PCA9544APW - NXP

PCA9544APW 4-channel I2C-bus multiplexer

The PCA9544A is a 1-of-4 bidirectional 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, INT0 to INT3, one for each of the SCx/SDx downstre.

Features

 1-of-4 bidirectional translating multiplexer
 I2C-bus interface logic; compatible with SMBus
 4 active LOW interrupt inputs
 Active LOW interrupt output
 3 address pins allowing up to 8 devices on the I2C-bus
 Channel selection via I2C-bus
 Power-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
 ESD protection exce.