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PCA9554ADGV Datasheet(PDF) 21 Page - Texas Instruments

Part # PCA9554ADGV
Description  PCA9554A Remote 8-Bit I2C and SMBus I/O Expander With Interrupt Output and Configuration Registers
PDF  42 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

PCA9554ADGV Datasheet(HTML) 21 Page - Texas Instruments

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9 Application Information Disclaimer
Note
Information in the following applications sections is not part of the TI component specification,
and TI does not warrant its accuracy or completeness. TI’s customers are responsible for
determining suitability of components for their purposes, as well as validating and testing their design
implementation to confirm system functionality.
9.1 Application Information
9.1.1 Typical Application
Figure 9-1 shows an application in which the PCA9554A can be used.
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
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-kΩ pullup resistors to protect them from floating.
Figure 9-1. Typical Application
www.ti.com
PCA9554A
SCPS127F – SEPTEMBER 2006 – REVISED MARCH 2021
Copyright © 2021 Texas Instruments Incorporated
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Product Folder Links: PCA9554A



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