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PCA9554DB Datasheet(PDF) 22 Page - Texas Instruments

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Part # PCA9554DB
Description  REMOTE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
PDF  36 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCA9554DB 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
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
SCPS128B – JULY 2006 – REVISED AUGUST 2008 ........................................................................................................................................................ www.ti.com
Figure 14 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 14. Typical Application
22
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Copyright © 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): PCA9554
Not Recommended for New Designs



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