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REMOTE 16-BIT I C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT
2
SCPS121C – JANUARY 2005 – REVISED OCTOBER 2006
TERMINAL FUNCTIONS
NO.
DB, DBQ, DGV,
DW, PW, AND
RHL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
RGE
22
23
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
NAME
FUNCTION
INT
A1
A2
P00
P01
P02
P03
P04
P05
P06
P07
GND
P10
P11
P12
P13
P14
P15
P16
P17
A0
SCL
SDA
V
CC
Interrupt output. Connect to V
CC
through a pullup resistor.
Address input 1. Connect directly to V
CC
or ground. Pullup resistors are not needed.
Address input 2. Connect directly to V
CC
or ground. Pullup resistors are not needed.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
Ground
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
P-port input/output. Push-pull design structure.
Address input 0. Connect directly to V
CC
or ground. Pullup resistors are not needed.
Serial clock line. Connect to V
CC
through a pullup resistor
Serial data line. Connect to V
CC
through a pullup resistor.
Supply voltage
3
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