PCA9547 8-Channel I2C Bus Multiplexer

PCA9547 8-Channel I2C Bus Multiplexer

The PCA9547 is an octal bidirectional translating multiplexer controlled by the I2C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Only one SCx/SDx channel can be selected at a time, determined by the contents of the programmable control register. The device powers u.

Features

 1-of-8 bidirectional translating multiplexer
 I2C-bus interface logic; compatible with SMBus standards
 Active LOW RESET input
 3 address pins allowing up to 8 devices on the I2C-bus
 Channel selection via I2C-bus, one channel at a time
 Power-up with all channels deselected except Channel 0 which is connected
 Low Ron multiplexers
 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 frequen.