MCP23S18 Microchip Technology, MCP23S18 Datasheet
MCP23S18
Manufacturer Part Number
MCP23S18
Description
16-Bit I/O Expander
Manufacturer
Microchip Technology
Datasheet
1.MCP23S18.pdf
(56 pages)
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Features
• 16-bit remote bidirectional I/O port:
• Open-drain outputs:
• High-speed I
• High-speed SPI interface: (MCP23S18)
• Single hardware address pin: (MCP23018)
• Configurable interrupt output pins:
Block Diagram
© 2008 Microchip Technology Inc.
- I/O pins default to input
- 5.5V tolerant
- 25 mA sink capable (per pin)
- 400 mA total
- 100 kHz
- 400 kHz
- 3.4 MHz
- 10 MHz: 2.7V ≤ V
- Voltage input to allow up to eight devices on
- Configurable as active-high, active-low or
the bus
open-drain
16-Bit I/O Expander with Open-Drain Outputs
2
C™ interface: (MCP23018)
RESET
ADDR
SCK
INTB
SDA
INTA
SCL
SO
CS
SI
DD ≤
5.5V
Multi-bit
Decode
Interrupt
Logic
SPI
I
2
MCP23018/MCP23S18
C
MCP23018
MCP23S18
Configuration/
Serializer/
Deserializer
Registers
Control
Control
8
• Configurable interrupt source:
• Polarity inversion register to configure the polarity
• External reset input
• Low standby current:
• Operating voltage:
Packages
28-pin PDIP (300 mil)
28-pin SOIC (300 mil)
24-pin SSOP (MCP23018 only)
24-pin QFN (4x4 [mm])
- Interrupt-on-change from configured defaults
of the input port data
- 1 µA (-40°C ≤ T
- 6 µA (+85°C ≤ T
- 1.8V to 5.5V
or pin change
16
Open-drain
A
A
GPIO
GPIO
≤ +85°C)
≤ +125°C)
DS22103A-page 1
GPA7
GPA6
GPA5
GPA4
GPA3
GPA2
GPA1
GPA0
GPB7
GPB6
GPB5
GPB4
GPB3
GPB2
GPB1
GPB0
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