Interface - I/O Expanders

.hide-partial { max-height: none; } .show-more { display: none; }

MCP23x17 I/O Expanders

Microchip Technology MCP23x17 I/O Expanders feature a 16-bit general-purpose parallel bi-directional I/O port with a high-speed I²C interface. These I/O expanders come with three hardware address pins that allow up to eight devices on the bus and configurable interrupt output pins. The hardware pins are used to determine the device address. The MCP23x17 expanders consist of multiple 8-bit configuration registers for input, output, and polarity selection. These MCP23x17 I/O expanders offer two interrupt pins, INTA and INTB, that will activate if either port causes an interrupt.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Results: 14

Applied Filters:

Series

Mounting Style

Package / Case

Interface Type

Supply Voltage - Min

Maximum Clock Frequency

Packaging

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017-E/ML
Microchip Technology
1: S/6.77
47,289In Stock

Mfr. Part #
MCP23017-E/ML

Mouser Part #
579-MCP23017-E/ML

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

Learn More

Datasheet

47,289In Stock

S/6.77

S/6.66

S/6.03

S/5.57

View

Min.: 1
Mult.: 1

MCP23017

SMD/SMT

QFN-28

I2C, Serial

16 I/O

With Interrupt

1.8 V

5.5 V

1.7 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

MCP23S17-E/SO
Microchip Technology
1: S/6.58
33,240In Stock

Mfr. Part #
MCP23S17-E/SO

Mouser Part #
579-MCP23S17-E/SO

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

Learn More

Datasheet

33,240In Stock

S/6.58

S/5.45

S/4.98

Min.: 1
Mult.: 1

MCP23S17

SMD/SMT

SOIC-28

Serial, SPI

16 I/O

With Interrupt

1.8 V

5.5 V

10 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

MCP23S17-E/SP
Microchip Technology
1: S/6.93
10,997In Stock

Mfr. Part #
MCP23S17-E/SP

Mouser Part #
579-MCP23S17-E/SP

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

Learn More

Datasheet

10,997In Stock

S/6.93

S/5.80

S/5.25

Min.: 1
Mult.: 1

MCP23S17

Through Hole

SPDIP-28

Serial, SPI

16 I/O

With Interrupt

1.8 V

5.5 V

10 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

MCP23S17-E/SS
Microchip Technology
1: S/6.93
20,753In Stock

Mfr. Part #
MCP23S17-E/SS

Mouser Part #
579-MCP23S17-E/SS

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

Learn More

Datasheet

20,753In Stock

S/6.93

S/5.80

S/5.25

Min.: 1
Mult.: 1

MCP23S17

SMD/SMT

SSOP-28

Serial, SPI

16 I/O

With Interrupt

1.8 V

5.5 V

10 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

MCP23S17T-E/ML
Microchip Technology
1: S/7.94
42,557In Stock

Mfr. Part #
MCP23S17T-E/ML

Mouser Part #
579-MCP23S17T-E/ML

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

Learn More

Datasheet

42,557In Stock

Cut Tape

S/7.94

Reel

S/7.94

MouseReel Available

Min.: 1
Mult.: 1

: 1,600

MCP23S17

SMD/SMT

QFN-28

Serial, SPI

16 I/O

With Interrupt

4.5 V

5.5 V

10 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

MCP23S17T-E/SS
Microchip Technology
1: S/6.93
21,747In Stock
23,100Expected 12/4/2026

Mfr. Part #
MCP23S17T-E/SS

Mouser Part #
579-MCP23S17T-E/SS

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

Learn More

Datasheet

21,747In Stock

23,100Expected 12/4/2026

Cut Tape

S/6.93

Reel

S/6.93

MouseReel Available

Min.: 1
Mult.: 1

: 2,100

MCP23S17

SMD/SMT

SSOP-28

Serial, SPI

16 I/O

With Interrupt

1.8 V

5.5 V

10 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017-E/SO
Microchip Technology
1: S/6.31
38,660In Stock

Mfr. Part #
MCP23017-E/SO

Mouser Part #
579-MCP23017-E/SO

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

Learn More

Datasheet

38,660In Stock

S/6.31

S/5.25

S/4.90

Quote

Min.: 1
Mult.: 1

MCP23017

SMD/SMT

SOIC-28

I2C, Serial

16 I/O

With Interrupt

1.8 V

5.5 V

1.7 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017T-E/ML
Microchip Technology
1: S/7.40
23,311In Stock

Mfr. Part #
MCP23017T-E/ML

Mouser Part #
579-MCP23017T-E/ML

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

Learn More

Datasheet

23,311In Stock

Cut Tape

S/7.40

S/6.19

S/5.96

S/5.61

Reel

S/5.61

MouseReel Available

Min.: 1
Mult.: 1

: 1,600

MCP23017

SMD/SMT

QFN-28

I2C, Serial

16 I/O

With Interrupt

1.8 V

5.5 V

1.7 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017T-E/SS
Microchip Technology
1: S/6.58
56,274In Stock

Mfr. Part #
MCP23017T-E/SS

Mouser Part #
579-MCP23017T-E/SS

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

Learn More

Datasheet

56,274In Stock

Cut Tape

S/6.58

S/5.45

S/5.33

S/4.98

Reel

S/4.98

MouseReel Available

Min.: 1
Mult.: 1

: 2,100

MCP23017

SMD/SMT

SSOP-28

I2C, Serial

16 I/O

With Interrupt

1.8 V

5.5 V

1.7 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

MCP23S17-E/ML
Microchip Technology
1: S/7.94
4,823In Stock
9,760Expected 2/1/2027

Mfr. Part #
MCP23S17-E/ML

Mouser Part #
579-MCP23S17-E/ML

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

Learn More

Datasheet

4,823In Stock

9,760Expected 2/1/2027

S/7.94

Min.: 1
Mult.: 1

MCP23S17

SMD/SMT

QFN-28

Serial, SPI

16 I/O

With Interrupt

1.8 V

5.5 V

10 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

MCP23S17T-E/SO
Microchip Technology
1: S/6.58
9,263In Stock
12,800Expected 9/11/2026

Mfr. Part #
MCP23S17T-E/SO

Mouser Part #
579-MCP23S17T-E/SO

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp SPI interface

Learn More

Datasheet

9,263In Stock

12,800Expected 9/11/2026

Cut Tape

S/6.58

S/5.45

S/5.33

S/4.98

Reel

S/4.98

MouseReel Available

Min.: 1
Mult.: 1

: 1,600

MCP23S17

SMD/SMT

SOIC-28

Serial, SPI

16 I/O

With Interrupt

1.8 V

5.5 V

10 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

4 kV

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017-E/SP
Microchip Technology
1: S/6.58
6,063In Stock
5,965On Order

Mfr. Part #
MCP23017-E/SP

Mouser Part #
579-MCP23017-E/SP

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

Learn More

Datasheet

6,063In Stock

5,965On Order

S/6.58

Min.: 1
Mult.: 1

MCP23017

Through Hole

SPDIP-28

I2C, Serial

16 I/O

With Interrupt

1.8 V

5.5 V

1.7 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017-E/SS
Microchip Technology
1: S/6.58
9,094In Stock
14,187Expected 10/5/2026

Mfr. Part #
MCP23017-E/SS

Mouser Part #
579-MCP23017-E/SS

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

Learn More

Datasheet

9,094In Stock

14,187Expected 10/5/2026

S/6.58

S/5.45

S/4.98

Min.: 1
Mult.: 1

MCP23017

SMD/SMT

SSOP-28

I2C, Serial

16 I/O

With Interrupt

1.8 V

5.5 V

1.7 MHz

- 40 C

+ 125 C

Tube

4 kV

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

MCP23017T-E/SO
Microchip Technology
1: S/6.31
8,893In Stock
19,200Expected 9/17/2026

Mfr. Part #
MCP23017T-E/SO

Mouser Part #
579-MCP23017T-E/SO

Microchip Technology

Interface - I/O Expanders 16bit Input/Output Exp I2C interface

Learn More

Datasheet

8,893In Stock

19,200Expected 9/17/2026

Cut Tape

S/6.31

S/5.25

S/5.14

S/5.10

View

Reel

S/4.83

MouseReel Available

Min.: 1
Mult.: 1

: 1,600

MCP23017

SMD/SMT

SOIC-28

I2C, Serial

16 I/O

With Interrupt

1.8 V

5.5 V

1.7 MHz

- 40 C

+ 125 C

Reel, Cut Tape, MouseReel

4 kV

MCP23x17 I/O Expanders

Customer Service Office

Company

Resources

Support