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TCA9554A Datasheet(PDF) 3 Page - Texas Instruments

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Part # TCA9554A
Description  LOW VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TCA9554A Datasheet(HTML) 3 Page - Texas Instruments

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TCA9554A
www.ti.com
SCPS196 – DECEMBER 2010
Table 1. TERMINAL FUNCTIONS
NO.
NAME
DESCRIPTION
TSSOP (PW)
mQFN (RSV)
1
15
A0
Address input. Connect directly to VCC or ground.
2
16
A1
Address input. Connect directly to VCC or ground.
3
1
A2
Address input. Connect directly to VCC or ground.
P-port input/output. Push-pull design structure. At power-on, P0 is
4
2
P0
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P1 is
5
3
P1
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P2 is
6
4
P2
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P3 is
7
5
P3
configured as an input.
8
6
GND
Ground
P-port input/output. Push-pull design structure. At power-on, P4 is
9
7
P4
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P5 is
10
8
P5
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P6 is
11
9
P6
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P7 is
12
10
P7
configured as an input.
13
11
INT
Interrupt output. Connect to VCC through a pullup resistor.
14
12
SCL
Serial clock bus. Connect to VCC through a pullup resistor.
15
13
SDA
Serial data bus. Connect to VCC through a pullup resistor.
16
14
VCC
Supply voltage
Copyright © 2010, Texas Instruments Incorporated
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