PCA9545APW,118

多路复用开关 IC I2C SWITCH 4CH

General description

The PCA9545APW,118 PCA9545A/45B/45C is a quad bidirectional translating switch controlled via the

I 2C-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 and benefits PCA9545APW

 1-of-4 bidirectional translating switches

 I 2C-bus 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

 Alternate address versions A, B and C allow up to a total of 12 devices on the bus for

larger systems or to resolve address conflicts

 Channel selection via I2C-bus, in any combination

 Power-up with all switch 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

 5 V tolerant Inputs PCA9545APW

 0 Hz to 400 kHz clock frequency

 ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per

JESD22-C101

 Latch-up protection exceeds 100 mA per JESD78

 Three packages offered: SO20, TSSOP20, and HVQFN20

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