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.

Product Variants

Details40x2 Character LCD Module40x2 Character LCD Module
4-bit Parallel,8-bit Parallel, White on Blue
DetailsYellow 40x2 Character Standard LCDYellow 40x2 Character Standard LCD
4-bit Parallel,8-bit Parallel, Dark on Yellow-Green
  • square_foot Physical Characteristics

    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
  • visibility Optical Characteristics

    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
  • electric_bolt Electrical Specification

    Electrical Specifications

    Module Connector Pitch 0.1mm
  • nature Enviromental


    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%
  • cable Electronics


    Controller Documents Sitronix ST7066U
    Dot Matrix LCD Controller/Driver
    Sitronix ST7066U

    Sitronix ST7066U
    Dot Matrix LCD Controller/Driver
    Interface 4-bit Parallel, 8-bit Parallel
  • picture_as_pdf Datasheets
  • download Files and Downloads

Part Change Notice

Subscribe to Part Change Notices by email Email subscription for changes to CFAH4002A-TFH-JT or RSS RSS feed for changes to CFAH4002A-TFH-JT
  • text_snippet
    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
  • text_snippet
    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.