Datasheet

PCA9538A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 28 September 2012 3 of 37
NXP Semiconductors
PCA9538A
Low-voltage 8-bit I
2
C-bus 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 PCA9538A
PCA9538A
POWER-ON
RESET
002aah416
INPUT
FILTER
SCL
SDA
V
DD
P0
V
SS
8-bit
write pulse
read pulse
P2
P1
P3
LP
FILTER
V
DD
INT
RESET
A0
A1
P4
P6
P5
P7
I
2
C-BUS/SMBus
CONTROL
INPUT/
OUTPUT
PORTS