Datasheet

TCA9555
www.ti.com .............................................................................................................................................................. SCPS200A – JULY 2009 – REVISED JULY 2009
TERMINAL FUNCTIONS
NO.
NAME DESCRIPTION
TSSOP (PW) QFN (RTW)
1 22 INT Interrupt output. Connect to V
CC
through a pullup resistor.
2 23 A1 Address input 1. Connect directly to V
CC
or ground.
3 24 A2 Address input 2. Connect directly to V
CC
or ground.
P-port input/output. Push-pull design structure. At power on, P00 is
4 1 P00
configured as an input.
P-port input/output. Push-pull design structure. At power on, P01 is
5 2 P01
configured as an input.
P-port input/output. Push-pull design structure. At power on, P02 is
6 3 P02
configured as an input.
P-port input/output. Push-pull design structure. At power on, P03 is
7 4 P03
configured as an input.
P-port input/output. Push-pull design structure. At power on, P04 is
8 5 P04
configured as an input.
P-port input/output. Push-pull design structure. At power on, P05 is
9 6 P05
configured as an input.
P-port input/output. Push-pull design structure. At power on, P06 is
10 7 P06
configured as an input.
P-port input/output. Push-pull design structure. At power on, P07 is
11 8 P07
configured as an input.
12 9 GND Ground
P-port input/output. Push-pull design structure. At power on, P10 is
13 10 P10
configured as an input.
P-port input/output. Push-pull design structure. At power on, P11 is
14 11 P11
configured as an input.
P-port input/output. Push-pull design structure. At power on, P12 is
15 12 P12
configured as an input.
P-port input/output. Push-pull design structure. At power on, P13 is
16 13 P13
configured as an input.
P-port input/output. Push-pull design structure. At power on, P14 is
17 14 P14
configured as an input.
P-port input/output. Push-pull design structure. At power on, P15 is
18 15 P15
configured as an input.
P-port input/output. Push-pull design structure. At power on, P16 is
19 16 P16
configured as an input.
P-port input/output. Push-pull design structure. At power on, P17 is
20 17 P17
configured as an input.
21 18 A0 Address input 0. Connect directly to V
CC
or ground.
22 19 SCL Serial clock bus. Connect to V
CC
through a pullup resistor.
23 20 SDA Serial data bus. Connect to V
CC
through a pullup resistor.
24 21 V
CC
Supply voltage
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