PCA9542A - NXP Semiconductors

PCA9542A 2-channel I2C-bus multiplexer and interrupt logic

The PCA9542A is a 1-of-2 bidirectional translating multiplexer, controlled via the I2C-bus. The SCL/SDA upstream pair fans out to two 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. Two interrupt inputs, INT0 and INT1, one for each of the SCx/SDx downstrea.

Features

I I I I I I I I I I I I I I I I 1-of-2 bidirectional translating multiplexer I2C-bus interface logic; compatible with SMBus 2 active LOW interrupt inputs (INT0, INT1) Active LOW interrupt output (INT) 3 address pins allowing up to 8 devices on the I2C-bus Channel selection via I2C-bus Powers up with all multiplexer channels deselected Low Ron switches Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses No glitch on power-up Supports hot insertion Low standby current Operating power supply voltage range of 2.3 V to 5.5 V 5 V tolerant inputs 0 Hz to 400 kHz clock frequency.