CH422 Datasheet 1 LED Nixie Tube Display Driver and I/O Extension Chip CH422 Datasheet Version: 2 1.
Overview CH422 chip can be used for LED nixie tube display driver or I/O extension.
CH422 has a built-in clock oscillation circuit, which can dynamically drive 4-bit LED nixie tubes or 32 LEDs.
For I/O extension, CH422 can provide 8 bidirectional I/O pins and 4 general-purpose output pins.
CH422 exchanges data with MCU through a two-wire serial interface.
SCL MCU, etc.
SDA CH422 LED nixie t