pca9557bs NXP Semiconductors, pca9557bs Datasheet - Page 17

• Manufacturer Part Number: pca9557bs
• Description: 8-bit I2c And Smbus I/0 Port With Reset
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9557_5
Product data sheet
Fig 21. Definition of timing on the I
Fig 22. Definition of RESET timing
SDA
SCL
RESET
P
SCL
SDA
IOn
t
BUF
50 %
S
t
HD;STA
t
LOW
START
30 %
t
rec(rst)
2
C-bus
t
t
r
HD;DAT
Rev. 05 — 12 September 2007
t
HIGH
t
f
t
SU;DAT
8-bit I
t
w(rst)
Sr
50 %
2
C-bus and SMBus I/O port with reset
ACK or read cycle
t
SU;STA
t
HD;STA
t
t
rst
rst
50 %
50 %
t
I/O configured
as inputs
SP
t
SU;STO
PCA9557
002aad289
© NXP B.V. 2007. All rights reserved.
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