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GPIO Expander ICs - BU1852GUW

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
BU1852GUW-E2 Active VBGA035W040 2500 2500 Taping Yes
Supply Voltage(Min.)[V] 1.65
Supply Voltage(Max.)[V] 3.6
Num. of GPIO port 20
Serial I/F I2CBUS, Original
Power ON Reset Yes
Num. of Slave Address 2
Output Format CMOS output, OPEN Drain output
Operating Temperature (Min.)[°C] -30
Operating Temperature (Max.)[°C] 85
  • ・Monitor up to 96 matrix keys.
    ・Under 3μA Stand-by Current
    ・Built-in Power On Reset.
    ・Ghost key rejection.
    ・Keyscan / GPIO selectable
    ・3 volt tolerant Input
Technical Data
Application Note

Thermal Resistance