MCP23009 Microchip Technology Inc., MCP23009 Datasheet - Page 5

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

TABLE 1-1:
© 2008 Microchip Technology Inc.
V
V
CS
SCK
SI
SO
RESET
INT
GP0
GP1
GP2
GP3
GP4
GP5
GP6
GP7
NC
EP
Name
DD
SS
Pin
PDIP/
SOIC
2, 17
18L
18
10
11
12
13
14
15
16
—
1
3
4
5
6
7
8
9
SPI PINOUT DESCRIPTION (MCP23S09)
QFN
16L
10
11
12
13
14
15
16
17
—
3
1
4
2
5
6
7
8
9
Type
Pin
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
—
O
O
P
P
I
I
I
I
Power (high current capable)
Ground (high current capable)
Chip select
Serial clock input
Serial data input
Serial data out
Hardware reset (must be externally biased)
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
MCP23009/MCP23S09
Standard Function
DS22121A-page 5
SS
.