Product
This part number is pre-configured / assembled with a 7 pin Molex P/N 22-23-2037 header in J2.

Part Number: CFA634-TFH-KN16

Logic Level Serial (inverted) Interface,  20x4 LCD, RoHS / REACH Compliant, White Edge LED Backlight, FSTN Positive, Transflective, -20°C to +70°C operation, 6:00 viewing angle.

The CFA634 can use any of SIX interfaces on any modules in the family by simply changing the interface selection using a command setting and making the appropriate jumper configurations. The interfaces are:

  1. CFA634-TFH-Kx: White edge-lit LED backlight with positive STN transflective mode. Displays dark (near-black) characters on light (near-white) background. The display can be read in normal office lighting, in dark areas, and in bright sunlight.
  2. CFA634-TMI-Kx: White edge-lit LED backlight with negative STN transmissive mode LCD. Displays light (nearwhite) characters on a blue background. The display can be read in normal office lighting and in dark areas. Maybe difficult to read in direct sunlight.
  3. CFA634-YDI-Kx: Yellow-green array LED backlight with negative FFSTN transmissive mode LCD. Displays yellow-green characters on a dark (near-black) background. The display can be read in normal office lighting and in dark areas. May be difficult to read in direct sunlight.
  4. CFA634-YFH-Kx: Yellow-green array LED backlight with positive FSTN transflective mode LCD. Displays dark (near-black) characters on yellow-green background. The display can be read in normal office lighting, in dark areas, and in bright sunlight.
  • Large easy-to-read LCD in a compact size can display 20 characters x 4 lines. Overall module size is 130.00 mm, width x 63.00 mm height x 19.90 mm depth (5.12" x 2.48" x 0.78"). Character height is 7.30 mm (0.29").
  • Attractive stainless steel bezel.
  • Optional PC CDROM mounting bracket with three choices of overlay to fit two 5.25" wide bays is available.
  • The displays have a 6 o’clock viewing angle (polarizer viewing direction).
  • Adjustable contrast. The module’s default contrast value will be acceptable for many applications. If necessary, you can adjust the contrast by using control function.
  • The modules have a RockWorks RW1067 controller.
  • Extended voltage (9-15 volts for interfaces using DB9 connector) and 5 volts power inputs standard for the controller.
  • Backlight is 5 volts only.
  • Use the nonvolatile memory capability (EEPROM) to customize the “power-on” display settings.
  • Wide temperature range for operation is -20°C to +70°C.
  • RoHS compliant. You can download the RoHS and REACH documents from the Datasheets & Files section.

Product Variants

  • square_foot Physical Characteristics

    Physical Characteristics

    Characters x Lines 20 x 4
    Module Overall width height depth
    millimeters 130 63 19.9
    inches 5.118 2.480 0.783
    PCB Outline width height depth
    millimeters 130 63 19.9
    inches 5.118 2.480 0.783
    Diagonal Dimension 3.92"
    Viewing Area Width Height
    millimeters 102 41.5
    inches 4.016 1.634
    Active Area Width Height
    millimeters 93.54 34
    inches 3.683 1.339
    Character Size Width Height
    millimeters 3.84 7.3
    inches 0.151 0.287
    Character Pitch Width Height
    millimeters 4.68 8.9
    inches 0.184 0.350
    Dot Size Width Height
    millimeters 0.72 0.86
    inches 0.028 0.034
    Dot Pitch Width Height
    millimeters 0.78 0.92
    inches 0.031 0.036
    Weight 119g
  • visibility Optical Characteristics

    Optical Characteristics

    Glass Type/Glass Color FSTN/Light-Gray
    Polarizer Transflective
    View Direction 6 o'clock
    Sunlight Readable Yes
    Backlight Color White
    Backlight Type LED
    Mode Positive
    Foreground Color Dark
  • nature Enviromental

    Environmental

    Operating Temperatures min max
    Celsius -20° 70°
    Fahrenheit -4° 158°
    Storage Temperatures min max
    Celsius -30° 80°
    Fahrenheit -22° 176°
    Humidity min max
    Non-condensing 0% 90%
  • cable Electronics

    Electronics

    Interface Logic Level Serial
  • picture_as_pdf Datasheets
  • download Files and Downloads
  • assured_workload Compliance Documents


Need a written quote? Add to cart, then enter your email address in the "request a quote" box.
Quantity:
Price:
Quantity Price
1 $80.91
10 $66.87
20 $64.48
50 $62.10
100 * $61.13
200 * $60.66
500 * $60.18
1000 * $59.23
* Pricing is subject to change. Contact us about potential lead times.

Part Change Notice

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  • text_snippet
    Part Change Notice #11226: Change to ENIG from Gold Plating
    Products Affected: CFA631-RMF-KU, CFA631-TMF-KU, CFA632-YFH-KS, CFA632-YDI-KS, CFA632-YFH-KU, CFA632-YDI-KU, CFA634-TFH-KS, CFA634-TMI-KS, CFA634-YFH-KS, CFA634-YDI-KS, CFA634-TFH-KU, CFA634-TMI-KU, CFA634-YFH-KU, CFA634-YDI-KU, CFA632-YDI-KL, CFA632-YDI-KN, CFA632-YDI-KC, CFA632-YDI-KP, CFA632-YFH-KL, CFA632-YFH-KN, CFA632-YFH-KC, CFA632-YFH-KP, CFA634-YDI-KC, CFA634-TMI-KC, CFA634-YFH-KC, CFA634-TFH-KC, CFA634-YFH-KL, CFA634-TFH-KL, CFA634-TMI-KL, CFA634-YDI-KL, CFA634-TFH-KP, CFA634-YFH-KP, CFA634-TMI-KP, CFA634-YDI-KP, CFA634-TFH-KN, CFA634-YFH-KN, CFA634-TMI-KN, CFA634-YDI-KN, CFA631P-TMF-KU
    Date Issued: September 5, 2023
    Summary: Change to ENIG from Gold Plating
    Description: The plating on these PCBs is changing from gold plating to ENIG.
    Reason: Gold plating is not as often used anymore and ENIG is a better plating process.
    Availability: This will be implemented on serial numbers with a SN date more recent than week 21 of 2023 with one exception: SNs 2321634TFHP544035 - 2321634TFHP544219 on a CFA634-TFH product will have the original gold plating. Contact Crystalfontz Support for up-to-date information by emailing support@crystalfontz.com.
  • text_snippet
    Part Change Notice #10658: Deprecation of "Drive Bay Kit Configurator" / New part numbers for drive bay kits.
    Products Affected: CFA631-RMF-KU, CFA633-YYB-KS, CFA633-TMC-KS, CFA633-RMC-KS, CFA633-YYB-KU, CFA633-TMC-KU, CFA633-RMC-KU, CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA631-TMF-KU, CFA635-TFE-KU, CFA635-YYE-KL, CFA635-TMF-KU, CFA635-YYE-KU, DS635-AL, DS635-BG, DS635-BK, DS635-AK, CFA533-YYH-KS, CFA533-YYH-KU, CFA533-TMI-KS, CFA533-TMI-KU, CFA533-YYH-KL, CFA533-TMI-KL, CFA533-YYH-KC, CFA533-TMI-KC, CFA533-YYH-KI, CFA633-YYH-KS, CFA633-TMI-KS, CFA633-YYH-KU, CFA633-TMI-KU, CFA632-YFH-KS, CFA632-YDI-KS, CFA632-YFH-KU, CFA632-YDI-KU, CFA634-TFH-KS, CFA634-TMI-KS, CFA634-YFH-KS, CFA634-YDI-KS, CFA634-TFH-KU, CFA634-TMI-KU, CFA634-YFH-KU, CFA634-YDI-KU, CFA633-RDI-KU, CFA633-RDI-KS, CFA533-TFH-KU, CFA533-TFH-KS, CFA633-TFH-KU, CFA633-TFH-KS, CFA533-TFH-KL, CFA533-TFH-KC, CFA735-TFK-KR, CFA735-TFK-KT, CFA735-TML-KR, CFA735-TML-KT, CFA735-YYK-KR, CFA735-YYK-KT, CFA632-YDI-KL, CFA632-YDI-KN, CFA632-YDI-KC, CFA632-YDI-KP, CFA632-YFH-KL, CFA632-YFH-KN, CFA632-YFH-KC, CFA632-YFH-KP, CFA634-YDI-KC, CFA634-TMI-KC, CFA634-YFH-KC, CFA634-TFH-KC, CFA634-YFH-KL, CFA634-TFH-KL, CFA634-TMI-KL, CFA634-YDI-KL, CFA634-TFH-KP, CFA634-YFH-KP, CFA634-TMI-KP, CFA634-YDI-KP, CFA634-TFH-KN, CFA634-YFH-KN, CFA634-TMI-KN, CFA634-YDI-KN, CFA631P-TMF-KU
    Date Issued: July 1, 2015
    Summary: Deprecation of "Drive Bay Kit Configurator" / New part numbers for drive bay kits.
    Description: Starting August 1, 2015 the "Drive Bay Kit Configurator" located at https://www.crystalfontz.com/products/select_kit.html will no longer be functional for ordering one of our Serial or USB displays (CFA533, CFA631, CFA632, CFA633, CFA634, CFA635, and CFA735) in a bracket or SLED. This functionality is being moved to the Customize and Add to Cart process when checking out. This will allow for further customization by our customers to better fit their needs.

    This change will eliminate the current "kits", but will add options not previously available such as pre-configured ATX functionality, and ALL the currently available interfaces will be orderable in a drive bay bracket or SLED.
    The new part numbers will have the bracket / SLED and overlay type as a PREFIX to the configured part number. The choice for bracket / SLED to a display order will be via the cart options. Our CFA835 displays were introduced with these configuration options.
    To see how the new options will look, and what the new part numbers will look like, please see one of our CFA835 parts:
    https://www.crystalfontz.com/cart/addtocart.php?product_id=2277&qty=1
    NOTE: The SLED is only available for the CFA635, CFA735, and CFA835 products.
    Reason: As part of our continuous improvement process, we are integrating the ordering of displays in drive bay and SLED kits as part of the display ordering process.
    Impact: Drive bay kits in their current configuration will no longer be available.
    Recommendation: Place orders prior to 2015-08-01 for upcoming production needs via our website or by contacting our logistics department via email: sales@crystalfontz.com, or by calling 1-888-206-9720 (International call +1-509-892-1200).
    After the 2015-08-01, please contact our engineering department via support@crystalfontz.com to assist you with ordering your bracket / SLED kits.
    Availability: Starting 2015-08-01, the bracket and SLED options for our serial and USB display will be part of the ordering process for the displays
    Price Change: Pricing bracket / SLED configurations will reflect manufacturing costs.
  • text_snippet
    Part Change Notice #10580: Reverted the SPI functionality to Crystalfontz CFA634 legacy implementation
    Products Affected: CFA634-YMC-KS, CFA634-NFA-KS, CFA634-TFB-KS, CFA634-TMC-KS, CFA634-YFB-KU, CFA634-YMC-KU, CFA634-NFA-KU, CFA634-TFB-KU, CFA634-TMC-KU, CFA634-NFG-KS, CFA634-TFH-KS, CFA634-TMI-KS, CFA634-YFH-KS, CFA634-YDI-KS, CFA634-NFG-KU, CFA634-TFH-KU, CFA634-YFH-KU, CFA634-YDI-KU, CFA634-YDI-KC, CFA634-TMI-KC, CFA634-YFH-KC, CFA634-TFH-KC, CFA634-YFH-KL, CFA634-TFH-KL, CFA634-TMI-KL, CFA634-TFH-KP, CFA634-YFH-KP, CFA634-TMI-KP, CFA634-YDI-KP, CFA634-TFH-KN, CFA634-YFH-KN, CFA634-TMI-KN, CFA634-YDI-KN
    Date Issued: December 20, 2013
    Summary: Reverted the SPI functionality to Crystalfontz CFA634 legacy implementation
    Last revision: v3.1.5
    Description: Reverted the SPI functionality to Crystalfontz CFA634 legacy implementation where the MISO line is used as a busy indicator instead of the module's unused transmit line. Firmware will migrate from v3.1.5 to v3.1.6.
    Reason: To maintain legacy functionality.
    Impact: Impact to customers utilizing SPI functionality only.
    Recommendation: For questions please contact Technical Service at 1-888-206-9720.
  • text_snippet
    Product Update #10546: (New Product) CFA634-TFH-KN16
    New Products:
    Date Issued: October 25, 2013
    Summary: (New Product) CFA634-TFH-KN16
    Description: Intelligent Serial LCD Modules: Logic Level Serial (inverted) Interface, 20x4 LCD module, white LED Backlight, FSTN Positive, -20°C to +70°C, 6:00

Part Change Notices

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