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PCA9554ADGVR Datasheet(PDF) 22 Page - Texas Instruments

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Part # PCA9554ADGVR
Description  REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
PDF  33 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCA9554ADGVR Datasheet(HTML) 22 Page - Texas Instruments

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APPLICATION INFORMATION
A2
A1
SDA
SCL
INT
GND
P6
P0
P1
P2
P3
P4
P5
P7
INT
GND
VCC
VCC
(5 V)
VCC
10 kW
10 kW
10 kW
2 kW
Master
Controller
PCA9554A
INT
RESET
Subsystem 2
(e.g., Counter)
Subsystem 3
(e.g., Alarm System)
ALARM
Controlled Device
(e.g., CBT Device)
ENABLE
A
B
VCC
Subsystem 1
(e.g., Temperature Sensor)
SDA
SCL
A0
PCA9554A
REMOTE 8-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
SCPS127A – SEPTEMBER 2006 – REVISED FEBRUARY 2007
Figure 14 shows an application in which the PCA9554A can be used.
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
Ω pullup resistors to protect them from floating.
Figure 14. Typical Application
22
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