16-digit digital tube driver and keyboard control chip CH453


CH453 is a 16-digit digital tube display driver and keyboard scan control chip. CH453 has built-in clock oscillator circuit, which can dynamically drive 16-digit digital tube or 128 LED tubes; It can also perform 64-key keyboard scanning; CH453 exchanges data with a single-chip microcomputer through a 2-wire serial interface


  • Built-in current drive stage, segment current is not less than 15mA, word current is not less than 80mA.
  • Dynamic display scan control, direct drive 16-digit digital tube or 128 LED Luminous tubes.
  • Internal current limit, 3 levels of brightness control are provided by the duty cycle setting.
  • Built-in 64-key keyboard controller based on 8×8 matrix keyboard scan.
  • Provide an active low keyboard interrupt, A button release flag is provided for querying the button to be pressed and released.
  • High speed 2-wire serial interface, clock speeds from 0 to 2MHz, compatible with two-wire I2C bus, saving pins.
  • Built-in clock oscillating circuit, no need to provide external clock or external oscillating components, more anti-interference.
  • Supports low-power sleep, saves power, can be woken up by a button or wake up by a command operation.
  • Package form: SDIP28 and SOP28.

relation files

file name file content
CH452DS1.PDF CH452 datasheet. CH452 can be used for 64 LEDs or 8×8 segment digital tube drive and 64-key keyboard scanning control, simplifying the workload of MCU.
CH450DS1.PDF CH450 datasheet. CH450 is used for driver of 48 LEDs or 6 digital tubes and for 48-key keyboard scan control, compatible with high-speed two-wire interface.
CH454DS1.PDF CH454 datasheet. CH454 is used for display driver of 16-segment LED displays or 8 alphanumeric displays and for keyboard scan control, supports 17 segments x 7 digital tubes, 16 segments x 8 digital tubes and 8 segments x 16 digital tubes.
CH456DS1.PDF CH456 datasheet. CH456 is used for 16 digital tubes display drive and 64-key keyboard scanning. CH456 supports 2-wire serial interface, and is compatible with IIC, simplifying the workload of MCU.
CH423DS1.PDF CH423 datasheet. A remote I/O expander with 2-wire serial interface, used for 16 digital tube display or I/O expansion applications through two wires. The input terminal is a two-wire interface compatible with I2C, and the output terminal is an 8-bit bidirectional input/output port and a 16-bit high-current output port.