This product is discontinued and has been replaced by CFA634-TMI-KU.
CFA634-TMC-KU photo

CFA634-TMC-KU

CFA-634 USB LCD 20x4, White Edge LED Backlight, STN Negative, Blue, Transmissive 0C to +50C, 6:00

CFA634 Family

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.
  • Robust packet based communications protocol with 16-bit CRC.
  • 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 Certificate of Compliance for ISO, RoHS, and REACH from the Doc/Files tab on the part number’s website page.
For its USB connection, this module uses a non-standard 2mm low profile connector. USB cables with this type of connector are not readily available at retail, so if you do not have this type of cable and cannot build one, please choose to add one of our USB cables with the proper connector below. Without a cable, you will not be able to use this module or connect it to your host system.

Please make sure to order either a WRUSBY03 cable or a WRUSBY33 cable with a module of this type.
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 5.11 2.48 0.78
PCB Outline
width height depth
millimeters 130 63 19.9
inches 5.11 2.48 0.78
Viewing Area
width height
millimeters 102 41.5
inches 4.01 1.63
Active Area
width height
millimeters 93.54 34
inches 3.68 1.33
Character Size
width height
millimeters 3.84 6.38
inches 0.15 0.25
Character Pitch
width height
millimeters 4.68 8.9
inches 0.18 0.35
Dot Size
width height
millimeters 0.72 0.86
inches 0.02 0.03
Dot Pitch
width height
millimeters 0.78 0.92

Optical Characteristics

Display Technology LCD
Display Addressing passive
Glass Type/Glass Color STN/Blue
Polarizer Transmissive
View Direction 6
Backlight Color White
Backlight Type LED
Mode Negative
Foreground Color White
Background Color Blue

Environmental

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

Electronics

Controller CFA 632/634
Interface USB

Datasheets

CFA-634_v2.0.pdf (1MB, Oct 2005, Datasheet v.2.0, Hardware v.2.3, Firmware v.2.0)
634full_v0_7.pdf (331KB, Apr 1999, Datasheet v.1.0, Hardware v.0.7, Firmware v.0.7)

Other Files

Subscribe to Part Change Notices by email Email subscription for changes to CFA634-TMC-KU or RSS RSS feed for changes to CFA634-TMC-KU

Part Change Notice #10580

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-TFH-KS4, CFA634-TMI-KS4, CFA634-YDI-KS4, CFA634-YFH-KS4, 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, CFA634-TFH-KC4, CFA634-TMI-KC4, CFA634-YDI-KC4, CFA634-YFH-KC4, CFA634-TFH-KL16, CFA634-TMI-KL16, CFA634-YDI-KL16, CFA634-YFH-KL16, CFA634-TFH-KN16, CFA634-TMI-KN16, CFA634-YDI-KN16, CFA634-YFH-KN16, CFA634-TFH-KP16, CFA634-TMI-KP16, CFA634-YDI-KP16, CFA634-YFH-KP16, CFA634-TFH-KS16, CFA634-TMI-KS16, CFA634-YDI-KS16, CFA634-YFH-KS16
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

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 -20C to +70C operation / -30C to +80C 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

    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.

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