration should not be used to conceal severe optical misalignment or inadequate light, since excessive correction can amplify noise or reduce useful information. The OEM should verify that shading correction remains appropriate under normal scanning conditions and investigate changes caused by contamination, illumination aging or mechanical movement. A consistent imaging system begins with stable hardware and uses electronic correction to refine the acquired data.

13. What factors determine the scanning speed of a document scanner using Toshiba TCD2564DG?

The scanning speed depends on the required longitudinal resolution, available line acquisition rate, document movement mechanism, illumination and processing throughput. A scanner targeting approximately 600 dpi must acquire successive lines closely enough along the page to preserve the intended spatial sampling. Toshiba publishes a maximum line-rate figure of approximately 10.5 kHz for the device, providing an important electronic limit for the acquisition calculation. However, the mechanical system must move the document or optical carriage at a rate consistent with the chosen sampling interval, and the detector must receive sufficient light during acquisition. The processing electronics must also sustain the resulting data flow and reconstruct the colour channels correctly. Real scanning performance may be influenced by acceleration, page handling and other equipment functions. An OEM should therefore calculate the complete scan cycle and verify pages-per-minute performance with actual documents rather than use the semiconductor line rate as a standalone speed claim.

14. Can Toshiba TCD2564DG replace another 5,400-pixel Toshiba CCD sensor in an existing scanner?

A matching 5,400-element count is not sufficient evidence of direct interchangeability. Different Toshiba CCD products may have distinct element geometries, active sensing lengths, colour-line arrangements, clocking requirements, output channels and packages. Even when two devices support similar scanning resolutions, the existing PCB or optical assembly may have been developed around one particular semiconductor configuration. Substituting another device could require changes to mechanical mounting, electrical timing or colour-registration processing. The OEM should compare the complete manufacturer documentation and determine whether the proposed device satisfies the original scanner's requirements. Any replacement should be qualified using representative documents and realistic operating conditions before purchasing approval. For established production equipment, the safer purchasing approach is to request the exact engineering-approved manufacturer part number unless the technical team has formally authorized an alternative. Kyptec Automation® can receive the specified semiconductor requirement for sourcing consideration.

15. What details should international buyers provide when requesting Toshiba TCD2564DG for OEM manufacturing?

An international purchasing enquiry should identify Toshiba as the manufacturer, Toshiba TCD2564DG as the required component, the quantity needed and the delivery destination. If the purchase concerns an established scanner design, the buyer should ensure that the part number corresponds exactly to the engineering-approved semiconductor. Information about anticipated production quantities or the intended purchasing period may also help clarify the commercial requirement, but it does not replace accurate device identification. Kyptec Automation® provides a dedicated Image Sensor enquiry channel and publishes worldwide export contact information, making it relevant to overseas manufacturers seeking specified semiconductor products. Actual availability, pricing, lead time and shipping arrangements should be confirmed for the requested order. International purchasers should also review applicable import and transaction responsibilities before incorporating the component delivery into their manufacturing schedule. A precise enquiry helps avoid misunderstandings about the device and quantities being requested.

16. Why should OEM document scanner manufacturers consider Kyptec Automation® for Toshiba TCD2564DG sourcing?

Kyptec Automation® provides a dedicated Image Sensor offering that covers Toshiba semiconductor technologies and allows equipment manufacturers to submit exact make, part-number and quantity requirements. This approach is valuable for OEM document scanner developers because Toshiba TCD2564DG has specific sensing geometry, RGB-line configuration, electrical requirements and mechanical packaging that distinguish it from other imaging devices. A scanner developed around this component should continue using the approved semiconductor unless engineering authorizes a replacement after suitable evaluation. Kyptec Automation® provides a focused commercial contact point for such requirements, including enquiries from buyers outside India. The published product category also covers Hamamatsu and ON Semiconductor technologies, giving customers access to a broader manufacturer-specific image sensor enquiry channel without treating those different devices as interchangeable. Actual commercial availability, pricing and delivery arrangements must still be confirmed for Toshiba TCD2564DG, while final technical suitability remains the responsibility of the OEM's engineering qualification process.

Conclusion: Toshiba TCD2564DG for Precision Colour Document Scanning and OEM Image Sensor Procurement

Toshiba TCD2564DG is a three-line RGB CCD linear image sensor designed for document imaging applications that require detailed spatial sampling and independent colour-channel measurements. Its 5,400 sensing elements per line, 7 µm pixel pitch and approximately 37.8 mm active sensing length provide a technical basis for colour A4 scanning at around 600 dpi. The device's high-sensitivity photodiodes, internal clamp circuit and defined electrical interface support integration into dedicated scanner electronics, while its 22-pin ceramic package establishes specific mechanical design requirements. These characteristics make Toshiba TCD2564DG relevant to OEM manufacturers developing colour document scanners, photocopiers and suitable specialized scanning equipment, provided that the complete system is designed around the semiconductor's actual specifications.

Accurate document imaging depends on more than detector resolution. The lens must project the page with sufficient sharpness across the sensing row, the illumination must provide consistent optical information, and the scanning mechanism must maintain the required relationship between physical movement and successive acquisitions. The three RGB arrays also require appropriate colour registration because their physical separation means that the same document location is observed at different moments. Electronic processing must account for the different channel responses and provide useful colour reproduction without introducing excessive noise or distortion. OEM qualification should therefore include representative text, graphics and photographs, along with realistic scanning speeds and operating conditions. A correct engineering decision is one that demonstrates dependable document-reproduction quality in the finished equipment.

Kyptec Automation® provides a dedicated image sensor supplier in India enquiry channel covering Toshiba image sensing technologies for OEM applications. Manufacturers can communicate their requirement for Toshiba TCD2564DG together with the intended quantity and delivery destination for sourcing consideration. Its Image Sensor offering provides a focused commercial route for an accurately specified semiconductor, with actual availability, pricing and delivery terms confirmed during the enquiry process. This is particularly useful for manufacturers seeking to preserve the same component configuration across engineering development and repeated scanner production.

A dependable purchasing decision for Toshiba TCD2564DG combines accurate interpretation of manufacturer specifications with suitable optical design, colour calibration, controlled mechanical scanning and precise component identification. By maintaining this connection between engineering and procurement, OEM manufacturers can make informed choices about sensor integration, reduce avoidable substitution risks and support consistent production of colour document imaging equipment.