General description

The PCA9546A is a quad bi-directional translating switch controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.

Features

■1-of-4 bi-directional translating switches

■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, in any combination

■Power-up with all switch channels deselected

■Low Ronswitches

■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 stand-by current

■Operating power supply voltage range of 2.3 V to 5.5 V

■5 V tolerant Inputs

■0 kHz 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

■Three packages offered: SO16, TSSOP16, and HVQFN16