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CFA634 USB LCD
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CFA634-NFA-KU
CFA-634 USB LCD 20x4, No Backlight, FSTN Positive, Reflective 0°C - +50°C 6:00, (Must also order WRUSBY03 or WRUSBY11 cable)
CFA634-NFA-KU: Front view
CFA634-NFA-KU


CFA634-TFB-KU
CFA-634 USB LCD 20x4, White Edge LED Backlight, FSTN Positive, Transflective 0°C - +50°C 6:00, (Must also order WRUSBY03 or WRUSBY11 cable)
CFA634-TFB-KU: Front, backlight on
CFA634-TFB-KU
CFA634-TFB-KU: Front view
CFA634-TFB-KU


CFA634-TMC-KU
CFA-634 USB LCD 20x4, White Edge LED Backlight, STN Negative, Blue, Transmissive 0°C - +50°C 6:00, (Must also order WRUSBY03 or WRUSBY11 cable)
CFA634-TMC-KU: Front, backlight on
CFA634-TMC-KU


CFA634-YFB-KU
CFA-634 USB LCD 20x4, Yellow/Green LED Backlight, FSTN Positive, Transflective 0°C - +50°C 6:00, (Must also order WRUSBY03 or WRUSBY11 cable)
CFA634-YFB-KU: Front, backlight on
CFA634-YFB-KU
CFA634-YFB-KU: Front view
CFA634-YFB-KU


CFA634-YMC-KU
CFA-634 USB LCD 20x4, Yellow/Green LED Backlight, STN Negative, Blue, Transmissive 0°C - +50°C 6:00, (Must also order WRUSBY03 or WRUSBY11 cable)
CFA634-YMC-KU: Front, backlight on
CFA634-YMC-KU
USB Interface - The USB interface version of the 634 has the full feature set of the serial interface 634 but allows connection to a USB port--using only a single cable for both power and data. Full compatibility with existing software is preserved by using our "Virtual COM port" driver. Connect the display install the driver and your computer will now show an additional COM port any time the display is connected.
CFA634-YMC-KU
CFA634-YMC-KU

Features:

Full 634 v2.0 feature set: This USB version retains the entire feature set of the original 634 v2.0:
  • The LCD material for the positive displays is FSTN (Film compensated Super Twisted Nematic) instead of STN. FSTN gives better contrast, faster response and makes an all-around more readable display.
  • The display as the ability to store a customized boot screen of your design in its EEPROM. All features of the display are controlled: characters displayed, user-definable characters, backlight setting, contrast setting, cursor position, cursor style, "wrap" setting, "scroll" setting, and even the scrolling marquee.
  • The CGROM is an enhanced version with many more useful characters: numeric superscripts, icons, mathematical symbols, some fractions, a great variety of arrows, many currency symbols, and more.
  • Available with 634 PC Mounting Bracket
  • Large, easy to read characters: 7.3mm (0.287") character height
  • Available with bright, even, software adjustable LED backlighting or in a low-power reflective model
  • Software controlled contrast
  • "Gapless" horizontal bargraphs
  • Software controlled terminal style automatic scrolling and line wrapping
  • Unique "Scrolling Marquee" feature continuously scrolls a message across the display without host intervention.
  • Buffered communication
  • Large display area in a compact 130mm x 63mm (5.12" x 2.48")package
  • Thin:
    • Reflective is 15.9mm (0.626") including DB-9 connector
    • LED Backlit is 19.9mm (0.783") including DB-9 connector
    The USB converter board and its compact connector does not add to the overall thickness of the module.
  • Negative voltage for contrast generated on board

Download:

Ultra simple Windows command-line demonstration program with C source code, 5K
Linux-compatible command-line demonstration program with C source code, 8K
Windows USB driver and installation instructions
Supported by CrystalControl freeware

Dimensions:

  • PCB Outline (W x H x D): 130mm x 63mm
  • Viewing Area: 102mm x 41.5mm
  • Active Area: 93.54mm x 34mm
  • Character Size: 3.84mm x 6.38mm
  • Dot Pitch: 0.78mm x 0.92mm
  • Dot Size: 0.72mm x 0.86mm
  • Characters x Lines: 20 x 4

Documents:

1 to 1 Template (33KB)
Metric Scale Drawing (39KB)
Inches Scale Drawing (39KB)
Datasheets