DESCRIPTION

The PCA9545 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. Four interrupt inputs, INT0 to INT3, one for each of the downstream pairs, are provided. One interrupt output, INT, acts as an AND of the four interrupt inputs.

FEATURES

? 1-of-4 bi-directional translating switches

? I2C interface logic; compatible with SMBus standards

? 4 active low interrupt inputs

? Active low interrupt output

? Active low reset input

? 2 address pins allowing up to 4 devices on the I2C bus

? Channel selection via I2C bus, in any combination

? Power up with all switch channels deselected

? Low RDSON 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 stand-by current

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

? 5 V tolerant Inputs

? 0 to 400 kHz clock frequency

? ESD protection exceeds 2000 V HBM per JESD22-A114,

150 V MM per JESD22-A115 and 1000 V per JESD22-C101

? Latch-up testing is done to JESDEC Standard JESD78 which

exceeds 100 mA

? Package Offer: SO20, TSSOP20