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  Microchip Technology Semiconductor Electronic Components Datasheet  


MCP23018

16-Bit I/O Expander



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MCP23018 pdf
MCP23018/MCP23S18
16-Bit I/O Expander with Open-Drain Outputs
Features
• 16-bit remote bidirectional I/O port:
- I/O pins default to input
• Open-drain outputs:
- 5.5V tolerant
- 25 mA sink capable (per pin)
- 400 mA total
• High-speed I2C™ interface: (MCP23018)
- 100 kHz
- 400 kHz
- 3.4 MHz
• High-speed SPI interface: (MCP23S18)
- 10 MHz: 2.7V VDD 5.5V
• Single hardware address pin: (MCP23018)
- 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
• 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
Packages
28-pin PDIP (300 mil)
28-pin SOIC (300 mil)
24-pin SSOP (MCP23018 only)
24-pin QFN (4x4 [mm])
CS
SCK
SI
SO
MCP23S18
SPI
SCL
SDA
MCP23018
I2C
Serializer/
Deserializer
www.DataSheet4U.com
ADDR
RESET
INTA
INTB
Multi-bit
Decode
Interrupt
Logic
Control
8
Configuration/
Control
Registers
Open-drain
GPIO
16
GPIO
GPB7
GPB6
GPB5
GPB4
GPB3
GPB2
GPB1
GPB0
GPA7
GPA6
GPA5
GPA4
GPA3
GPA2
GPA1
GPA0
© 2008 Microchip Technology Inc.
DS22103A-page 1



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MCP23018 pdf
MCP23018/MCP23S18
Package Types:
MCP23018
VSS
NC
GPB0
GPB1
GPB2
GPB3
GPB4
GPB5
GPB6
GPB7
VDD
SCL
SDA
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PDIP/SOIC
28 NC
27 GPA7
26 GPA6
25 GPA5
24 GPA4
23 GPA3
22 GPA2
21 GPA1
20 GPA0
19 INTA
18 INTB
17 NC
16 RESET
15 ADDR
VSS
GPB0
GPB1
GPB2
GPB3
GPB4
GPB5
GPB6
GPB7
VDD
SCL
SDA
1
2
3
4
5
6
7
8
9
10
11
12
SSOP
24 GPA7
23 GPA6
22 GPA5
21 GPA4
20 GPA3
19 GPA2
18 GPA1
17 GPA0
16 INTA
15 INTB
14 RESET
13 ADDR
QFN
GPB1 1
GPB2 2
GPB3 3
GPB4 4
GPB5 5
GPB6 6
18 GPA3
17 GPA2
EP
25 16 GPA1
15 GPA0
14 INTA
13 INTB
www.DataSheet4U.com
DS22103A-page 2
© 2008 Microchip Technology Inc.



Part Number MCP23018
Description 16-Bit I/O Expander
Maker Microchip Technology - Microchip Technology
Total Page 30 Pages
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MCP23018 pdf
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