The TM1637 LED driver from Titan Micro Electronics is a CMOS display controller with keyboard scan, 8‑segment×6‑digit display, PWM brightness, two‑wire…
The TM1637 is a LED driver controller with a keyboard‑scan interface, intended for display panels in small appliances such as induction cookers and microwaves. It integrates an MCU digital interface, data latch, high‑voltage LED driver, and key‑scan circuitry in a DIP20 or SOP20 package.
The datasheet describes the pin configuration, command set, timing and electrical characteristics, and provides example firmware for 8051‑based MCUs. Features include an 8‑segment×6‑digit display mode, 8‑level PWM brightness control, two‑wire serial communication (CLK, DIO), built‑in 450 kHz RC oscillator, and on‑chip reset and auto‑dim functions. This manual is written in Chinese.
| Display mode | 8‑segment ×6‑digit |
|---|---|
| Brightness levels | 8 PWM duty‑cycle levels |
| Interface | Two‑wire serial (CLK, DIO) |
| Operating voltage | 4.5 V – 5.5 V |
| Oscillation frequency | 450 kHz |
| Maximum clock frequency | 500 kHz |
| Dynamic supply current (no load, display off) | 5 mA |
| Package | DIP20 / SOP20 |
It uses a two‑wire serial interface consisting of a clock (CLK) and a data I/O line (DIO).
The device provides eight PWM duty‑cycle levels for brightness adjustment.
The TM1637 can operate with a clock up to 500 kHz.
It is offered in DIP20 and SOP20 surface‑mount packages.