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PCA9554DB Datasheet(PDF) 21 Page - Texas Instruments

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Part # PCA9554DB
Description  SMBus I/O Expander With Interrupt Output
PDF  34 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

PCA9554DB Datasheet(HTML) 21 Page - Texas Instruments

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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
100 kW
(y3)
Master
Controller
PCA9554
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
PCA9554
www.ti.com
SCPS128C – JULY 2006 – REVISED JUNE 2014
9 Application And Implementation
9.1 Typical Application
Figure 28 shows an application in which the PCA9554 can be used.
A.
Device address is configured as 0100000 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 and have internal 100-k
Ω pullup resistors to protect them from floating.
Figure 28. Typical Application
Copyright © 2006–2014, Texas Instruments Incorporated
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