PCA9557 datasheet(2/26 Pages) NXP

Part #	PCA9557

Description	8-bit I2C-bus and SMBus I/O port with reset

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Manufacturer	NXP [NXP Semiconductors]

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PCA9557

Product data sheet

Rev. 06 — 11 June 2008

2 of 26

NXP Semiconductors

PCA9557

8-bit I2C-bus and SMBus I/O port with reset

3.

Ordering information

3.1 Ordering options

4.

Block diagram

Table 1.

Ordering information

Type number

Package

Name

Description

Version

PCA9557D

SO16

plastic small outline package; 16 leads;

body width 3.9 mm

SOT109-1

PCA9557PW

TSSOP16

plastic thin shrink small outline package; 16 leads;

body width 4.4 mm

SOT403-1

PCA9557BS

HVQFN16

plastic thermal enhanced very thin quad ﬂat package;

no leads; 16 terminals; body 4

× 4 × 0.85 mm

SOT629-1

Table 2.

Ordering options

Type number

Topside mark

Temperature range

PCA9557D

Tamb = −40 °C to +85 °C

PCA9557PW

PCA9557

Tamb = −40 °C to +85 °C

PCA9557BS

9557

Tamb = −40 °C to +85 °C

Fig 1.

Block diagram of PCA9557

PCA9557

POWER-ON

RESET

002aad275

I2C-BUS/SMBus

CONTROL

INPUT

FILTER

SCL

SDA

VDD

INPUT/

OUTPUT

PORTS

IO0

VSS

8-bit

write pulse

read pulse

IO2

IO4

IO6

IO1

IO3

IO5

IO7

A0

A1

A2

RESET

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