Datasheet

PCA9675 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 2 — 3 October 2011 3 of 34
NXP Semiconductors
PCA9675
Remote 16-bit I/O expander for Fm+ I
2
C-bus with interrupt
5. Block diagram
Fig 1. Block diagram of PCA9675
Fig 2. Simplified schematic diagram of P00 to P17
002aab627
INT
I
2
C-BUS
CONTROL
INTERRUPT
LOGIC
PCA9675
LP FILTER
AD0
AD1
AD2
INPUT
FILTER
SHIFT
REGISTER
SDA
SCL
16 BITS
write pulse
read pulse
POWER-ON
RESET
V
DD
V
SS
I/O
PORT
P00 to P07
P10 to P17
002aab631
write pulse
read pulse
D
CI
S
FF
Q
power-on reset
data from Shift Register
I
trt(pu)
100 μA
I
OH
I
OL
V
DD
P00 to P07
P10 to P17
V
SS
D
CI
S
FF
Q
data to Shift Register
to interrupt logic