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PCA9555DB Datasheet(PDF) 22 Page - Texas Instruments

Part # PCA9555DB
Description  REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

PCA9555DB Datasheet(HTML) 22 Page - Texas Instruments

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APPLICATION INFORMATION
P00
P01
P02
P03
P04
P05
A2
A1
A0
A
B
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
VCC
VCC
VCC
(5 V)
Controlled Switch
(e.g., CBT Device)
GND
INT
SDA
SCL
10 kW
10 kW
10 kW
10 kW
2 kW
INT
Subsystem 1
(e.g., Temperature
Sensor)
Subsystem 2
(e.g., Counter)
PCA9555
SDA
SCL
INT
GND
Keypad
ALARM
RESET
ENABLE
Subsystem 3
(e.g., Alarm)
Master
Controller
4
5
6
7
8
9
10
11
13
14
15
16
17
18
19
20
22
23
1
3
2
21
12
24
VCC
PCA9555
SCPS131E – AUGUST 2005 – REVISED MAY 2008 ......................................................................................................................................................... www.ti.com
Figure 15 shows an application in which the PCA9555 can be used.
A.
Device address is configured as 0100100 for this example.
B.
P00, P02, and P03 are configured as outputs.
C.
P01, P04–P07, and P10–P17 are configured as inputs.
D.
Pin numbers shown are for DB, DBQ, DGV, DW, and PW packages.
Figure 15. Typical Application
22
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Copyright © 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): PCA9555


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