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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP23009 Datasheet

8-Bit I/O Expander

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MCP23009 pdf
MCP23009/MCP23S09
8-Bit I/O Expander with Open-Drain Outputs
Features:
• 8-Bit Remote Bidirectional I/O Port:
- I/O Pins Default to Input
• Open-Drain Outputs:
- 5.5V Tolerant
- 25 mA Sink Capable (per Pin)
- 200 mA Total
• High-Speed I2C™ Interface (MCP23009):
- 100 kHz
- 400 kHz
- 3.4 MHz
• High-Speed SPI Interface (MCP23S09):
- 10 MHz
• Single Hardware Address Pin (MCP23009):
- Voltage input to allow up to eight devices on
the bus
• Configurable Interrupt Output Pins:
- Configurable as active-high, active-low or
open-drain
Block Diagram
CS
SCK
SI
SO
MCP23S09
SPI
• Configurable Interrupt Source:
- Interrupt-on-Change from configured defaults
or pin change
• Polarity inversion register to configure the polarity
of the input port data
• External Reset Input
• Low Standby Current:
- 1 µA (-40°C TA +85°C)
- 6 µA (+85°C TA +125°C)
• Operating Voltage:
- 1.8V to 5.5V
• Available Packages:
- 16-Lead QFN (3x3x0.9 mm)
- 18-Lead PDIP (300 mil)
- 18-Lead SOIC (7.50 mm)
- 20-Lead SSOP (5.30 mm)
SCL
SDA
RESET
INT
ADDR
MCP23009
I2C™
Serializer/
Deserializer
Multi-Bit
Decode
Control
8
8
Configuration/
Control
Registers
GPIO
GP0
GP1
GP2
GP3
GP4
GP5
GP6
GP7
2009-2014 Microchip Technology Inc.
DS20002121C-page 1



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP23009 Datasheet

8-Bit I/O Expander

No Preview Available !

MCP23009 pdf
MCP23009/MCP23S09
Package Types
VDD
NC
SCL
SDA
ADDR
RESET
INT
GP0
GP1
1
2
3
4
5
6
7
8
9
MCP23009
PDIP, SOIC
18 VSS
17 NC
16 NC
15 GP7
14 GP6
13 GP5
12 GP4
11 GP3
10 GP2
MCP23009
3 x 3 QFN*
16 15 14 13
VSS 1
12 GP3
NC 2
VDD 3
SCL 4
EP 11 GP2
17 10 GP1
9 GP0
567 8
MCP23009
SSOP
VDD
NC
SCL
SDA
ADDR
RESET
INT
GP0
GP1
NC
1
2
3
4
5
6
7
8
9
10
20 VSS
19 NC
18 NC
17 GP7
16 GP6
15 GP5
14 GP4
13 GP3
12 GP2
11 NC
VDD
NC
CS
SCK
SI
SO
RESET
INT
GP0
1
2
3
4
5
6
7
8
9
MCP23S09
PDIP/SOIC
18 VSS
17 NC
16 GP7
15 GP6
14 GP5
13 GP4
12 GP3
11 GP2
10 GP1
MCP23S09
3 x 3 QFN*
16 15 14 13
VSS 1
12 GP3
SCK 2
VDD 3
CS 4
EP 11 GP2
17 10 GP1
9 GP0
567 8
* Includes Exposed Thermal Pad (EP); see Tables 1-1 and 1-2.
DS20002121C-page 2
2009-2014 Microchip Technology Inc.



  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP23009 Datasheet

8-Bit I/O Expander

No Preview Available !

MCP23009 pdf
MCP23009/MCP23S09
1.0 DEVICE OVERVIEW
The MCP23X09 device provides 8-bit, general purpose
parallel I/O expansion for I2C bus or SPI applications.
The two devices differ only in the serial interface.
• MCP23009 – I2C interface
• MCP23S09 – SPI interface
The MCP23X09 consists of multiple 8-bit configuration
registers for input, output and polarity selection. The
system master can enable the I/Os as either inputs or
outputs by writing the I/O configuration bits. The data
for each input or output is kept in the corresponding
input or output register. The polarity of the input port
register can be inverted with the polarity inversion
register. All registers can be read by the system master.
The interrupt output can be configured to activate
under two conditions (mutually exclusive):
1. When any input state differs from its
corresponding input port register state. This is
used to indicate to the system master that an
input state has changed.
2. When an input state differs from a
pre-configured register value (DEFVAL
register).
The Interrupt Capture register captures port values at
the time of the Interrupt, thereby saving the condition
that caused the Interrupt.
The Power-On Reset (POR) sets the registers to their
default values and initializes the device state machine.
The hardware address pin is used to determine the
device address.
2009-2014 Microchip Technology Inc.
DS20002121C-page 3




Part Number MCP23009
Description 8-Bit I/O Expander
Maker Microchip Technology
Total Page 30 Pages
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