CH422 Datasheet | Unknown Manufacturer

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. CH422 LED nixie tube driver SEG7～SEG0 DIG3～DIG0 4-bit LED nixie tube or 32 LEDs SCL MCU, etc. CH422 I/O expansion IO7～IO0 OC3～OC0 8-bit input or 8-bit output 4-bit output Optional open drain 2. 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 15m A, output word current not less than 100m A. - Built-in clock oscillator circuit, no need to provide external clock or external oscillator ponents, 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. - 4 general-purpose output pins can choose push-pull output or open-drain output. - Support 3-5V supply voltage and low power sleep, can be awakened by input level change. - High speed two-wire serial interface, clock speed from 0 to 1MHz, patible with two-wire I2C bus, saving pins. - Adopt SOP16 lead-free package, patible with Ro HS. 3. Package CH422 Datasheet Package SOP16 Width of Plastic Pitch of Pin 3.9mm 150mil 1.27mm 50mil Instruction of Package Standard 16-pin patch Ordering Information CH422G 4. Pins Pin No. 14 Pin Name VCC Pin Type...