TCA9539_15 Datasheet, PDF (16/42 Pages) Texas Instruments – Low Voltage 16-Bit I2C and SMBus Low-Power I/O Expander

TCA9539
SCPS202B – OCTOBER 2009 – REVISED OCTOBER 2015
8.2 Functional Block Diagram
TCA9539
1
INT
LP Filter
21
A0
2
A1
22
SCL
23
SDA
Input
Filter
I²C Bus
Control
Interrupt
Logic
Shift
Register
16 Bits
I/O
Port
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P07-P00
P17-P10
3
RESET
24
V_CC
GND
12
Power-On
Reset
Write Pulse
Read Pulse
A. Pin numbers shown are for PW package.
B. All I/Os are set to inputs at reset.
Figure 22. Logic Diagram (Positive Logic)
16
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