SMS0301C is a standard digital pen segment type LCD display module, which has features such as wide voltage working range, low power consumption, and simple LED backlight. It is widely used in handheld instruments and meters.
This manual describes the SMS0301C LCD display module, which can show three numeric digits and six segment indicators. It highlights low power consumption, LED backlight, and a three‑wire serial interface for easy connection to an MCU.
Key sections include the module’s technical parameters, signal definitions, physical dimensions, and a mapping table for segment control. The document also provides wiring details and recommended operating conditions. This manual is written in Chinese.
| Display capacity | 3 digits + 6 segment indicators |
|---|---|
| Operating voltage | 2.7 V – 5.5 V |
| Backlight voltage | 4.2 V |
| Operating current | 10 µA |
| Backlight current | 20 nW |
| Character height | 9.4 mm |
| Relative humidity limit | < 85 % |
| Operating temperature | -20 °C to +e0 °C |
| Storage temperature | -30 °C to +70 °C |
| Interface type | Three‑wire serial (type A) |
It can display three numeric digits and six segment indicators.
The module operates from 2.7 V to 5.5 V, and the LED backlight runs at 4.2 V.
It uses a three‑wire serial interface (type A) with signals LOAD, QK, Di, VSS, OOM, VDD and LED+.