Datasheet

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PCF8575
REMOTE 16-BIT I
2
C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT
SCPS121D – JANUARY 2005 – REVISED APRIL 2007
TERMINAL FUNCTIONS
NO.
NAME FUNCTION
DB, DBQ, DGV,
RGE
DW, AND PW
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. Pullup resistors are not needed.
3 24 A2 Address input 2. Connect directly to V
CC
or ground. Pullup resistors are not needed.
4 1 P00 P-port input/output. Push-pull design structure.
5 2 P01 P-port input/output. Push-pull design structure.
6 3 P02 P-port input/output. Push-pull design structure.
7 4 P03 P-port input/output. Push-pull design structure.
8 5 P04 P-port input/output. Push-pull design structure.
9 6 P05 P-port input/output. Push-pull design structure.
10 7 P06 P-port input/output. Push-pull design structure.
11 8 P07 P-port input/output. Push-pull design structure.
12 9 GND Ground
13 10 P10 P-port input/output. Push-pull design structure.
14 11 P11 P-port input/output. Push-pull design structure.
15 12 P12 P-port input/output. Push-pull design structure.
16 13 P13 P-port input/output. Push-pull design structure.
17 14 P14 P-port input/output. Push-pull design structure.
18 15 P15 P-port input/output. Push-pull design structure.
19 16 P16 P-port input/output. Push-pull design structure.
20 17 P17 P-port input/output. Push-pull design structure.
21 18 A0 Address input 0. Connect directly to V
CC
or ground. Pullup resistors are not needed.
22 19 SCL Serial clock line. Connect to V
CC
through a pullup resistor
23 20 SDA Serial data line. Connect to V
CC
through a pullup resistor.
24 21 V
CC
Supply voltage
3
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