USB LCD Displays
This product is discontinued please contact support@crystalfontz.com to see if there is a replacement part available.
SPI 20x4 Character LCD (EOL)
Part Number: CFA634-NFG-KS
CFA-634 Serial LCD 20x4, RoHS Compliant, 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:
- 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.
- 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.
- 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.
- 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
RS232
Logic Level Serial
SPI
I2C
USB
Logic Level Serial Inverted
Datasheet
TECHNICAL SPECS
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 |
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 |
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% |
Electronics
| Interface | Logic Level Serial, RS232, SPI |
Part Change Notice
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Part Change Notice #10580: Reverted the SPI functionality to Crystalfontz CFA634 legacy implementation
Part Change Notice #10455: New v3.1 firmware to support CFA634 hardware v3.1 family of module
Part Change Notice #10454: New v3.1 hardware version for CFA634 family of modules.
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:
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 |
Product Update #10313: New Product in Intelligent Serial LCD Modules: CFA634-NFG-KS
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:
|
| 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) |
