PCA9545B datasheet(3/28 Pages) NXP

Part #	PCA9545B

Description	4-channel I2C-bus switch with interrupt logic and reset

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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3 / 28 page

PCA9545A_45B_45C_7

Product data sheet

Rev. 07 — 19 June 2009

3 of 28

NXP Semiconductors

PCA9545A/45B/45C

4-channel I2C-bus switch with interrupt logic and reset

4.

Block diagram

Fig 1.

Block diagram of PCA9545A/45B/45C

SWITCH CONTROL LOGIC

PCA9545A/PCA9545B/PCA9545C

POWER-ON

RESET

002aab168

SC0

SC1

SC2

SC3

SD0

SD1

SD2

SD3

VSS

VDD

RESET

I2C-BUS

CONTROL

INPUT

FILTER

SCL

SDA

A0

A1

INTERRUPT LOGIC

INT0

to

INT3

INT

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