20x2 Character LCD FSTN Transflective - MCU
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20x2 Character LCD FSTN Transflective - MCU
- 💹 Enjoy a 20% discount for orders over 500
- 📉 A 15% discount is available for orders ranging from 200 to 499
- 🎁 A 10% discount is available for orders ranging from 50 to 199
- 🎁 A 5% discount is available when ordering 10-49
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20×2 Character LCD FSTN Transflective Module with ST7066U Controller
DM-LCD2002-437 is a 20 characters × 2 lines FSTN positive transflective character LCD module for MCU-based equipment interfaces. It uses a 6800 Series MPU interface, ST7066U controller IC, 5.0 V logic supply, and white LED backlight.
The module outline is 146.0 × 43.0 × 13.7 mm maximum, with 6:00 viewing direction, 1/16 duty, and a 16-pin connection layout for parallel data and control signals.
Verified Technical Specifications
Key product values for display selection, PCB planning, enclosure review, and sample evaluation.
| Parameter | Specification |
|---|---|
| Product Model | DM-LCD2002-437 |
| Product Type | Character LCD module |
| Display Format | 20 characters × 2 lines |
| Display Mode | FSTN Positive, Transflective |
| Module Dimension | 146.0 × 43.0 × 13.7 mm maximum |
| Viewing Area | 123.0 × 23.0 mm |
| Active Area | 118.84 × 18.97 mm |
| View Direction | 6:00 o'clock |
| Duty | 1/16 |
| Controller IC | ST7066U |
| Interface | 6800 Series MPU Interface |
| Logic Supply Voltage | 4.5 V min., 5.0 V typ., 5.5 V max. |
| Supply Current | 1.0 mA min., 1.2 mA typ., 1.5 mA max. at VDD=5.0 V |
| Input Voltage | VIL: VSS to 0.6 V; VIH: 0.7VDD to VDD |
| Output Voltage | VOL: 0 to 0.4 V; VOH: 3.9 V to VDD |
| Backlight | White LED |
| Backlight Supply Voltage | 3.4 V min., 3.5 V typ., 3.6 V max. |
| Backlight Supply Current | 48 mA typ., 60 mA max. |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Weight | 83.8 g |
| Touch Panel | No touch panel specification is provided for this character LCD module. |
Optical and Electrical Details
The following values support display readability review, backlight planning, and electrical interface checks during sample evaluation.
Display Readability
FSTN positive transflective LCD construction, 6:00 viewing direction, and white LED backlight support fixed-format character readouts in equipment interfaces.
Viewing Angle
Top 30°, bottom 60°, left 45°, right 45°.
Response Time
Tr + Tf: 300 ms typical, 400 ms maximum at 25°C.
Contrast Ratio
CR: 5, as listed in the product datasheet.
Luminance Reference
Without LCD: 300 cd/m² min., 380 cd/m² typ.
Mechanical Data and Mounting Considerations
Use the module outline, viewing area, active area, 16-pin position, and mounting-hole information together when planning the enclosure window, PCB clearance, and front-panel opening.
Module Outline
The datasheet lists a maximum module dimension of 146.0 × 43.0 × 13.7 mm.
Display Window
The mechanical drawing shows a 123.0 × 23.0 mm viewing area and 118.84 × 18.97 mm active area.
Board Integration
The drawing identifies a 16-pin through-hole and pad area with 2.54 mm pitch. Confirm the final connector or soldering method before PCB release.
Pin Description and 6800 Series MPU Interface
16-Pin Parallel Signal Layout
The module pin list includes VSS, VDD, VO, RS, R/W, E, DB0 to DB7, A, and K. These pins support logic power, contrast adjustment, command/data selection, read/write control, enable timing, data transfer, and LED backlight supply.
The ST7066U controller supports both 4-bit and 8-bit MPU bus modes. In 4-bit mode, data is transferred using two 4-bit operations.
ST7066U Controller Information
Controller Function
The ST7066U is a dot-matrix LCD controller/driver for alphanumeric characters, Japanese kana characters, and symbols. It can be configured under the control of a 4-bit or 8-bit microprocessor.
Memory and Fonts
The controller documentation lists 80 × 8-bit display RAM, 13,200-bit character generator ROM for 240 character fonts, and 64 × 8-bit character generator RAM.
Supply Design Note
The ST7066U controller documentation lists 2.7 V to 5.5 V controller operation. For this module, use the module datasheet value: 4.5 V to 5.5 V logic supply, 5.0 V typical.
Reliability and Operating Conditions
These conditions are provided to support engineering review of temperature, humidity, thermal shock, vibration, and ESD tolerance during sample evaluation. Please refer to the official datasheet for detailed test methods and acceptance criteria.
Temperature Storage
High temperature storage: 80°C for 200 hours. Low temperature storage: -30°C for 200 hours.
Temperature Operation
High temperature operation: 70°C for 200 hours. Low temperature operation: -20°C for 200 hours.
Humidity and Shock
High temperature and humidity operation: 60°C, 90%RH for 96 hours under no-load condition excluding the polarizer. Thermal shock resistance: -20°C to 70°C, 10 cycles.
Vibration and Static Electricity
Vibration condition includes 10-55 Hz and three directions. Static electricity test condition lists VS=800 V, RS=1.5 kΩ, CS=100 pF, one time.
Engineering Notes Before Ordering
Initialization
The ST7066U documentation states that the busy flag indicates internal operation is being processed. Firmware should follow the official timing instructions.
Bus Width
The ST7066U function set allows 8-bit or 4-bit MPU bus mode. Choose the bus width according to available MCU pins and firmware timing requirements.
Contrast
The VO pin is used for contrast adjustment. Review the block diagram and contrast adjustment circuit before finalizing the PCB design.
Ordering Review
Confirm sample availability, bulk lead time, connector or soldering preference, display appearance, and customization scope before volume purchasing.
Common Questions
What interface does this 20×2 LCD module use?
It uses a 6800 Series MPU parallel interface. The pin list includes RS, R/W, E, and DB0 to DB7 data bus lines.
Can the module be driven in 4-bit mode?
The ST7066U controller documentation supports both 8-bit and 4-bit MPU bus modes.
What power supply should be used?
The module datasheet specifies 4.5 V to 5.5 V logic supply, with 5.0 V typical.
Is this a touch display?
No touch panel specification is provided for this character LCD module.
What should be checked before mechanical design?
Check the outline, viewing area, active area, mounting details, 16-pin position, and front-panel opening against the official mechanical drawing.
What applications can be evaluated?
Industrial control panels, instruments, metering equipment, embedded equipment interfaces, and test equipment readouts can be evaluated.
Download Official Documents
Download the product datasheet and the ST7066U controller documentation to confirm dimensions, pin description, electrical characteristics, optical data, controller functions, timing information, reliability conditions, and integration requirements.