TCA9555 Datasheet, PDF (4/32 Pages) Texas Instruments – LOW VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

TCA9555
SCPS200A – JULY 2009 – REVISED JULY 2009 .............................................................................................................................................................. www.ti.com
TCA9555
1
INT
LOGIC DIAGRAM (POSITIVE LOGIC)
LP Filter
Interrupt
Logic
21
A0
2
A1
3
A2
22
SCL
23
SDA
Input
Filter
I²C Bus
Control
Shift
Register
16 Bits
I/O
Port
P07-P00
P17-P10
24
V_CC
GND
12
Power-On
Reset
A. Pin numbers shown are for the PW package.
B. All I/Os are set to inputs at reset.
Write Pulse
Read Pulse
4
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