TCA9535 Datasheet, PDF (22/32 Pages) Texas Instruments – LOW VOLTAGE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

TCA9535
SCPS201A – AUGUST 2009 – REVISED SEPTEMBER 2009........................................................................................................................................... www.ti.com
APPLICATION INFORMATION
Figure 15 shows an application in which the TCA9535 can be used.
V_CC
(5 V)
V_CC
SCL
Master
Controller _SDA
10 kΩ
(X 4)
INT
GND
24
V_DD
22
SCL
23
SDA
1
INT
2 kΩ
4
P00
5
P01
P02 ⁶
7
P03
8
P04
9
P05
TCA9535
3 _A2
2 _A1
21 _A0
P06 ¹⁰
P07 ¹¹
P10 ¹³
P11 ¹⁴
P12 ¹⁵
P13 ¹⁶
P14 ¹⁷
P15 ¹⁸
P16 ¹⁹
GND P17 ²⁰
12
100 kΩ
(X 3)
10 kΩ
(X 5)
Subsystem 1
(e.g., Temperature
Sensor)
INT
Subsystem 2
(e.g., Counter)
RESET
A
ENABLE
B
Keypad
V_CC
Controlled Switch
(e.g., CBT Device)
ALARM
Subsystem 3
(e.g., Alarm)
A. Device address is configured as 0100100 for this example.
B. P00, P02, and P03 are configured as outputs.
C. P01, P04–P07, and P10–P17 are configured as inputs.
D. Pin numbers shown are for the PW package.
Figure 15. Typical Application
22
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