PCA9558 查看數據表（PDF） - Philips Electronics

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产品描述 (功能)

生产厂家

PCA9558

8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM and 2 k bit EEPROM

Philips Electronics 

Philips Semiconductors

8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit

latched 6-bit I2C EEPROM and 2 k bit EEPROM

Product data

PCA9558

PIN DESCRIPTION

PIN NUMBER

SYMBOL

1

SCL

2

SDA

3

I/O_OUT_LOW

4

A0

5–9

MUX_IN A–E

10

GND

11–18

I/O[0–7]

19

MUX_SELECT

20–24

MUX_OUT E–A

25

NON_MUXED_OUT

26

MUX_OUT_LOW

27

WP

28

VDD

FUNCTION

Serial I2C bus clock

Serial bi-directional I2C bus data

Active-LOW control forces all GPIO to logic 0 outputs

A0 Address

External inputs to multiplexer

Ground

General purpose Input/Output 0 through 7 (open drain outputs)

Active-LOW Select of MUX_IN inputs or EEPROM contents for MUX_OUT outputs

Open drain multiplexed outputs

Open drain outputs from non-volatile memory

Active-LOW control forces all MUX outputs to logic 0

Active-HIGH EEPROM write protect

Power supply : +3.0 to +3.6 V

2002 May 24

3

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