16x2 Character LCD STN Transflective - MCU
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16x2 Character LCD STN 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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16×2 Character LCD STN Transflective – MCU
DM-LCD1602-422 is a 16-character by 2-line transflective character LCD module designed for embedded MCU applications. It integrates an ST7066U controller and supports a 6800-series MPU parallel interface in 4-bit or 8-bit mode, providing a straightforward display solution for industrial controls, instruments, embedded devices, and other text-based HMI applications.
The DM-LCD1602-422 operates from a 5V logic supply and features an 84.0 × 44.0 mm footprint, 13.5 mm module height, 6:00 viewing direction, FSTN positive transflective LCD structure, and white LED backlight for clear character readability in varied lighting conditions.
Verified Technical Specifications
The specifications below summarize the key DM-LCD1602-422 parameters for display selection, PCB layout planning, and embedded-system integration.
| Parameter | Specification |
|---|---|
| Product Model | DM-LCD1602-422 |
| Display Format | 16 characters × 2 lines |
| Display Mode | FSTN Positive, Transflective |
| Module Dimension | 84.0 × 44.0 × 13.5 mm |
| Controller IC | ST7066U |
| Interface | 6800 Series MPU Parallel Interface (4-bit or 8-bit mode) |
| Power Supply (VDD) | 5.0V typical (4.5V to 5.5V range) |
| Supply Current (IDD) | 1.2 mA typical (1.0 to 1.5 mA) at VDD = 5.0V |
| View Direction | 6:00 |
| Duty | 1/16 |
| Backlight | White LED, 3.5V typical (3.4 to 3.6V), 32 mA typical (40 mA max) |
| Input Voltage Low (VIL) | VSS to 0.6V |
| Input Voltage High (VIH) | 0.7 × VDD to VDD |
| Contrast Ratio | 5 (Typ) |
| Response Time | 300 ms (Typ), 400 ms (Max) at 25°C |
| Luminance (without LCD) | 620 cd/m² (Typ), 496 cd/m² (Min) |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Weight | 37.1 g |
Transflective Character LCD Technology
Three design characteristics define the DM-LCD1602-422 module and its suitability for embedded character display applications.
FSTN Positive Transflective Mode
The FSTN positive transflective display is designed for clear character output under both ambient light and backlight illumination. Transflective construction reflects ambient light for ambient-light readability while transmitting the white LED backlight for low-light environments.
Built-in Character Generator ROM
The ST7066U controller integrates a character generator ROM supporting 5 × 8 dot font format for 2-line display mode and 5 × 11 dot font format in 1-line mode. Custom characters can be created using the CGRAM area.
6:00 View Direction with 1/16 Duty
The DM-LCD1602-422 is specified with a 6:00 viewing direction (bottom view) and 1/16 duty drive. Its view angles are 30° top, 60° bottom, 45° left, and 45° right for clear character readability in typical embedded display applications.
Optical and Electrical Performance
The data below provides engineers with reference values for brightness planning, power budgeting, and display comparison during sample evaluation.
Pin Configuration and Interface Details
The module uses a standard 16-pin interface for 6800-series MPU parallel communication, with pin assignments and logic levels provided for PCB layout planning.
16-Pin Interface Definition
6800 MPU Interface
Bus modes: 8-bit or 4-bit parallel (DL bit in Function Set)
Control signals: RS, R/W, E
Data bus: DB0–DB7 (DB4–DB7 in 4-bit mode)
Instruction timing reference: fosc = 270 kHz
Write Timing Parameters
Enable cycle time: 1200 ns min
Enable pulse width: 140 ns min
Data setup / hold: 40 ns / 10 ns min
Enable rise/fall: 25 ns max
Industry Applications
The DM-LCD1602-422 module is designed for embedded systems requiring compact character display output with an FSTN positive transflective LCD, white LED backlight, and 6800-series MPU interface.
Reliability Test Conditions
The reliability conditions below summarize environmental endurance tests for storage, operation, humidity, temperature cycling, vibration, and ESD performance. Function tests are conducted after 4 hours of storage at normal temperature and humidity following removal from the test chamber.
| Test Item | Content | Condition |
|---|---|---|
| High Temp Storage | Endurance test at high storage temperature | 80°C, 200 hrs |
| Low Temp Storage | Endurance test at low storage temperature | -30°C, 200 hrs |
| High Temp Operation | Electric stress and thermal stress endurance | 70°C, 200 hrs |
| Low Temp Operation | Electric stress under low temperature | -20°C, 200 hrs |
| Humidity Operation | High temp and high humidity under no-load | 60°C, 90% RH, 96 hrs |
| Thermal Shock | 10 cycles of temperature shock | -20°C to +70°C, 10 cycles |
| Vibration Test | Vibration during transport and use | 1.5mm, 10–55Hz, X/Y/Z 16 min |
| ESD Test | Electric stress to terminal | VS=800V, RS=1.5kΩ, CS=100pF |
Integration Guidance
The following integration points outline contrast control, interface mode, initialization, viewing direction, and backlight drive for embedded-system design.
Contrast Adjustment
The VO pin (pin 3) is used for LCD contrast control through an external adjustment circuit.
Interface Mode
8-bit or 4-bit mode via Function Set (DL bit). In 4-bit mode, data transfers via DB4–DB7 in two nibbles.
Backlight Drive
For DM-LCD1602-422, the white LED backlight uses pins 15 (A) and 16 (K) at 3.5V typ, 32 mA typ (40 mA max). Current limiting is required in the backlight drive circuit.
Initialization
The ST7066U initialization sequence supports 8-bit or 4-bit mode. Instruction timing is referenced at fosc = 270 kHz, with busy-flag checking available after initialization when applicable.
View Direction
6:00 view direction (bottom view) supports bottom-view mounting orientations.
Mechanical Fit
The compact 84.0 × 44.0 × 13.5 mm module profile supports standard 16×2 character-display integration in embedded equipment.
Sample & Volume
Contact DisplayModule for sample availability, lead time, MOQ, packing method, and customization scope.
Frequently Asked Questions
What controller IC does the module use?
The DM-LCD1602-422 uses the ST7066U controller IC, which supports 6800-series MPU parallel interface in 8-bit or 4-bit mode and includes a built-in character generator ROM.
What interface modes are supported?
The module supports 8-bit and 4-bit 6800-series MPU parallel interface modes, selectable via the Function Set instruction (DL bit). In 4-bit mode, data is transferred via DB4 through DB7.
What is the power supply requirement?
The logic supply voltage (VDD) is 5.0V typical, with an operating range of 4.5V to 5.5V. The typical logic supply current is 1.2 mA at 5V. For DM-LCD1602-422, the white LED backlight is 3.5V typical at 32 mA typical and 40 mA max.
What is the display format and font?
The module displays 16 characters on 2 lines using a 5 × 8 dot font format. The ST7066U controller also supports a 5 × 11 dot font format in 1-line mode.
What is the operating temperature range?
The operating temperature range is -20°C to +70°C. The storage temperature range is -30°C to +80°C, with reliability test conditions provided for environmental endurance reference.
How can I get technical support or samples?
The DM-LCD1602-422 datasheet, the related DM-LCD1602-421 datasheet, and the ST7066U controller documentation are available for download below. For sample availability, lead time, MOQ, and customization, contact the DisplayModule team.
Download Datasheets
Download the DM-LCD1602-422 datasheet for the main FSTN positive transflective white-backlight version, the related DM-LCD1602-421 datasheet, and the ST7066U controller documentation for command, timing, interface, instruction, and initialization reference.