GPIO ICs

ROHM GPIO expander series are useful especially for the application that is in short of IO ports. We have mainly two kinds of GPIO expander.
One is equipped with GPIO ports that you can widely use such as control signals.The other is exclusively for Qwerty key encoding. This series can communicate with CPU through a few lines and expand IO ports to 8, 16(corresponding to Qwerty keyboard), and 20 ports.
GPIO expander series are also equipped with some practical functions, such as interrupt output, built-in power on reset, 3V tolerant input, and NMOS open-drain output.

Part No.

Supply Voltage
(V)

Num. of GPIO port

Serial I/F

Power ON Reset

Num. of Slave Address

Output format

Package

RoHS

BU1851GUW

2.20 to 3.60

-

Original

Yes

-

-

VBGA035W040

Yes

BU1850MUV

1.65 to 3.60

8

I2CBUS

Yes

2

CMOS output,OPEN Drain output

VQFN016V3030

Yes

NEW
BU1852GUW

1.65 to 3.60

20

I2CBUS, Original

Yes

2

CMOS output,OPEN Drain output

VBGA035W040

Yes

BU8272GUW

1.65 to 3.45

20

2-wire

-

2

CMOS output

VBGA035W040

Yes