PCA9537 datasheet(3/17 Pages) PHILIPS

Part #	PCA9537

Description	4-bit I2C and SMBus low power I/O port with interrupt and reset

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Manufacturer	PHILIPS [NXP Semiconductors]

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Philips Semiconductors

Product data sheet

PCA9537

4-bit I2C and SMBus low power I/O port

with interrupt and reset

2004 Nov 29

3

PIN CONFIGURATION

1

2

3

4

56

7

8

9

10

SW02182

I/O0

I/O1

I/O2

I/O3

VSS

VDD

SDA

SCL

INT

RESET

Figure 1. Pin configuration

PIN DESCRIPTION

NUMBER

SYMBOL

FUNCTION

1–4

I/O0–3

I/O0 to I/O3

5

VSS

Supply ground

6

RESET

Active LOW reset input

7

INT

Interrupt output (open drain)

8

SCL

Serial clock line

9

SDA

Serial data line

10

VDD

Supply voltage

BLOCK DIAGRAM

POWER-ON

RESET

INPUT

FILTER

I2C/SMBUS

CONTROL

INPUT/

OUTPUT

PORTS

WRITE pulse

READ pulse

SCL

SDA

VDD

VSS

4-BIT

I/O0

I/O1

I/O2

I/O3

SW02183

NOTE: ALL I/Os ARE SET TO INPUTS AT RESET

VCC

INT

LP

FILTER

RESET

PCA9537

Figure 2. Block diagram

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