DESCRIPTION

The PCA9544 is a 1-of-4 bi-directional translating multiplexer, controlled via the I2C bus. The SCL/SDA upstream pair fans out to four SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register. Four interrupt inputs, one for each of the SCx/SDx downstream pair, are provided. One interrupt output, which acts as an AND of the four interrupt inputs, is provided. All I/O pins are 5 V tolerant.

FEATURES

•1-of-4 bi-directional translating multiplexer

•Channel selection via I2C bus

•Operating supply voltage 2.5 to 3.6 V

•Operating temperature range 0°C to 70°C

•Power-up with all multiplexer channels deselected

•3 address pins, allowing up to 8 devices on the I2C bus

•Low on resistance