MCP23018-E/SP Microchip Integrated Circuit (Dual-In-Line Packages) In Stock

Name: MCP23018-E/SP
Brand: Microchip
SKU: MCP23018-E/SP
Availability: InStock

MCP23018-E/SP is a 16-bit I/O expander from Microchip with I2C interface up to 10 MHz clock, providing two 8-bit GPIO ports in a 28-pin SPDIP package for expanding microcontroller I/O in embedded systems.

ACTIVEIntegrated CircuitVerified Jun 2026

Package / Visual Reference

MCP23018-E/SPDual-In-Line Packages

Quick Facts

Manufacturer: Microchip
Package: Dual-In-Line Packages
Pin Count: 28
Lifecycle: ACTIVE
Datasheet: MCP23018-E/SP Datasheet PDF
Category: Integrated Circuit
Price: From $1.5400(MOQ 1)
Temp Range: -40.0°C to 125.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of MCP23018-E/SP?

16-bit bidirectional I/O expansion via I2C interface
Supports I2C clock frequencies up to 10 MHz
Two independent 8-bit GPIO ports with configurable direction
Interrupt output pins for event-driven I/O monitoring
28-pin SPDIP package for through-hole applications
Operating voltage range 1.8 V to 5.5 V

What is MCP23018-E/SP used for?

MCP23018-E/SP is commonly used in embedded systems that require additional digital I/O lines beyond what the host microcontroller provides, such as keypad scanning, LED matrix control, and relay driving. It is also suitable for industrial automation panels, display controllers, and IoT gateways where a 2-wire I2C bus must manage many digital outputs and inputs with minimal pin count.

What are the specifications of MCP23018-E/SP?

Pbfree Code	Yes
Manufacturer Package Code	SPDIP-28
Factory Lead Time	6Weeks
YTEOL	9
Clock Frequency-Max	10MHz
JESD-30 Code	R-PDIP-T28
JESD-609 Code	e3
Number of Bits	16
Number of I/O Lines	16
Number of Ports	2
Package Body Material	PLASTIC/EPOXY
Package Equivalence Code	DIP28,.3
Package Shape	RECTANGULAR
Package Style	IN-LINE
Qualification Status	Not Qualified
Supply Current-Max	1mA
Supply Voltage-Max	5.5V
Supply Voltage-Min	1.8V
Supply Voltage-Nom	5V
Surface Mount	NO
Technology	CMOS
Temperature Grade	AUTOMOTIVE
Terminal Finish	Matte Tin (Sn)
Terminal Form	THROUGH-HOLE
Terminal Pitch	2.54mm
Terminal Position	DUAL
uPs/uCs/Peripheral ICs Type	PARALLEL IO PORT, GENERAL PURPOSE
Package	Dual-In-Line Packages

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8542.39.00.01
Country of Origin	Thailand

Where can I find the MCP23018-E/SP datasheet?

MCP23018-E/SP Datasheet Download

Official datasheet from Microchip

What are equivalent replacements for MCP23018-E/SP?

Compatible alternatives and drop-in replacements for MCP23018-E/SP:

suggested

suggested

suggested

MCP23017-E/SPMicrochip Technology Inc

Parallel I/O Port, 16-Bit, 16 I/O, CMOS, PDIP28

View Part →

MCP23017-I/SPMicrochip Technology Inc

Parallel I/O Port, 16-Bit, 16 I/O, CMOS, PDIP28

View Part →

MCP23016-I/SPMicrochip Technology Inc

16 BIT I/O EXPANDER

View Part →

Compare all alternatives & request quotes →

Frequently Asked Questions

How many additional I/O lines does MCP23018-E/SP add to an I2C-connected microcontroller?

MCP23018-E/SP adds 16 bidirectional I/O lines organized as two 8-bit ports, allowing a host MCU with limited GPIO to drive relays, LEDs, or keypads with just 2 I2C wires and a supply of 1.8 V to 5.5 V.

At what I2C clock speed can MCP23018-E/SP be addressed in a multi-device bus?

MCP23018-E/SP supports I2C clock frequencies up to 10 MHz, enabling fast register read/write cycles across multiple expanders sharing the same 2-wire bus in high-throughput control systems.

Can MCP23018-E/SP trigger an interrupt when a monitored input changes state?

Yes. MCP23018-E/SP has dedicated interrupt output pins that assert when any enabled input changes logic level, allowing the host MCU to respond to GPIO events without polling all 16 input lines continuously.

Is MCP23018-E/SP appropriate for a through-hole prototype board driving 16 LEDs from a 3.3 V system?

Yes. The 28-pin SPDIP package fits standard DIP sockets, and the device operates from 1.8 V to 5.5 V, making it straightforward to drive 16 LEDs through current-limiting resistors from a 3.3 V supply using the I2C bus.

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Reference Price (USD)

From $1.5400

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Qty.	Unit Price	Ext. Price
1+	$1.5731	$1.57
105+	$1.5600	$163.80
1000+	$1.5500	$1550.00
5000+	$1.5400	$7700.00

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Unit price: $1.5731 · Total: $1.57

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MCP23018-E/SP Microchip Integrated Circuit (Dual-In-Line Packages) In Stock

What are the key features of MCP23018-E/SP?

What is MCP23018-E/SP used for?

What are the specifications of MCP23018-E/SP?

Compliance & Regulatory

Where can I find the MCP23018-E/SP datasheet?

What are equivalent replacements for MCP23018-E/SP?

Frequently Asked Questions

How many additional I/O lines does MCP23018-E/SP add to an I2C-connected microcontroller?

At what I2C clock speed can MCP23018-E/SP be addressed in a multi-device bus?

Can MCP23018-E/SP trigger an interrupt when a monitored input changes state?

Is MCP23018-E/SP appropriate for a through-hole prototype board driving 16 LEDs from a 3.3 V system?

Related Guides

CDSOT23-SM712 RS-485 Interface Protection Design Guide

CR0805-FX-10R0ELF 10 Ohm 0805 Resistor Design Guide

How to Choose Würth Elektronik 150141-Series SMD Indicator LEDs

Molex 53398-0371 Selection Guide: Choosing a 3-Circuit Wire-to-Board Header

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About Microchip

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