This product is discontinued and has been replaced by CFA634-YDI-KU

20x4 USB Character LCD

Part Number: CFA634-YMC-KU

Datasheets

CFA-634 v2.0.pdf
(Oct 2005, Datasheet 2.0, Hardware 2.3, Firmware 2.0)
634full v0 7.pdf
(Apr 1999, Datasheet 1.0, Hardware 0.7, Firmware 0.7)

Part Change Notices

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Description

This is an early version of the CFA634. This page just exists for historical reference. If you'd like to puchase a current CFA634 please click here to see all our current CFA634 products.

TECHNICAL SPECS

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

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
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

Optical Characteristics

Glass Type/Glass Color STN/Blue
Polarizer Transmissive
View Direction 6 o'clock
Backlight Color Yellow-Green
Backlight Type LED
Mode Negative
Foreground Color Yellow
Background Color Dark

Environmental

Operating Temperatures min max
Celsius 50°
Fahrenheit 32° 122°
Storage Temperatures min max
Celsius -10° 60°
Fahrenheit 14° 140°
Humidity min max
Non-condensing 0% 90%

Electronics

Controller CFA 632/634
Interface USB

*Suggest a Correction

Part Change Notice

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Part Change Notice #10580: Reverted the SPI functionality to Crystalfontz CFA634 legacy implementation

Products Affected: CFA634-YFB-KS, 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.

Part Change Notice #10308: Update CFA634 series to firmware v2.3 and wide temperature LCD.

Products Affected: CFA634-YFB-KS, 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)

    Part Change Notice #10281: Revision change for USB board because we have changed the layout of the board, also the silk screen.

    Products Affected: CFA632-YFB-KU, CFA632-YMC-KU, CFA632-NFA-KU, CFA634-YFB-KU, CFA634-YMC-KU, CFA634-NFA-KU, CFA634-TFB-KU, CFA634-TMC-KU
    Date Issued: May 14, 2010
    Summary: Revision change for USB board because we have changed the layout of the board, also the silk screen.
    Description: Changed from v3.0 to v3.1, added ground trace around outside of PCB, changed layout, made aesthetic changes to the silk screen.
    Reason: Wanted to add 94v0 and WEEE symbol (trash can with "X") to the silk screen.
    Impact: Put new photos of the changed USB board on the site on the LCD modules which have the change.
    Availability: Immediately
    Price Change: None.