The SMS0301B is a standard three‑digit numeric LCD display module with a wide operating voltage range, low power consumption and a simple three‑wire serial interface for MCU connection. It is intended for handheld instruments and includes an LED backlight.
The manual lists the module's electrical characteristics, physical dimensions, pin functions and address mapping, and points to an online reference page for additional information. This manual is written in Chinese.
| Display capacity | 3 digits |
|---|---|
| Operating voltage | 2.7~5.5 V |
| Backlight voltage | 4.2 V |
| Operating current (3.0 V) | 10 µA |
| Backlight current | 20 mA |
| Character height | 9.4 mm |
| Relative humidity (max) | <85 % |
| Operating temperature | -20 °C to +60 °C |
| Storage temperature | -30 °C to +70 °C |
| Display mode | Semi‑transparent, semi‑reflective positive display |
| Interface type | Three‑wire serial (type A) |
The module operates from 2.7 V to 5.5 V.
It can display three numeric digits.
It uses a three‑wire serial interface (type A).
The backlight operates at 4.2 V.