9557 View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

9557

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

NXP Semiconductors. 

NXP Semiconductors

PCA9557

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

SDA

tBUF

SCL

tr

tLOW

tHD;STA

P

S

tHD;DAT

tf

tHIGH

tSU;DAT

Fig 21. Definition of timing on the I2C-bus

tHD;STA

tSP

tSU;STA

Sr

tSU;STO

P

002aaa986

START

SCL

ACK or read cycle

SDA

30 %

RESET 50 %

IOn

trec(rst)

Fig 22. Definition of RESET timing

trst

50 %

tw(rst)

50 %

trst

50 %

I/O configured

as inputs

002aad289

PCA9557

Product data sheet

Rev. 06 — 11 June 2008

© NXP B.V. 2008. All rights reserved.

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