NXP Semiconductors
4. Block diagram
PCA9538A
Low-voltage 8-bit I2C-bus I/O port with interrupt and reset
A0
A1
SCL
SDA
VDD
RESET
INPUT
FILTER
POWER-ON
RESET
8-bit
I2C-BUS/SMBus
CONTROL
write pulse
read pulse
INPUT/
OUTPUT
PORTS
P0
P1
P2
P3
P4
P5
P6
P7
VDD
VSS
PCA9538A
LP
INT
FILTER
002aah416
Remark: All I/Os are set to inputs at reset.
Fig 1. Block diagram of PCA9538A
PCA9538A
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 28 September 2012
© NXP B.V. 2012. All rights reserved.
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