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TCA9554A Datasheet, PDF (3/33 Pages) Texas Instruments – LOW VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER
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TCA9554A
www.ti.com
NO.
TSSOP (PW)
1
2
3
mQFN (RSV)
15
16
1
4
2
5
3
6
4
7
5
8
6
9
7
10
8
11
9
12
10
13
11
14
12
15
13
16
14
Table 1. TERMINAL FUNCTIONS
SCPS196 – DECEMBER 2010
NAME
A0
A1
A2
P0
P1
P2
P3
GND
P4
P5
P6
P7
INT
SCL
SDA
VCC
DESCRIPTION
Address input. Connect directly to VCC or ground.
Address input. Connect directly to VCC or ground.
Address input. Connect directly to VCC or ground.
P-port input/output. Push-pull design structure. At power-on, P0 is
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P1 is
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P2 is
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P3 is
configured as an input.
Ground
P-port input/output. Push-pull design structure. At power-on, P4 is
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P5 is
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P6 is
configured as an input.
P-port input/output. Push-pull design structure. At power-on, P7 is
configured as an input.
Interrupt output. Connect to VCC through a pullup resistor.
Serial clock bus. Connect to VCC through a pullup resistor.
Serial data bus. Connect to VCC through a pullup resistor.
Supply voltage
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