PCA9537 查看數據表（PDF） - Philips Electronics

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PCA9537

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

Philips Electronics 

Philips Semiconductors

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

with interrupt and reset

Product data sheet

PCA9537

PIN CONFIGURATION

I/O0 1

I/O1 2

I/O2 3

I/O3 4

VSS 5

10 VDD

9 SDA

8 SCL

7 INT

6 RESET

SW02182

Figure 1. Pin configuration

PIN DESCRIPTION

PIN

NUMBER

SYMBOL

1–4

I/O0–3

5

VSS

6

RESET

7

INT

8

SCL

9

SDA

10

VDD

FUNCTION

I/O0 to I/O3

Supply ground

Active LOW reset input

Interrupt output (open drain)

Serial clock line

Serial data line

Supply voltage

BLOCK DIAGRAM

SCL

SDA

VDD

RESET

VSS

PCA9537

INPUT

FILTER

POWER-ON

RESET

I2C/SMBUS

CONTROL

4-BIT

WRITE pulse

INPUT/

OUTPUT

PORTS

READ pulse

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

LP

FILTER

I/O0

I/O1

I/O2

I/O3

VCC

INT

SW02183

Figure 2. Block diagram

2004 Nov 29

3

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