CFA634-NFA-KS

CFA-634 Serial LCD 20x4, RoHS Compliant, No Backlight, FSTN Positive|Reflective, 0°C to +50°C, 6:00
Recommended replacement parts:
CFA634-YFH-KS or CFA634-TFH-KS

General
Tech Specs
Docs / Files
Notices
Dimensions
Related
Photos

CFA634 Serial Family

New in v2.0:

This display is the "v2.0" version of our serial display series. This version is generally command and mechanically compatible with our earlier 1.x series displays, while adding many improvements:

The LCD material is now 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 now has 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 baud rates supported are now 19200, 9600, 4800 and 2400 baud. 1200 baud is no longer supported.
The PCB silkscreen has an abbreviated jumper setting table, so all the jumper settings are always in easy reference.
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.
The processor’s reset circuit has been improved to handle a wider range of slow-turn-on power supply conditions.

Other Features:

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
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" (F_{clk 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 108mm x 43mm (4.25" x 1.69")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.
Available in a LCD drive bay kit, (see mounting bracket photos)
Available with USB 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	15.9
inches	5	2	0.6

PCB Outline
	width	height	depth
millimeters	130	63	15.9
inches	5	2	0.6

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

Weight

147g

Optical Characteristics

Display Technology	LCD
Display Addressing	passive
Glass Type/Glass Color	FSTN/Light Grey
Polarizer	Reflective
View Direction	6:00

Backlight Type	None
Mode	Positive
Foreground Color	Dark
Background Color	Light Grey

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

Logic Level Serial, RS232, SPI

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-KS_2D_CAD (266KB)
1 to 1 Template - CFA634-xxx-KS_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)