MCP23018 查看數據表（PDF） - Microchip Technology

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MCP23018

16-Bit I/O Expander with Open-Drain Outputs

Microchip Technology 

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

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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