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20x4 USB Character LCD

Part Number: CFA634-NFG-KU

CFA-634 USB LCD 20x4, No Backlight, FSTN Positive, Reflective -20°C to +70°C, 6:00

CFA634 Family Characteristics:
  • 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 CFA634 family has four colors choices:
  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, andin 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. May be 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.
  • Use any of six interfaces on any module in the CFA634 family by simply changing the interface selection in a command and using the appropriate jumper configurations.
  • 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 15.9
    inches 5.118 2.480 0.626
    PCB Outline width height depth
    millimeters 130 63 15.9
    inches 5.118 2.480 0.626
    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 6.38
    inches 0.151 0.251
    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 147g
  • visibility Optical Characteristics

    Optical Characteristics

    Glass Type/Glass Color FSTN/Light Gray
    Polarizer Reflective
    View Direction 6 o'clock
    Sunlight Readable Yes
    Backlight Type None
    Mode Positive
    Foreground Color Dark
    Background Color Light Gray
  • 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 USB
  • picture_as_pdf Datasheets
    picture_as_pdf
    CFA634-NFG-KU Data Sheet v1.1.pdf
    (Datasheet V 1.1, Hardware 2.4, Firmware 2.4)
    picture_as_pdf
    CFA634-NFG-KU Data Sheet v1.0.pdf
    (Datasheet V 1.0, Hardware 2.4, Firmware 2.4)

Part Change Notice

Subscribe to Part Change Notices by email Email subscription for changes to CFA634-NFG-KU or RSS RSS feed for changes to CFA634-NFG-KU
  • 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
    Part Change Notice #10455: New v3.1 firmware to support CFA634 hardware v3.1 family of module
    Products Affected: CFA634-TFB-KS, CFA634-TFB-KU, CFA634-NFG-KS, CFA634-TFH-KS, CFA634-TMI-KS, CFA634-YFH-KS, CFA634-YDI-KS, CFA634-NFG-KU, CFA634-TFH-KU, CFA634-TMI-KU, CFA634-YFH-KU, CFA634-YDI-KU
    Date Issued: February 6, 2013
    Summary: New v3.1 firmware to support CFA634 hardware v3.1 family of module
    Last revision: FW v2.4
    Description: As part of our continuous improvement process, the CFA634 family of modules has been redesigned to fall more in line with our other Value Add families of intelligent modules.

    The new firmware for the CFA634 family of modules will retain the same stream based command structure.

    Changes:
    Control the Boot Screen – Ctrl+I (\009)
    This command has increased functionality to include, but not limited to;
    - Interface selection
    - Baud rate
    - Data normal / inverted
    - Splash screen

    Separate USB and Serial interface builds to support the on-board USB interface design.


    With the change from Samsung S6A0073 to Rockworks RW1067, the following commands and functionality are deprecated:

    + Show inverted blinking block cursor – Ctrl+G (\007)
    + Set Scrolling Marquee Characters - Ctrl+U (\021)
    + Enable Scrolling Marquee - Ctrl+V (\022)

    * Specifications are subject to change as


    Reason: The firmware has been revised to support the hardware changes from the Samsung S6A0073 LCD controller to the Rockworks RW1067, and the Holtek HT48R30 one-time-programmable controller being replaced with the Cypress PSoC CY8C27443 for improved functionality.
    Impact: This new firmware version has changes and depreciated commands and functionality.
    Recommendation: Engineering samples should be available Quarter 3, 2013. Please send an email to support@crystalfontz.com to work with our engineering and support team to assist you with the migration.
    Availability: Q3 2013 - Samples available
    End of Q3 / Beginning Q4 2013 - Transition to new version when previous version is exhausted
    Q1 2014 - All CFA634 shipments new hardware
    Price Change: We are anticipating an increase in pricing.
    New pricing is TBD.
  • text_snippet
    Part Change Notice #10454: New v3.1 hardware version for CFA634 family of modules.
    Products Affected: CFA634-NFA-KS, CFA634-TFB-KS, CFA634-NFA-KU, CFA634-TFB-KU, CFA634-NFG-KS, CFA634-TFH-KS, CFA634-TMI-KS, CFA634-YFH-KS, CFA634-YDI-KS, CFA634-NFG-KU, CFA634-TFH-KU, CFA634-TMI-KU, CFA634-YFH-KU, CFA634-YDI-KU
    Date Issued: February 6, 2013
    Summary: New v3.1 hardware version for CFA634 family of modules.
    Last revision: HW v2.4
    Description: As part of our continuous improvement process, the CFA634 family of modules has been redesigned to fall more in line with our other Value Add families of intelligent modules.

    The module is keeping the same dimensions, mounting points, and existing header locations.

    Changes:
    - LCD controller is changing from Samsung S6A0073 to Rockworks RW1067
    - Holtek HT48R30 is being replaced by Cypress PSoC CY8C27443
    - USB interface integrated on PCB using FTDI FT232RL
    - PCB layout changed to accommodate new LCD controller, new microcontroller, integrated USB interfaces
    - The following hardware functionality has been migrated to firmware control;
    - - Interface selection
    - - Data normal / Inverted
    - - Splash screen control
    - - Baud rate

    * Specifications are subject to change
    Reason: Samsung S6A0073 LCD controller is EOL. Module has been redesigned to incorporate the Rockworks RW1067. The Holtek HT48R30 one-time-programmable controller replaced with the Cypress PSoC CY8C27443 for improved functionality.
    Impact: This new hardware version is designed to be as fit and form compatible as possible with the current shipping hardware. There are major changes to the PCB layout due to the re-design of the CFA634 family.

    Existing header locations and mounting points are renaming the same.

    Additional header locations have been added for programming the PSoC and future functionality.
    Recommendation: Engineering samples should be available Quarter 3, 2013. Please send an email to support@crystalfontz.com to work with our engineering and support team to assist you with the migration.
    Availability: Q3 2013 - Samples available
    End of Q3 / Beginning Q4 2013 - Transition to new version when previous version is exhausted
    Q1 2014 - All CFA634 shipments new hardware
    Price Change: We are anticipating an increase in pricing.
    New pricing is TBD
  • text_snippet
    Part Change Notice #10316: Minor PCB revision to accommodate longer life MLCC capacitors. Hardware and firmware updating to v2.4.
    Products Affected: CFA634-NFG-KS, CFA634-TFH-KS, CFA634-TMI-KS, CFA634-YFH-KS, CFA634-YDI-KS, CFA634-NFG-KU, CFA634-TFH-KU, CFA634-TMI-KU, CFA634-YFH-KU, CFA634-YDI-KU
    Date Issued: February 1, 2011
    Summary: Minor PCB revision to accommodate longer life MLCC capacitors. Hardware and firmware updating to v2.4.
    Last revision: Hardware v2.3, Firmware v2.3
    Description: In a continuation of product improvement the CFA634 series has the following improvements:


    1. PCB changes to accommodate MLCC capacitors. This hardware revision to v2.4 impacts C7, C3, and C4.

    2. The firmware will be updated to v2.4 to reflect the new hardware version. No other changes to the firmware are being made.



    Minor PCB revision to v2.4 to accommodate longer life MLCC capacitors. Firmware will be updated to v2.4 reflect hardware version.
    Reason: Manufacturing improvements allow for building the CFA634 series with MLCC capacitors. The MLCC have a longer life than the electrolytic capacitors currently being used.
    Impact: The new version is designed to be Fit, Form, and Function compatible with previous versions of the CFA634 series.

    Please see the v2.3 PCN for physical differences from older versions:

    https://www.crystalfontz.com/products/pcn.phtml?id=10308
    Recommendation: Engineering samples should be available by the end of Quarter 1, 2011. Please send an email to support@crystalfontz.com to work with our engineering and support team to assist you with the migration.
    Availability: Volume availability Second Quarter 2011.
    Price Change: No price change at this time
  • text_snippet
    Product Update #10314: New Product in Intelligent USB LCD Modules: CFA634-NFG-KU
    New Product: CFA634-NFG-KU
    Date Issued: January 11, 2011
    Summary: New Product in Intelligent USB LCD Modules: CFA634-NFG-KU
    Description: CFA-634 USB LCD 20x4, No Backlight, FSTN Positive, Reflective -20°C to +70°C, 6:00
  • text_snippet
    Part Change Notice #10308: Update CFA634 series to firmware v2.3 and wide temperature LCD.
    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-TMI-KU, CFA634-YFH-KU, CFA634-YDI-KU
    Date Issued: January 10, 2011
    Summary: Update CFA634 series to firmware v2.3 and wide temperature LCD.
    Last revision: Hardware v2.3, Firmware v2.0
    Description: In a continuation of product improvement the CFA634 series has the following improvements:
    1. Wide temperature support with -20°C to +70°C operation / -30°C to +80°C storage

    2. The bezel changed from black painted metal to stainless steel. Stainless steel has lower environmental impact and improves ESD protection. If your design has the bezel exposed, it will show the silver color of the stainless steel rather than the previous painted black bezel.

    3. The previous CFA634-YMC-KS and CFA634-YMC-KU (new CFA634-YDI-KS and CFA634-YDI-KU) changed from STN to double negative (FFSTN) LCD for improved appearance.

    4. Firmware revision to match hardware revision and is now displayed on the boot screen
      Reason: Improvements in design allow for better manufacturing, ESD protection, and appearance.
      Impact: The new version is designed to be Fit, Form, and Function compatible with previous versions of the CFA634 series. Semi-Custom and Defined Parts will have updated part numbers.
      Recommendation: Engineering samples should be available by the end of Quarter 1, 2011. Please send an email to support@crystalfontz.com to work with our engineering and support team to assist you with the migration.
      Availability: Volume availability Second Quarter 2011.
      Price Change: No price change at this time
      Attachment: 634_Wide_Temp_PCN.pdf (285KB)