20x4 Serial Character LCD from Crystalfontz

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            This part is no longer available for purchasing. All existing CFA635-TFE-KL products are transitioning to CFA635-TFK-KL as part of our continuous improvement process.          
20x4  Serial Character LCDPart Number: CFA635-TFE-KLTTL / Logic level (0-5v) Serial 20x4 character LCD module with Keypad, White Edge LED Backlight, FSTN Positive, Transflective 0°C to +50°C operation, and 12:00 viewing angle.
	LED backlit 20x4 LCD
	Integrated LED backlit 6-button translucent silicon keypad with screened legend
	Four bicolor (red + green) LEDs. The LEDs’ brightness can controlled by the host software, which allows mixing the LEDs to produce other colors (yellow and orange)
	Fully decoded keypad: any key combination is valid and unique
	LCD characters are contiguous in both X and Y directions to allow the host software to display "gapless" bar graphs in horizontal or vertical directions
	Robust packet based communications protocol with 16-bit CRC
	Compact size: fits in a 1U rack mount case (37mm overall height)
	ATX power supply control functionality allows the buttons on the CFA-635 to replace the "power" and "reset" buttons on your system, simplifying your front panel design (requires additional cables or hardware).
	Built-in factory re-programmable microcontroller
	Non-volatile memory capability ("EEPROM"):
					Customize the "power-on" display and LED settings
			16-byte "scratch" register for storing IP, netmask, system serial number

	
Product Variations

 square_foot Physical Characteristics
Physical Characteristics

        Characters x Lines
            20 x 4


    Module Overall        width
        height
        depth
		  

        millimeters
        142
        37
        20.8
    

        inches
        5.59
        1.46
        0.82
    
*depth doesn't include Keypad


        Diagonal Dimension
            3.19"


    Viewing Area        Width
        Height
		  

        millimeters
        82.95
        27.5
    

        inches
        3.27
        1.08
    


    Active Area        Width
        Height
		  

        millimeters
        77.95
        22.35
    

        inches
        3.07
        0.88
    


    Character Size        Width
        Height
		  

        millimeters
        3.2
        4.85
    

        inches
        0.126
        0.191
    


    Character Pitch        Width
        Height
		  

        millimeters
        3.9
        5.6
    

        inches
        0.154
        0.220
    


    Dot Size        Width
        Height
		  

        millimeters
        0.6
        0.65
    

        inches
        0.024
        0.026
    


    Dot Pitch        Width
        Height
		  

        millimeters
        0.65
        0.7
    

        inches
        0.026
        0.028
    


        Weight
            66g


        Keystroke Travel
            2.4mm

 visibility Optical Characteristics
Optical Characteristics

        Glass Type/Glass Color
            FSTN/Light Gray
Polarizer
            Transflective
View Direction
            12 o'clock
Sunlight Readable
            Yes


        Backlight Color
            White
Backlight Type
            LED
Mode
            Positive
Foreground Color
            Dark
Background Color
            Light Gray

 electric_bolt Electrical Specification
Electrical Specifications

        Module Connector Pitch
            2.54mm

 nature Environmental
Environmental

    Operating Temperatures        min
        max
		  

        Celsius
        0°
        50°
    

        Fahrenheit
        32°
        122°
    


    Storage Temperatures        min
        max
		  

        Celsius
        -10°
        60°
    

        Fahrenheit
        14°
        140°
    


    Humidity        min
        max
		  

        Non-condensing
        0%
        90%
    

 cable Electronics
Electronics

        Interface
            Logic Level Serial

 picture_as_pdf Datasheets
picture_as_pdfCFA635-xxx-KL Data Sheet Release 2013-03-06.pdf
(Hardware h1v2, Firmware s2v0)
Previous Versions of Datasheetspicture_as_pdfPreliminary h1v2/s2v0 CFA635 KL Datasheet
(Datasheet V Preliminary, Hardware 1.2, Firmware s2.0)
picture_as_pdfCFA635-TFE-KL Data Sheet v2.1.pdf
(Datasheet V 2.1, Hardware 1.1, Firmware s1.6)
picture_as_pdfCFA635-TFE-KL Data Sheet v2.0.pdf
(Datasheet V 2.0, Hardware v1.1, Firmware s1.6)
picture_as_pdfCFA635TFEKL v1.0.pdf
(Datasheet V 1.0, Hardware 1.0, Firmware 1.3)
 download Files and Downloads
folder_zip Hardware Design - 3D Model
folder_zip CAD Export - CFA635 2D CAD
folder_zip CAD Export - CFA635 3D CAD Exports
picture_as_pdf 1 to 1 Template - CFA635 Family 1 to 1 Drawing
picture_as_pdf Other Document - BRKT635 5.25" Half-Height LCD Drive Bay Mounting Bracket 
picture_as_pdf Other Document - Intelligent LCD Comparison

					                        
                       
                       
                      
                                                
                            
                        
                        

    
    



    	 

     

Module Overall	width	height	depth
millimeters	142	37	20.8
inches	5.59	1.46	0.82
*depth doesn't include Keypad

Viewing Area	Width	Height
millimeters	82.95	27.5
inches	3.27	1.08

Active Area	Width	Height
millimeters	77.95	22.35
inches	3.07	0.88

Character Size	Width	Height
millimeters	3.2	4.85
inches	0.126	0.191

Character Pitch	Width	Height
millimeters	3.9	5.6
inches	0.154	0.220

Dot Size	Width	Height
millimeters	0.6	0.65
inches	0.024	0.026

Dot Pitch	Width	Height
millimeters	0.65	0.7
inches	0.026	0.028

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

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

Humidity	min	max
Non-condensing	0%	90%

Notices

Part Change Notice

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Part Change Notice #10658: Deprecation of "Drive Bay Kit Configurator" / New part numbers for drive bay kits.

Products Affected:	CFA631-RMF-KU1, CFA631-RMF-KU2, CFA631-RMF-KU, CFA633-YYB-KS, CFA633-TMC-KS, CFA633-RMC-KS, CFA633-YYB-KU, CFA633-TMC-KU, CFA633-RMC-KU, CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA631-TMF-KU, CFA635-TFE-KU, CFA635-YYE-KL, CFA635-TMF-KU, CFA635-YYE-KU, DS635-AL, DS635-BG, DS635-BK, DS635-AK, CFA533-YYH-KS, CFA533-YYH-KU, CFA533-TMI-KS, CFA533-TMI-KU, CFA533-YYH-KL, CFA533-TMI-KL, CFA533-YYH-KC, CFA533-TMI-KC, CFA533-YYH-KI, CFA633-YYH-KS, CFA633-TMI-KS, CFA633-YYH-KU, CFA633-TMI-KU, CFA632-YFH-KS, CFA632-YDI-KS, CFA632-YFH-KU, CFA632-YDI-KU, CFA634-TFH-KS, CFA634-TMI-KS, CFA634-YFH-KS, CFA634-YDI-KS, CFA634-TFH-KU, CFA634-TMI-KU, CFA634-YFH-KU, CFA634-YDI-KU, CFA633-RDI-KU, CFA633-RDI-KS, CFA533-TFH-KU, CFA533-TFH-KS, CFA633-TFH-KU, CFA633-TFH-KS, CFA533-TFH-KL, CFA533-TFH-KC, CFA735-TFK-KR, CFA735-TFK-KT, CFA735-TML-KR, CFA735-TML-KT, CFA735-YYK-KR, CFA735-YYK-KT, CFA631-RMF-KU32, CFA631-RMF-KU128, CFA631-RMF-KU160, CFA631-RMF-KU33, CFA631-RMF-KU129, CFA631-RMF-KU161, CFA631-RMF-KU-162, CFA632-YDI-KL, CFA632-YDI-KN, CFA632-YDI-KC, CFA632-YDI-KP, CFA632-YFH-KL, CFA632-YFH-KN, CFA632-YFH-KC, CFA632-YFH-KP, CFA634-YDI-KC, CFA634-TMI-KC, CFA634-YFH-KC, CFA634-TFH-KC, CFA634-YFH-KL, CFA634-TFH-KL, CFA634-TMI-KL, CFA634-YDI-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, CFA631P-TMF-KU
Date Issued:	July 1, 2015
Summary:	Deprecation of "Drive Bay Kit Configurator" / New part numbers for drive bay kits.
Description:	Starting August 1, 2015 the "Drive Bay Kit Configurator" located at https://www.crystalfontz.com/products/select_kit.html will no longer be functional for ordering one of our Serial or USB displays (CFA533, CFA631, CFA632, CFA633, CFA634, CFA635, and CFA735) in a bracket or SLED. This functionality is being moved to the Customize and Add to Cart process when checking out. This will allow for further customization by our customers to better fit their needs. This change will eliminate the current "kits", but will add options not previously available such as pre-configured ATX functionality, and ALL the currently available interfaces will be orderable in a drive bay bracket or SLED. The new part numbers will have the bracket / SLED and overlay type as a PREFIX to the configured part number. The choice for bracket / SLED to a display order will be via the cart options. Our CFA835 displays were introduced with these configuration options. To see how the new options will look, and what the new part numbers will look like, please see one of our CFA835 parts: https://www.crystalfontz.com/cart/addtocart.php?product_id=2277&qty=1 NOTE: The SLED is only available for the CFA635, CFA735, and CFA835 products.
Reason:	As part of our continuous improvement process, we are integrating the ordering of displays in drive bay and SLED kits as part of the display ordering process.
Impact:	Drive bay kits in their current configuration will no longer be available.
Recommendation:	Place orders prior to 2015-08-01 for upcoming production needs via our website or by contacting our logistics department via email: sales@crystalfontz.com, or by calling 1-888-206-9720 (International call +1-509-892-1200). After the 2015-08-01, please contact our engineering department via support@crystalfontz.com to assist you with ordering your bracket / SLED kits.
Availability:	Starting 2015-08-01, the bracket and SLED options for our serial and USB display will be part of the ordering process for the displays
Price Change:	Pricing bracket / SLED configurations will reflect manufacturing costs.

Part Change Notice #10406: Supporting firmware for the reactivation of the CFA635 family of modules.

Products Affected:	CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA635-TFE-KU, CFA635-YYE-KL, XES635BK-TFE-KU, XES635BK-TMF-KU, XES635BK-YYE-KU, CFA635-TMF-KU, CFA635-YYE-KU
Date Issued:	March 20, 2012
Summary:	Supporting firmware for the reactivation of the CFA635 family of modules.
Last revision:	1v6
Description:	The CFA635 family of modules is being reactivated with a new LCD controller chip, the Rockworks RW1067. The majority of the changes to the firmware have been in support of the RW1067 LCD controller and are transparent to the user interface. The changes to the CFA635 2v0 firmware: For hardware changes related to this firmware update, please see PCN #10405 Updates Command 1 (0x01): Get Hardware & Firmware Version Modules with the serial interface, -KL and -KS suffix, will report: CFA635:h1v2,s2v0 Modules with the USB interface, -KU suffix, will report: CFA635:h1v2, u2v0 Command 12 (0x0C): Set LCD Cursor Style Option 4 = inverting, blinking block is no longer supported. This option will result in a blinking underscore. Command 22 (0x16): Send Command Directly to the LCD Controller Any command sent specifically to the Samsung S6A0073 will need to be reviewed / modified for the commands / registers of the Rockworks RW1067. Please contact the Crystalfontz Engineering Support Team at support@crystalfontz.com for the RW1067 datasheet. Enhancements Command 28 (0x1C): Set ATX Power Switch Functionality Added auto polarity switch. Improved pulse length functionality. Added feature to hold until system off during power down. Fixes Updates to timings and sequence of Serial interface power up to prevent possible corruption of data displayed
Reason:	When the CFA635 family was scheduled for End of Life (see PCN #10365) there was no replacement available for the Samsung S6A0073 LCD controller. The CFA735 family was designed as replacement for the CFA635, allowing a path for improved performance, graphics, and the ability for end users to write their own firmware to take advantage of the capabilities of the enhanced hardware. After the development of the CFA735 family, the RW1067 was developed as a replacement for the Samsung S6A0073 LCD controller for Crystalfontz America, Inc by Rockworks (China).
Impact:	This announcement impacts all variants, interfaces, and part numbers that currently use the CFA635 family of modules. The CFA635 can continue to be used in current and future designs.
Recommendation:	Continue to order and build with the CFA635 as required by production schedules. Transition to the CFA635 1v2 hardware and supporting firmware should be a seamless process. Engineering samples for qualification for the revised CFA635 are scheduled to be available Q3 of 2012.
Availability:	Q2 2012 Review / Update customer Defined Part custom firmware Q3 2012 New hardware and supporting firmware available for engineering samples Estimated - Begin transition to 1v2 hardware as 1v1 hardware inventory is depleted NOTE: We will not ship production orders of 1v2 hardware until the 1v1 inventory is depleted Q4 2012 Estimated - CFA635 1v1 hardware to be exhausted, transition to CFA635 1v2 hardware complete
Price Change:	No scheduled price change at this time.

Part Change Notice #10405: Reactivation of the CFA635 family of modules with 1v2 hardware and supporting firmware.

Products Affected:	CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA635-TFE-KU, CFA635-YYE-KL, XES635BK-TFE-KU, XES635BK-TMF-KU, XES635BK-YYE-KU, CFA635-TMF-KU, CFA635-YYE-KU
Date Issued:	March 20, 2012
Summary:	Reactivation of the CFA635 family of modules with 1v2 hardware and supporting firmware.
Last revision:	1v1
Description:	The CFA635 family of modules is being reactivated with a new LCD controller chip, the Rockworks RW1067. The changes to the CFA635 1v2 hardware are as follows: LCD controller changing from Samsung S6A0073 to Rockworks RW1067 Supporting driving circuitry between the LCD controller and the LCD glass has been updated to support the Rockworks RW1067 The PCB layout has been updated to support the Rockworks RW1067 Firmware updates to support the Rockworks RW1067 and functional improvements – See PCN #10406 The only changes to the CFA635 family are to support the Rockworks RW1067 controller. There are no other physical changes to the CFA635.
Reason:	When the CFA635 family was scheduled for End of Life (see PCN #10365) there was no replacement available for the Samsung S6A0073 LCD controller. The CFA735 family was designed as replacement for the CFA635, allowing a path for improved performance, graphics, and the ability for end users to write their own firmware to take advantage of the capabilities of the enhanced hardware. After the development of the CFA735 family, the RW1067 was developed as a replacement for the Samsung S6A0073 LCD controller for Crystalfontz America, Inc by Rockworks (China).
Impact:	This announcement impacts all variants, interfaces, and part numbers that currently use the CFA635 family of modules. The CFA635 can continue to be used in current and future designs.
Recommendation:	Continue to order and build with the CFA635 as required by production schedules. Transition to the CFA635 1v2 hardware and supporting firmware should be a seamless process. Engineering samples for qualification for the revised CFA635 are scheduled to be available Q3 of 2012.
Availability:	Q2 2012 Review / Update customer Defined Part custom firmware Q3 2012 New hardware and supporting firmware available for engineering samples Estimated - Begin transition to 1v2 hardware as 1v1 hardware inventory is depleted NOTE: We will not ship production orders of 1v2 hardware until the 1v1 inventory is depleted Q4 2012 Estimated - CFA635 1v1 hardware to be exhausted, transition to CFA635 1v2 hardware complete
Price Change:	No scheduled price change at this time.

Product Update #10377: CFA635 to CFA735 Migration

Products Affected:	CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA635-TFE-KU, CFA635-YYE-KL, CFA635-TMF-KU, CFA635-YYE-KU, CFA735-TFK-KR, CFA735-TFK-KT, CFA735-TML-KR, CFA735-TML-KT, CFA735-YYK-KR, CFA735-YYK-KT
Date Issued:	January 3, 2012
Summary:	CFA635 to CFA735 Migration
Description:	Detailed in formation on migrating from the CFA635 family to the CFA735 family of intelligent modules. The document covers the similarities and differences between the two family of modules.
Reason:	Support for the CFA735 product announcement.
Recommendation:	All CFA635 users should download and read the document.
Availability:	Q1 2012 – Initial run of CFA735 family available. Limited Quantities. Q2 2012 – Production level shipments of CFA735 family. Q3 2012 - CFA735 fully replaces CFA635.
Attachment:	CFA735_Migration_doc.pdf (734KB)

Part Change Notice #10365: End of Life announcement: CFA635 family of Intelligent Modules.

Products Affected:	CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA635-TFE-KU, CFA635-YYE-KL, XES635BK-TFE-KU, XES635BK-TMF-KU, XES635BK-YYE-KU, CFA635-TMF-KU, CFA635-YYE-KU
Date Issued:	October 6, 2011
Summary:	End of Life announcement: CFA635 family of Intelligent Modules.
Last revision:	HW: v1.1, FW: v1.6
Description:	Effective 2012-03-19: The CFA635 family of modules is no longer End of Life and is recommended for new designs. For a hardware changes please see PCN #10405 For a firmware changes please see PCN #10406 2011-10-06: Effective immediately, Crystalfontz America, Inc is announcing the End of Life (EOL) for the CFA635 family of modules. The CFA635 is a character based intelligent LCD module built around a Cypress PSoC® micro-controller and a Samsung S6A0073 LCD controller. Samsung announced the EOL of the S6A0073 at the end of 2007. After the announcement, Crystalfontz America, Inc began designing a replacement module and planned for continuing to manufacture and support the CFA635 family until a compatible replacement module was designed and available. REVISED: 2011-12-15 REVISED: 2012-03-19
Reason:	As part of our continuous improvement process, the engineering services group at Crystalfontz America Inc. is announcing the End of Life (EOL) to our CFA635 family of modules. This end of life is scheduled to take place at the end of 2012 Q2. The CFA635 is being replaced with the first of a new generation of intelligent modules from Crystalfontz America, Inc. This new module is the CFA735 family. The CFA735 family has been primarily designed to be a replacement for the CFA635 family with a number of enhancements / improvements.
Impact:	This announcement impacts all variants, interfaces, and part numbers that currently use the CFA635 family of modules. The CFA635 family is not recommended for new designs.
Recommendation:	Continue to order and build with the CFA635 as required by schedules. Plan on making transition to the CFA735 family of modules when available. To obtain more information on the CFA635 family replacement, the CFA735 family, please send an email to support@crystalfontz.com. We will provide you the following when available: preliminary datasheet notification of the initial run of CFA735 modules notice of any updates or changes to the CFA735
Availability:	Q4 2011: Pilot run of CFA735 family available CFA735 New product announcement Q1 2012: Final shipments of CFA635 from partner factory Q2 2012: CFA635 begins phase out and inventory draw down Last CFA635 orders accepted Production level shipments of CFA735 start Q3 2012: CFA635 inventory purged CFA735 fully replaces CFA635
Price Change:	There is no scheduled price change to the CFA635 family at this time. Pricing will be reviewed on a monthly basis.
Attachment:	CFA635_EOL_Notes.pdf (75KB)

Part Change Notice #10282: Keypad height change

Products Affected:	CFA633-YYB-KS, CFA633-TMC-KS, CFA633-RMC-KS, CFA633-YYB-KU, CFA633-TMC-KU, CFA633-RMC-KU, CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA635-TFE-KU, CFA635-YYE-KL, CFA635-TMF-KU, CFA635-YYE-KU, CFA533-YYH-KS, CFA533-YYH-KU, CFA533-TMI-KS, CFA533-TMI-KU, CFA533-YYH-KL, CFA533-TMI-KL, CFA533-YYH-KC, CFA533-TMI-KC, CFA533-YYH-KI
Date Issued:	June 6, 2010
Summary:	Keypad height change
Description:	Over the next 6 months or so, we will be transitioning to a keypad that is 1.5mm taller than the keypad currently shipping on these modules.
Reason:	We have found that in all cases that we are aware of, the keypad being 1.5mm taller will alleviate some customer difficulties.
Recommendation:	If you need the keypad to remain the same height for your application, please email support@crystalfontz.com so that we can set aside some of the shorter keypads for your company's application.
Availability:	~0-6 months.
Price Change:	None.

Part Change Notice #10280: Firmware change

Products Affected:	CFA635-YYE-KS, CFA635-TMF-KS, CFA635-TFE-KS, CFA635-TMF-KL, CFA635-TFE-KL, CFA635-TFE-KU, CFA635-YYE-KL, XES635BK-TFE-KU, XES635BK-TMF-KU, XES635BK-YYE-KU, CFA635-TMF-KU, CFA635-YYE-KU
Date Issued:	April 10, 2010
Summary:	Firmware change
Description:	Firmware / reset circuit change from v1.4 to v1.6
Reason:	To make LCD module less sensitive to supply variations
Impact:	Range checking on command 0 is corrected. Parameter checking on command 20 is corrected. Module will return "CFA635:h1.1,v1.6" for command 1. Customers who have customized part numbers will not be affected by this change unless they contact Crystalfontz to have their part definition changed.
Availability:	2010/05/01
Price Change:	N/A

20x4 Serial Character LCD

Part Number: CFA635-TFE-KL

Product Variations

Physical Characteristics

Optical Characteristics

Electrical Specifications

Environmental

Electronics

Part Change Notice

Subscribe to Part Change Notices by email or RSS

Part Change Notice #10658: Deprecation of "Drive Bay Kit Configurator" / New part numbers for drive bay kits.

Part Change Notice #10406: Supporting firmware for the reactivation of the CFA635 family of modules.

Part Change Notice #10405: Reactivation of the CFA635 family of modules with 1v2 hardware and supporting firmware.

Product Update #10377: CFA635 to CFA735 Migration

Part Change Notice #10365: End of Life announcement: CFA635 family of Intelligent Modules.

Part Change Notice #10282: Keypad height change

Part Change Notice #10280: Firmware change

LCD Software

User Forum

Tech Support

Glass Type/Glass Color	FSTN/Light Gray
Polarizer	Transflective
View Direction	12 o'clock
Sunlight Readable	Yes

Backlight Color	White
Backlight Type	LED
Mode	Positive
Foreground Color	Dark
Background Color	Light Gray