PCA8574 Datasheet, PDF (3/27 Pages) NXP Semiconductors – Remote 8-bit I/O expander for I2C-bus with interrupt

NXP Semiconductors
PCA8574/74A
Remote 8-bit I/O expander for I²C-bus with interrupt
write pulse
data from Shift Register
power-on reset
DQ
FF
CI
S
I_trt(pu)
I_OH
100 µA
I_OL
V_DD
P0 to P7
V_SS
read pulse
data to Shift Register
DQ
FF
CI
S
to interrupt logic
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Fig 2. Simplified schematic diagram of P0 to P7
6. Pinning information
6.1 Pinning
PCA8574N
PCA8574AN
AD0 1
AD1 2
AD2 3
P0 4
P1 5
P2 6
P3 7
V_SS 8
16 V_DD
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9 P4
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Fig 3. Pin configuration for DIP16
AD0 1
AD1 2
AD2 3
P0 4
P1 5
P2 6
P3 7
V_SS 8
PCA8574D
PCA8574AD
16 V_DD
15 SDA
14 SCL
13 INT
12 P7
11 P6
10 P5
9 P4
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Fig 4. Pin configuration for SO16
PCA8574_PCA8574A_2
Product data sheet
Rev. 02 — 14 May 2007
© NXP B.V. 2007. All rights reserved.
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