USB LCD Displays
40x2 Character LCD Module
Part Number: CFAH4002A-TMI-JT
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.
Datasheet
Compliance Documents
TECHNICAL SPECS
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 |
| Pin Count | 16 |
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 |
Environmental
| 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% |
Electronics
| Controller Documents | Sitronix ST7066U ST7066U Dot Matrix LCD Controller/Driver Sitronix ST7066U |
| Interface | 4-bit Parallel, 8-bit Parallel |
Miscellaneous
| Nits | 75 |
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. |
Compatible Software:
