pca8574 NXP Semiconductors, pca8574 Datasheet - Page 16
pca8574
Manufacturer Part Number
pca8574
Description
Pca8574/pca8574a Remote 8-bit I/o Expander For I2c-bus With Interrupt
Manufacturer
NXP Semiconductors
Datasheet
1.PCA8574.pdf
(27 pages)
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NXP Semiconductors
PCA8574_PCA8574A_2
Product data sheet
Fig 17. I
Rise and fall times refer to V
2
C-bus timing diagram
protocol
SDA
SCL
t
SU;STA
t
BUF
condition
START
(S)
t
HD;STA
IL
and V
t
LOW
t
r
IH
.
MSB
bit 7
(A7)
t
HIGH
Rev. 02 — 14 May 2007
t
SU;DAT
t
f
1
/f
bit 6
(A6)
SCL
t
HD;DAT
Remote 8-bit I/O expander for I
(R/W)
bit 0
t
VD;DAT
acknowledge
(A)
t
VD;ACK
condition
STOP
PCA8574/74A
(P)
t
SU;STO
002aab175
2
C-bus with interrupt
© NXP B.V. 2007. All rights reserved.
16 of 27
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