CH422 - LED Nixie Tube Display Driver and I/O Extension Chip

CH422 Datasheet Preview — Preview of CH422 PDF

Datasheet Details

Part number	CH422
Manufacturer	ETC
File Size	221.62 KB
Description	LED Nixie Tube Display Driver and I/O Extension Chip
Datasheet	CH422-ETC.pdf

CH422 Product details

Description

Positive power, continuous current not less than 100mA Common ground, continuous current not less than 100mA Segment drive of LED nixie tube, active at high level Bidirectional input and output, built-in weak pull-up resistor Word drive of LED nixie tube, active at low level General purpose output, optional open-drain output, active at low level Data input and output of two-wire serial interface, built-in pull-up resistor Data clock of two-wire serial interface 5. Functional Specification 5.1.

Features

Dynamic display scanning control, direct drive of 4-bit LED nixie tubes or 32 LEDs.
Built-in current driving stage, segment current driving capacity not less than 15mA, output word current not less than 100mA.
Built-in clock oscillator circuit, no need to provide external clock or external oscillator components, more anti-interference.
8 general-purpose I/O pins, GPIOs, and 4 general-purpose output pins, GPOs, are extended remotely through a two-wire serial interface.

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Published: Apr 19, 2025 |