PCA9539
REMOTE 16-BIT I2C AND SMBus LOW-POWER I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
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SCPS130D–AUGUST 2005–REVISED MARCH 2007
APPLICATION INFORMATION
Figure 15 shows an application in which the PCA9539 can be used.
Subsystem 1
(e.g., Temperature
Sensor)
INT
V
CC
(5 V)
Subsystem 2
(e.g., Counter)
100 kW
24
2 kW
10 kW
10 kW 10 kW 10 kW
V
CC
V
CC
100 kW 100 kW
RESET
A
22
23
4
P00
SCL
SDA
INT
SCL
5
Master
P01
Controller
SDA
6
7
P02
P03
1
3
INT
GND
ENABLE
8
9
RESET
P04
P05
B
PCA9539
V
CC
10
Controlled Switch
(e.g., CBT Device)
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
11
13
14
15
16
17
18
19
20
2
ALARM
A1
A0
Keypad
Subsystem 3
(e.g., Alarm)
21
GND
12
A. Device address is configured as 1110100 for this example.
B. P00, P02, and P03 are configured as outputs.
C. P01 and P04 to P17 are configured as inputs.
D. Pin numbers shown are for DB, DBQ, DGV, DW, and PW packages.
Figure 15. Typical Application
22
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