Datasheet

APPLICATION INFORMATION
A1
A0
SDA
SCL
INT
GND
P6
P0
P1
P2
P3
P4
P5
P7
INT
GND
V
CC
V
CC
(5 V)
V
CC
10 kW 10 kW
10 kW 10 kW
2 kW
100 kW
(y3)
Master
Controller
PCA9538
INT
RESET
Subsystem 2
(e.g., counter)
Subsystem 3
(e.g., alarm system)
ALARM
Controlled Device
(e.g., CBT device)
ENABLE
A
B
V
CC
RESET RESET
Subsystem 1
(e.g., temperature sensor)
SDA
SCL
PCA9538
SCPS126E – SEPTEMBER 2006 – REVISED JUNE 2008 ................................................................................................................................................ www.ti.com
Figure 14 shows an application in which the PCA9538 can be used.
A. Device address is configured as 1110000 for this example.
B. P0, P2, and P3 are configured as outputs.
C. P1, P4, and P5 are configured as inputs.
D. P6 and P7 are not used and must be configured as outputs.
Figure 14. Typical Application
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