24x2 Character LCD FSTN Transflective - MCU(Please contact us for volume need)
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- 📉 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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24x2 Character LCD FSTN Transflective - MCU(Please contact us for volume need)
- 💹 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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24×2 Character LCD FSTN Transflective – MCU
DM-LCD2402-438 is a 24-character by 2-line FSTN positive transflective LCD module for embedded display interfaces. The module uses the ST7066U controller IC and a 6800-series MPU parallel interface for MCU-based character display integration.
The module is specified with a 5.0V logic supply, 1/16 duty drive, 6:00 view direction, white LED backlight, and a 118.0 × 36.0 × 13.6 mm maximum module outline. The transflective construction supports readability under ambient light, while the white LED backlight assists viewing in low-light environments.
Verified Technical Specifications
All parameters below are based on the DM-LCD2402-438 datasheet and the ST7066U controller documentation. Use these values for display selection, mechanical layout, interface review, and sample evaluation.
| Parameter | Specification |
|---|---|
| Product Model | DM-LCD2402-438 |
| Display Format | 24 characters × 2 lines |
| Display Mode | FSTN Positive, Transflective |
| Module Dimension | 118.0 × 36.0 × 13.6 mm (MAX) |
| Visible Area | 94.5(W) × 16.0(H) mm, based on the mechanical drawing |
| Active Area | 88.3(W) × 11.5(H) mm, based on the mechanical drawing |
| Controller IC | ST7066U |
| Interface | 6800 Series MPU Parallel Interface; 4-bit or 8-bit mode through ST7066U function set |
| Power Supply (VDD) | 5.0V typical (4.5V to 5.5V range) |
| Digital Operation 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 |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Weight | 57.0 g |
FSTN Transflective Display Technology
Three design characteristics define the DM-LCD2402-438 module and help engineers evaluate its fit for MCU-based character display products.
FSTN Positive Transflective Mode
The Film Super-Twisted Nematic (FSTN) positive transflective display supports readable character output under ambient light and backlight illumination. The transflective structure uses ambient light in brighter environments and transmits the white LED backlight in lower-light environments.
Character Controller and Font Support
The ST7066U controller supports 5 × 8 and 5 × 11 dot matrix character formats, 4-bit or 8-bit microprocessor interface operation, and CGRAM custom-character creation. For two-line character LCD operation, the controller documentation specifies a 1/16 duty configuration with 5 × 8 dot characters.
6:00 View Direction with 1/16 Duty
The module is specified with a 6:00 viewing direction and 1/16 duty drive. The optical table specifies view angles of 30° top, 60° bottom, 45° left, and 45° right for sample and enclosure viewing-angle review.
Optical and Electrical Performance
The values below provide reference data for contrast review, response-time review, logic-current budgeting, and LED backlight-current budgeting during sample evaluation.
Pin Configuration and Interface Details
The module uses a standard 16-pin interface for 6800-series MPU parallel communication. Pin assignments, logic levels, and initialization timing should be verified before PCB layout.
| Pin | Symbol | Description |
|---|---|---|
| 1 | VSS | Ground |
| 2 | VDD | Supply voltage for logic |
| 3 | VO | Operating voltage for LCD; variable contrast adjustment |
| 4 | RS | H: Data, L: Instruction code |
| 5 | R/W | H: Read, L: Write |
| 6 | E | Chip enable signal |
| 7 | DB0 | Data bus line |
| 8 | DB1 | Data bus line |
| 9 | DB2 | Data bus line |
| 10 | DB3 | Data bus line |
| 11 | DB4 | Data bus line |
| 12 | DB5 | Data bus line |
| 13 | DB6 | Data bus line |
| 14 | DB7 | Data bus line |
| 15 | A | Backlight supply (+) |
| 16 | K | Backlight supply (-) |
6800 MPU Interface
Bus modes: 8-bit or 4-bit parallel operation through the ST7066U Function Set instruction.
Control signals: RS for register select, R/W for read/write, and E for enable.
Data bus: DB0–DB7 are available in 8-bit mode; DB4–DB7 are used in 4-bit mode.
Pin layout: The mechanical drawing shows a 16-pin through-hole pad layout with 2.54 mm pitch.
Timing Parameters (Write)
Enable cycle time: 1200 ns min
Enable pulse width: 140 ns min
Address setup time: 0 ns min
Address hold time: 10 ns min
Data setup time: 40 ns min
Data hold time: 10 ns min
Enable rise/fall time: 25 ns max
Industry Applications
The DM-LCD2402-438 module can be evaluated for embedded products requiring a wider 24-character line format, 2-line character output, and 6800-series MPU parallel interface.
Industrial Control Panels
For equipment interfaces that need longer 24-character status strings, menu labels, or two-line operating messages within the specified temperature range.
Measurement Instruments
For bench or embedded instruments where MCU-driven character output, low digital operation current, and white LED backlight visibility are required.
MCU-Based Equipment
For embedded designs using a 6800-series MPU parallel interface and ST7066U instruction set in 4-bit or 8-bit communication mode.
Reliability Test Conditions
The test conditions below help engineering teams review environmental tolerance before sample evaluation and product design. Function tests are conducted after 4 hours of storage at normal temperature and humidity after removal from the test chamber.
High Temp Storage
80°C for 200 hours
Low Temp Storage
-30°C for 200 hours
High Temp Operation
70°C for 200 hours
Low Temp Operation
-20°C for 200 hours
Humidity Operation
60°C, 90% RH for 96 hours
Thermal Shock
-20°C to +70°C, 10 cycles
Vibration Test
Total fixed amplitude: 1.5mm; 10–55 Hz; X/Y/Z directions, 16 min each
ESD Test
VS = 800V, RS = 1.5 kΩ, CS = 100 pF, 1 time
Engineering Notes
The following items should be reviewed before PCB layout, sample evaluation, and product integration. Confirm final requirements with the datasheet and the DisplayModule team before volume ordering.
Contrast Adjustment
The VO pin requires an external LCD operating-voltage adjustment path. Confirm the target VO setting during sample evaluation because contrast depends on drive condition, temperature, and viewing angle.
Interface Mode Selection
The ST7066U Function Set instruction selects 8-bit or 4-bit MPU interface mode. In 4-bit mode, data is transferred in two nibbles through DB4–DB7.
Backlight Drive
The white LED backlight is connected through pins 15 (A, anode) and 16 (K, cathode). The datasheet specifies 3.5V typical and 32 mA typical, with 40 mA maximum current. Confirm current-limiting requirements for the final circuit.
Initialization Sequence
Follow the instruction-based initialization sequence specified for 8-bit or 4-bit mode. Check the busy flag before sending subsequent instructions when R/W read operation is available; otherwise apply sufficient fixed delays according to instruction timing requirements.
View Direction and Mounting
The module is specified with a 6:00 view direction. Confirm the mounting orientation in the product enclosure to match the intended viewing angle.
Sample and Volume Review
Contact DisplayModule to confirm sample availability, lead time, MOQ, packing method, lifecycle status, and customization scope before committing to a project timeline.
Frequently Asked Questions
What controller IC does the module use?
The DM-LCD2402-438 uses the ST7066U controller IC. The module uses a 6800-series MPU parallel interface for MCU-based character display control.
What interface modes are supported?
The ST7066U supports 8-bit and 4-bit MPU interface operation. In 4-bit mode, data is transferred through DB4–DB7 in two nibbles.
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 digital operation current is 1.2 mA typical at VDD = 5.0V. The white LED backlight is specified at 3.5V typical and 32 mA typical.
Does the module include touch?
No touch panel or touch controller is specified in the provided product datasheet. Confirm any touch or cover-lens requirement with DisplayModule before ordering.
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. Review the reliability test conditions during sample evaluation.
How can I get technical support or samples?
Download the datasheet and controller documentation below. For sample availability, lead time, MOQ, packing method, and customization scope, contact the DisplayModule team before volume planning.
Download Official Documents
Download the DM-LCD2402-438 datasheet for electrical characteristics, optical data, timing parameters, pin descriptions, instruction tables, initialization sequences, reliability test conditions, and mechanical drawing. The ST7066U controller documentation provides additional controller-level instruction and memory reference.