40x2 Parallel Character LCD

Part Number: CFAH4002A-TMI-JT


Quantity Price
1 $14.97
10 $13.01
20 $12.55
50 $12.08
100 $11.90
200 $11.71
500 * $11.15
1000 * $10.00
* Contact us about potential lead times.

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40x2  Parallel Character LCD (CFAH4002A-TMI-JT)

Product Variants

4-bit Parallel / 8-bit Parallel


Standard 40x2 Character LCD – White On Blue

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). The 5x8 character matrix on this transmissive STN 40 x 2 LCD screen 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.
  • 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. For the white LED backlight, 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.


For reference only. For design purposes, please use the specifications in the datasheet.

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
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 STN/Blue
Polarizer Transmissive
View Direction 6 o'clock
Backlight Color White
Backlight Type LED
Mode Negative
Foreground Color White
Background Color Blue

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 Sitronix ST7066U
Interface 4-bit Parallel, 8-bit Parallel

*Suggest a Correction

Part Change Notice

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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.