TM1638

Display board using a TM1638

TM1638 is an IC dedicated to LED (light emitting diode display) drive control and equipped with a keypad scan interface.

Open Drain

The TM1638 board require a 5V supply voltage. The 3 data lines STB, CLK and DIO all have a 10 kOhm pull-up resistor.

Because of this, the module can be safely driven from a STM32 MCU using "Open Drain" output.

Open Drain simulation

Miscellaneous Links

• TM1638 Datasheet
• TM1638 LED&Key Module
• TM1629 Datasheet