This product is discontinued and has been replaced by CFA634-YFB-KS

20x4 Character LCD

Part Number: CFA634v1


  • RS-232 interface (1200, 2400, 4800 and 9600 baud)
  • DB9 connector provided for simple RS-232 hookup
  • 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
  • Large number support in 3 and 4 character wide formats
  • Software controlled terminal style automatic scrolling and line wrapping
  • Unique "Scrolling Marquee" feature continuously scrolls a message across the display without host intervention.
  • Low speed "SPI" (Fclk max=18KHz) and "Inverted TTL" RS-232 for embedded applications
  • Buffered communication
  • Single board construction--no connectors to fail
  • 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
  • Negative voltage for contrast generated on board
  • Extended voltage (9-15v) and 5v power inputs standard on all modules for the controller. Backlight is 5v only.
  • Low power: Non-backlight operation will self-power from the DTR and RTS lines of most serial ports.


For reference only. For design purposes, please use the specifications in the datasheet.

Physical Characteristics

Characters x Lines 20 x 4

Optical Characteristics


Controller CFA 632/634

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