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| TCA9554A Datasheet, PDF (24/33 Pages) Texas Instruments – LOW VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER | |||
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TCA9554A
SCPS196 â DECEMBER 2010
APPLICATION INFORMATION
Figure 14 shows an application in which the TCA9554A can be used.
VCC
(5 V)
VCC
10 k
SDA
Master
Controller
SCL
INT
10 k 10 k
VCC
SDA
SCL
INT
2k
P0
P1
P2
GND
P3
TCA9554A
P4
P5
A2
P6
A1
P7
A0
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Subsystem 1
(e.g., Temperature Sensor)
INT
RESET
Subsystem 2
(e.g., Counter)
A
ENABLE
B
Controlled Device
(e.g., CBT Device)
GND
ALARM
Subsystem 3
(e.g., Alarm System)
VCC
A. Device address is configured as 0111000 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 have internal 100-k⦠pullup resistors to protect them from floating.
Figure 14. Typical Application
24
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Product Folder Link(s): TCA9554A
Copyright © 2010, Texas Instruments Incorporated
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