PCA9674APW datasheet(3/34 Pages) PHILIPS

Part #	PCA9674APW

Description	Remote 8-bit I/O expander for Fm I2C-bus with interrupt

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Manufacturer	PHILIPS [NXP Semiconductors]

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3 / 34 page

PCA9674_PCA9674A_2

Product data sheet

Rev. 02 — 12 October 2006

3 of 34

NXP Semiconductors

PCA9674/74A

Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt

5.

Block diagram

Fig 1.

Block diagram of PCA9674/74A

Fig 2.

Simpliﬁed schematic diagram of P0 to P7

002aac108

INT

I2C-BUS

CONTROL

INTERRUPT

LOGIC

PCA9674

PCA9674A

LP FILTER

AD0

AD1

AD2

INPUT

FILTER

SHIFT

REGISTER

SDA

SCL

8 BITS

write pulse

read pulse

POWER-ON

RESET

VDD

VSS

I/O

PORT

P0 to P7

002aac109

write pulse

read pulse

D

CI

S

FF

Q

power-on reset

data from Shift Register

Itrt(pu)

100

µA

IOH

IOL

VDD

P0 to P7

VSS

D

CI

S

FF

Q

data to Shift Register

to interrupt logic

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PCA9674APW Datasheet(PDF) 3 Page - NXP Semiconductors

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