
PCA9554_9554A
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NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 9 — 19 March 2013
15 of 35
NXP Semiconductors
PCA9554; PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
Fig 16. Definition of timing
tSP
tBUF
tHD;STA
P
S
tLOW
tr
tHD;DAT
tf
tHIGH
tSU;DAT
tSU;STA
Sr
tHD;STA
tSU;STO
SDA
SCL
002aaa986
0.7 × VDD
0.3 × VDD
0.7 × VDD
0.3 × VDD