CFA634-YMC-KU

CFA-634 USB LCD 20x4, Yellow/Green LED Backlight, STN Negative, Blue, Transmissive 0°C - +50°C, 6:00

General
Tech Specs
Docs / Files
Notices
Dimensions
Related
Photos

CFA634 USB Family

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.
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
Available in a LCD drive bay kit, (see mounting bracket photos)
Available with serial interface

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	2	0.7

PCB Outline
	width	height	depth
millimeters	130	63	19.9
inches	5	2	0.7

Viewing Area
	width	height
millimeters	102	41.5
inches	4	1.6

Active Area
	width	height
millimeters	93.54	34
inches	3.68	1

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	0.3

Dot Size
	width	height
millimeters	0.72	0.86
inches	0.02	0.03

Dot Pitch
	width	height
millimeters	0.78	0.92
inches	0.03	0.03

Optical Characteristics

Display Technology	LCD
Display Addressing	passive
Glass Type/Glass Color	STN/Blue
Polarizer	Transmissive
View Direction	6:00

Backlight Color	Yellow-Green
Backlight Type	LED
Mode	Negative
Foreground Color	Yellow
Background Color	Dark

Environmental

Operating Temperatures
	min	max
Celsius	0°	50°
Farenheit	32°	122°

Storage Temperatures
	min	max
Celsius	-10°	60°
Farenheit	14°	140°

Humidity
	min	max
Non-condensing	0%	90%

Electronics

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

CAD Export - CFA634-xxx-KU_2D_CAD (284KB)
1 to 1 Template - CFA634-xxx-KU_1_to_1.pdf (46KB)

Subscribe to Part Change Notices by email or RSS

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: Wide temperature support with -20°C to +70°C operation / -30°C to +80°C storage 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. 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. 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.