This display is end-of-life. You might consider a different color 40x2 character display.

40x2 Parallel Character LCD

Part Number: CFAH4002A-TFH-JT

Standard 40x2 Character LCD – Dark On Light Gray

If you need to display a lot of information on your device, this extra wide LCD will do the job with an active area of 5.8-inches (147.50 millimeters). Like all transflective displays, the 5x8 character matrix on this 40 x 2 LCD screen can be read in direct sunlight, is good for typical office lighting, and is easy to read in dark locations. One of our customers bought a display in the CFAH4002A series to use in an environmental control system for irrigation management.

Key Features

  • 2 lines with 40 characters each, industry standard 40x2 form factor
  • The built-in alphanumeric set supports Japanese and English text
  • Built-in Sitronix ST7066U or compatible controller.
  • Sunlight readable
  • Adjust backlight contrast by using PWM (Pulse Width Modulation)

As with other standard character displays, the parallel interface communicates with your host using 4-bit or 8-bit mode. The built-in Sitronix ST7066U controller is compatible with the industry standard Hitachi HD44780 controller. Software written for the HD44780 should work without any changes. For controller details, see the Sitronix ST7066U datasheet on our website.

Our goal is to keep every product available as long as possible. We've sold the CFAH4002A series since 2008 and it is still going strong. With a white LED backlight, this FSTN (Film compensated Super-Twisted Neumatic) display module has a higher contrast ratio than the standard STN, resulting in superior sharpness and contrast. A simple current limiting resistor in line with the voltage source works well in most applications. The white LEDs do not demand a current source, although one may be used. For details, see the backlight section starting on page 22 of the datasheet.

Need more information? Our in-house Technical Support team will answer your interface and connection questions.


Physical Characteristics

Characters x Lines 40 x 2
Module Overall width height depth
millimeters 182 33.5 13.6
inches 7.165 1.319 0.535
PCB Outline width height depth
millimeters 182 33.5 13.6
inches 7.165 1.319 0.535
Diagonal Dimension 5.82"
Viewing Area width height
millimeters 154.4 16.5
inches 6.079 0.650
Active Area width height
millimeters 147.5 11.5
inches 5.807 0.453
Character Size width height
millimeters 3.2 5.55
inches 0.126 0.219
Character Pitch width height
millimeters 3.7 5.95
inches 0.146 0.234
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 98g

Optical Characteristics

Glass Type/Glass Color FSTN/Light Gray
Polarizer Transflective
View Direction 6 o'clock
Sunlight Readable Yes
Backlight Color White
Backlight Type LED
Mode Positive
Foreground Color Dark
Background Color Light Gray

Electrical Specifications

Module Connector Pitch 0.1mm


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%


Controller Documents Sitronix ST7066U
Dot Matrix LCD Controller/Driver
Interface 4-bit Parallel, 8-bit Parallel

Part Change Notice

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Product Update #10918: End-of-Life Notification

Products Affected: CFAG14432A-TMI-TT, CFAG12864F-YYH-TY, CFAH4002A-TFH-JT
Date Issued: January 10, 2018
Summary: End-of-Life Notification
Description: The parts listed have been assigned to End-of-Life Status.
Reason: The minimum order quantity for each of these parts has been increased to an unsustainable amount.
Recommendation: These parts should not be used for new designs.
Availability: When current stock is depleted, the parts will no longer be available.
Price Change: N/A

Product Update #10615: White LED backlight improvements: Less current, increased luminance.

Products Affected: CFAH4002A-TFH-JT, CFAH4002A-TMI-JT
Date Issued: September 26, 2014
Summary: White LED backlight improvements: Less current, increased luminance.
Description: Improvements to the white LED have resulted in less current with an increased luminance.

Old Specifications:
Typical Forward current of 60 mA at a forward voltage of 3.5v.
Maximum forward voltage of 3.9v.
Luminous intensity of 10 cd /m^2

New Specifications:
Typical Forward current of 48 mA at a forward voltage of 3.5v.
Maximum current of 75 mA
Minimum current of 43.2 mA
Maximum forward voltage of 3.6v
Minimum forward voltage of 3.4v
Luminous intensity of 133 to 167 cd /m^2 @ 48 mA

Revised datasheet to follow.
Reason: Improvements in white LED manufacturing have resulted in brighter, longer lasting LEDs that require less current. These improved LEDs have been designed into the backlight assembly of the CFAH4002A.
Impact: All white LED backlight based CFAH4002A products.
Recommendation: Review backlight driving circuits for white LED backlight CFAH4002A display modules and make the appropriate adjustments.
Availability: This update effects all currently shipping CFAH4002A displays based on the white LED backlight.
Price Change: There is no price change as a result of these improvements at this time.
For reference only. For design purposes, please use the specifications in the datasheet.