Datasheet

PCA9538 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 7 — 26 November 2014 3 of 34
NXP Semiconductors
PCA9538
8-bit I
2
C-bus and SMBus low power I/O port with interrupt and reset
4. Block diagram
Remark: All I/Os are set to inputs at reset.
Fig 1. Block diagram of PCA9538
PCA9538
POWER-ON
RESET
002aae667
INPUT
FILTER
SCL
SDA
V
DD
IO0
V
SS
8-bit
write pulse
read pulse
IO2
IO1
IO3
LP
FILTER
V
DD
INT
RESET
A0
A1
IO4
IO6
IO5
IO7
I
2
C-BUS/SMBus
CONTROL
INPUT/
OUTPUT
PORTS