CH422
Digital Tube Display Driver and I/O Expansion Chip CH422
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SKU: KL-426-0003889
Category: Analog Switches / Multiplexers
About this item
Attribute | Value |
---|---|
Manufacturer | WCH(Jiangsu Qin Heng) |
Package | SOP16 |
Digital Tube | 4*8 |
Interface | 2-wire |
LED/segment LCD | 32/- |
Operating Voltage | 3.0V~5.3V |
Certification | RoHS |
Overview
The CH422 chip can be used for digital tube display drivers or I/O expansion. CH422 has built-in clock oscillation circuit, which can dynamically drive 4-digit digital tube or 32 LED light-emitting tubes. When CH422 is used for I/O expansion, it can provide 8 bidirectional input and output pins and 4 general-purpose output pins;CH422 exchanges data with a single-chip microcomputer through a 2-wire serial interface.
Features
- Dynamic display scan control, direct drive 4-digit digital tube or 32 LED tubes.
- Built-in current drive stage, the segment current drive capability is not less than 15mA, and the output word current is not less than 100mA.
- Built-in clock oscillating circuit, no need to provide external clock or external oscillating components, more anti-interference.
- 8 general-purpose input and output pins GPIO and 4 general-purpose output pin GPOs are remotely extended through a two-wire serial interface.
- Four general-purpose output pins can be selected for push-pull output or open-drain output.
- Supports 3V ~ 5V power supply voltage, supports low-power sleep, can be awakened by input level changes.
- High-speed 2-wire serial interface with clock speeds from 0 to 1MHz, compatible with two-wire I2C bus, saving pins.
- Available in SOP16 lead-free package, compatible with RoHS.
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