MCP23009 Microchip Technology Inc., MCP23009 Datasheet - Page 4

• Manufacturer Part Number: MCP23009
• Description: 8-bit I/o Expander With Open-drain Outputs
• Manufacturer: Microchip Technology Inc.

MCP23009/MCP23S09
1.1
TABLE 1-1:
DS22121A-page 4
V
V
SCL
SDA
ADDR
RESET
INT
GP0
GP1
GP2
GP3
GP4
GP5
GP6
GP7
NC
EP
Name
DD
SS
Pin
Pin Descriptions
PDIP/
2, 16,
SOIC
18L
18
17
10
11
12
13
14
15
—
1
3
4
5
6
7
8
9
I
2
C PINOUT DESCRIPTION (MCP23009)
11,19,18
SSOP
2,10,
20L
20
12
13
14
15
16
17
1
3
4
5
6
7
8
9
Type
Pin
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
P
P
I
I
I
Power
Ground
Serial clock input
Hardware address pin allows up to 8 slave devices on the bus
Hardware reset
Interrupt output for port. Can be configured as active high, active low, or open-
drain.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
Not connected
Exposed Thermal Pad (EP). Do not electrically connect. Can connect to V
Serial data I/O
Standard Function
© 2008 Microchip Technology Inc.
SS
.