PCA9674AD NXP [NXP Semiconductors], PCA9674AD Datasheet - Page 3
PCA9674AD
Manufacturer Part Number
PCA9674AD
Description
Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCA9674AD.pdf
(32 pages)
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NXP Semiconductors
5. Block diagram
PCA9674_PCA9674A_5
Product data sheet
Fig 1.
Fig 2.
SDA
AD0
AD1
AD2
SCL
V
V
data from Shift Register
INT
DD
SS
data to Shift Register
Block diagram of PCA9674/74A
Simplified schematic diagram of P0 to P7
power-on reset
PCA9674
PCA9674A
write pulse
read pulse
FILTER
INPUT
POWER-ON
RESET
Rev. 05 — 15 June 2009
INTERRUPT
Remote 8-bit I/O expander for Fm+ I
LOGIC
CONTROL
D
CI
I
2
C-BUS
FF
S
Q
D
CI
REGISTER
FF
write pulse
read pulse
S
SHIFT
Q
I
trt(pu)
LP FILTER
8 BITS
100 A
PCA9674/74A
I
I
OH
OL
PORT
I/O
002aac109
002aac108
2
C-bus with interrupt
© NXP B.V. 2009. All rights reserved.
V
P0 to P7
V
to interrupt logic
DD
SS
P0 to P7
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