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General description

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 up with Channel 0 connected, allowing immediate communication between the master and downstream devices on that channel.

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 frequency

ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101

Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

Packages offered: SO24, TSSOP24, HVQFN24