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GPIO Expander ICs - BU8272GUW

GPIO expander is useful especially for the application that is in short of IO ports. It can 1. Control GPIO output states by I2C write protocol. 2. Know GPIO input states by I2C read protocol Furthermore,it has the interrupt function that can release CPU from polling the registers in the GPIO expander. GPIO expander are also equipped with Built-in power on reset, 3V tolerant input,and NMOS open-drain output.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BU8272GUW-E2 Active VBGA035W040 2500 2500 Taping Yes
Supply Voltage(Min.)[V] 1.65
Supply Voltage(Max.)[V] 3.45
Num. of GPIO port 20
Serial I/F 2-wire
Power ON Reset -
Num. of Slave Address 2
Output Format CMOS output
Operating Temperature (Min.)[°C] -25
Operating Temperature (Max.)[°C] 85
  • ・400Kbps, 2-Wire serial interface
    ・Interrupt output
    ・20-bit General purpose input/output interface
        8-bit and 12-bit IO groups are designed for different power supply
        voltages from the device core voltage supply
Technical Data
Application Note

Thermal Resistance