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HomeProductsIntegrated Circuits (ICs)Interface - I/O ExpandersMCP23018-E/SP
Microchip Technology
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See specifications for product details.

MCP23018-E/SP - Microchip Technology

Manufacturer Part Number
Microchip Technology
Allelco Part Number
ECAD Model
Parts Description
Detailed Description
28-DIP (0.300', 7.62mm)
Data sheet
Cylindrical Battery Holders.pdf
RoHs Status
ROHS3 Compliant
In stock: 21209

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MCP23018-E/SP Tech Specifications
Microchip Technology - MCP23018-E/SP technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - MCP23018-E/SP

Product Attribute Attribute Value  
Manufacturer Microchip Technology  
Voltage - Supply 1.8V ~ 5.5V  
Supplier Device Package 28-SPDIP  
Series -  
Package / Case 28-DIP (0.300', 7.62mm)  
Package Tube  
Output Type Open Drain  
Operating Temperature -40°C ~ 125°C  
Product Attribute Attribute Value  
Number of I/O 16  
Mounting Type Through Hole  
Interrupt Output Yes  
Interface I²C  
Features POR  
Current - Output Source/Sink 25mA  
Clock Frequency 3.4 MHz  
Base Product Number MCP23018  

Parts Introduction

Manufacturer Part Number



Microchip Technology


The MCP23018-E/SP is an integrated circuit designed for expanding I/O capabilities via the I2C interface.

Product Features and Performance

16-bit remote bidirectional I/O port

I2C serial interface

Interruption output for input change detection

Programmable Open-Drain outputs

Power-on Reset (POR)

Seamlessly integrates with most microcontrollers

Supports up to 3.4MHz I2C communication speeds

Product Advantages

High I/O expansion with minimal pin usage due to I2C interface

Flexible I/O configuration for versatile applications

Supports hot insertion

Strong source and sink current capabilities for driving LEDs or relays

Key Technical Parameters

Number of I/O: 16

Interface: I2C

Interrupt Output: Yes

Current - Output Source/Sink: 25mA

Clock Frequency: 3.4 MHz

Voltage - Supply: 1.8V to 5.5V

Operating Temperature range: -40°C to 125°C

Quality and Safety Features

Extended temperature range ensures reliability in extreme conditions

Built-in Power-on Reset enhances system stability

Robust through-hole mounting for secure solder connections


Compatible with various microcontrollers that support I2C

A 28-DIP package easily fits into standard PCB layouts

Application Areas

Industrial automation and control systems


Sensor interfaces

Home automation

Gaming devices

Product Lifecycle

Product Status: Active

The product is not nearing discontinuation

Replacements and upgrades are available

Several Key Reasons to Choose This Product

Increases I/O options without using additional microcontroller pins

Industrial-rated temperature range makes it versatile across different environments

Strong source/sink current capabilities ideal for direct peripheral interfacing

Ease of integration with existing I2C setups

Reliable performance from an established semiconductor manufacturer

Microchip's proven track record of long-term product support and availability

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology MCP23018-E/SP

Product Attribute MCP23018-E/SP MCP23017-E/SO MCP23016T-I/SO MCP23S08-E/SS
Part Number MCP23018-E/SP MCP23017-E/SO MCP23016T-I/SO MCP23S08-E/SS
Manufacturer Microchip Technology Microchip Technology Microchip Technology Microchip Technology
Operating Temperature -40°C ~ 125°C -40°C ~ 125°C -40°C ~ 85°C -40°C ~ 125°C
Clock Frequency 3.4 MHz 1.7 MHz 400 kHz 10 MHz
Base Product Number MCP23018 MCP23017 MCP23016 MCP23S08
Package / Case 28-DIP (0.300', 7.62mm) 28-SOIC (0.295', 7.50mm Width) 28-SOIC (0.295', 7.50mm Width) 20-SSOP (0.209", 5.30mm Width)
Supplier Device Package 28-SPDIP 28-SOIC 28-SOIC 20-SSOP
Series - - - -
Voltage - Supply 1.8V ~ 5.5V 1.8V ~ 5.5V 2V ~ 5.5V 1.8V ~ 5.5V
Current - Output Source/Sink 25mA 25mA 25mA 25mA
Interrupt Output Yes Yes Yes Yes
Interface I²C I²C I²C SPI
Output Type Open Drain Push-Pull Push-Pull Push-Pull
Package Tube Tube Tape & Reel (TR) Tube
Number of I/O 16 16 16 8
Mounting Type Through Hole Surface Mount Surface Mount Surface Mount

MCP23018-E/SP Datasheet PDF

Download MCP23018-E/SP pdf datasheets and Microchip Technology documentation for MCP23018-E/SP - Microchip Technology.

Cylindrical Battery Holders.pdf


Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Your Faithful Supply Chain Partner -

Contact us if you have any questions.

  1. Phone
    +00852 9146 4856

Certifications & Memberships

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Microchip Technology


Microchip Technology

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