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

Interface - I/O Expanders

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

Results: 601

Applied Filters:

Manufacturer

Series

Mounting Style

Package/Case

Interface Type

Number of I/Os

Interrupt Output

Supply Voltage - Min

Supply Voltage - Max

Maximum Clock Frequency

Minimum Operating Temperature

Maximum Operating Temperature

Qualification

Packaging

ESD Protection

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; }

Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Mounting Style	Package/Case	Interface Type	Number of I/Os	Interrupt Output	Supply Voltage - Min	Supply Voltage - Max	Maximum Clock Frequency	Minimum Operating Temperature	Maximum Operating Temperature	Packaging	ESD Protection
Interface - I/O Expanders 16B I/O Expander I2C interface MCP23018-E/MJ Microchip Technology 1: $2.04 3,090In Stock	Mfr. Part No. MCP23018-E/MJ Mouser Part No 579-MCP23018-E/MJ	Microchip Technology	Interface - I/O Expanders 16B I/O Expander I2C interface	Datasheet	3,090In Stock	$2.04 $1.69 $1.54	Min.: 1 Mult.: 1		SMD/SMT	QFN-24	I2C, Serial	16 I/O	With Interrupt	1.8 V	5.5 V	3.4 MHz	- 40 C	+ 125 C	Tube	Without ESD Protection
Interface - I/O Expanders 16B I/O Expander I2C interface MCP23018T-E/MJ Microchip Technology 1: $2.04 6,078In Stock	Mfr. Part No. MCP23018T-E/MJ Mouser Part No 579-MCP23018T-E/MJ	Microchip Technology	Interface - I/O Expanders 16B I/O Expander I2C interface	Datasheet	6,078In Stock	Cut Tape $2.04 $1.69 Reel $1.54 MouseReel Available	Min.: 1 Mult.: 1 : 3,300		SMD/SMT	QFN-24	I2C, Serial	16 I/O	With Interrupt	1.8 V	5.5 V	3.4 MHz	- 40 C	+ 125 C	Reel, Cut Tape, MouseReel	Without ESD Protection
Interface - I/O Expanders 16-bit I/O Expander I2C interface MCP23018T-E/SS Microchip Technology 1: $2.24 4,819In Stock	Mfr. Part No. MCP23018T-E/SS Mouser Part No 579-MCP23018T-E/SS	Microchip Technology	Interface - I/O Expanders 16-bit I/O Expander I2C interface	Datasheet	4,819In Stock	Cut Tape $2.24 $1.90 Reel $1.69 MouseReel Available	Min.: 1 Mult.: 1 : 2,100		SMD/SMT	SSOP-24	I2C, Serial	16 I/O	With Interrupt	1.8 V	5.5 V	3.4 MHz	- 40 C	+ 125 C	Reel, Cut Tape, MouseReel	Without ESD Protection
Interface - I/O Expanders 8bit Input/Output Exp SPI interface MCP23S08-E/ML Microchip Technology 1: $1.65 5,709In Stock	Mfr. Part No. MCP23S08-E/ML Mouser Part No 579-MCP23S08-E/ML	Microchip Technology	Interface - I/O Expanders 8bit Input/Output Exp SPI interface	Datasheet	5,709In Stock	$1.65 $1.37 $1.36	Min.: 1 Mult.: 1		SMD/SMT	QFN-20	Serial, SPI	8 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Tube	Without ESD Protection
Interface - I/O Expanders In/Out SPI int MCP23S08-E/P Microchip Technology 1: $1.61 1,028In Stock	Mfr. Part No. MCP23S08-E/P Mouser Part No 579-MCP23S08-E/P	Microchip Technology	Interface - I/O Expanders In/Out SPI int	Datasheet	1,028In Stock	$1.61 $1.35 $1.31	Min.: 1 Mult.: 1		Through Hole	PDIP-18	Serial, SPI	8 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Tube	Without ESD Protection
Interface - I/O Expanders In/Out SPI int MCP23S08-E/SS Microchip Technology 1: $1.55 8,510In Stock	Mfr. Part No. MCP23S08-E/SS Mouser Part No 579-MCP23S08-E/SS	Microchip Technology	Interface - I/O Expanders In/Out SPI int	Datasheet	8,510In Stock	$1.55 $1.29 $1.16	Min.: 1 Mult.: 1		SMD/SMT	SSOP-20	Serial, SPI	8 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Tube	Without ESD Protection
Interface - I/O Expanders 8bit Input/Output Exp SPI interface MCP23S08T-E/ML Microchip Technology 1: $1.65 2,900In Stock	Mfr. Part No. MCP23S08T-E/ML Mouser Part No 579-MCP23S08T-E/ML	Microchip Technology	Interface - I/O Expanders 8bit Input/Output Exp SPI interface	Datasheet	2,900In Stock	Cut Tape $1.65 $1.63 Reel $1.36 MouseReel Available	Min.: 1 Mult.: 1 : 3,300		SMD/SMT	QFN-20	Serial, SPI	8 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Reel, Cut Tape, MouseReel	Without ESD Protection
Interface - I/O Expanders In/Out SPI int MCP23S08T-E/SS Microchip Technology 1: $1.55 9,594In Stock	Mfr. Part No. MCP23S08T-E/SS Mouser Part No 579-MCP23S08T-E/SS	Microchip Technology	Interface - I/O Expanders In/Out SPI int	Datasheet	9,594In Stock	Cut Tape $1.55 $1.29 Reel $1.16 MouseReel Available	Min.: 1 Mult.: 1 : 1,600		SMD/SMT	SSOP-20	Serial, SPI	8 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Reel, Cut Tape, MouseReel	Without ESD Protection
Interface - I/O Expanders 8B I/O Expander SPI interface MCP23S09-E/MG Microchip Technology 1: $1.70 9,228In Stock 5,040Expected 14/12/2026	Mfr. Part No. MCP23S09-E/MG Mouser Part No 579-MCP23S09-E/MG	Microchip Technology	Interface - I/O Expanders 8B I/O Expander SPI interface	Datasheet	9,228In Stock 5,040Expected 14/12/2026	$1.70 $1.43 $1.29	Min.: 1 Mult.: 1		SMD/SMT	QFN-16	Serial, SPI	8 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Tube	4 kV
Interface - I/O Expanders 8B I/O Expander SPI interface MCP23S09T-E/MG Microchip Technology 1: $1.70 2,697In Stock	Mfr. Part No. MCP23S09T-E/MG Mouser Part No 579-MCP23S09T-E/MG	Microchip Technology	Interface - I/O Expanders 8B I/O Expander SPI interface	Datasheet	2,697In Stock	Cut Tape $1.70 $1.43 Reel $1.29 MouseReel Available	Min.: 1 Mult.: 1 : 3,300		SMD/SMT	QFN-16	Serial, SPI	8 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 SPI interface MCP23S17-E/ML Microchip Technology 1: $2.04 4,394In Stock 9,760Expected 03/12/2026	Mfr. Part No. MCP23S17-E/ML Mouser Part No 579-MCP23S17-E/ML	Microchip Technology	Interface - I/O Expanders 16bit Input/Output Exp SPI interface Learn More about Microchip Technology microchip mcp23x17 io expanders	Datasheet	4,394In Stock 9,760Expected 03/12/2026	$2.04 $1.69 $1.54	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 16B I/O Expander SPI interface MCP23S18-E/MJ Microchip Technology 1: $2.15 3,983In Stock	Mfr. Part No. MCP23S18-E/MJ Mouser Part No 579-MCP23S18-E/MJ	Microchip Technology	Interface - I/O Expanders 16B I/O Expander SPI interface	Datasheet	3,983In Stock	$2.15 $1.80 $1.63	Min.: 1 Mult.: 1		SMD/SMT	QFN-24	Serial, SPI	16 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Tube	Without ESD Protection
Interface - I/O Expanders 16B I/O Expander SPI interface MCP23S18T-E/MJ Microchip Technology 1: $2.15 2,669In Stock 9,900Expected 01/01/2027	Mfr. Part No. MCP23S18T-E/MJ Mouser Part No 579-MCP23S18T-E/MJ	Microchip Technology	Interface - I/O Expanders 16B I/O Expander SPI interface	Datasheet	2,669In Stock 9,900Expected 01/01/2027	Cut Tape $2.15 $1.80 Reel $1.63 MouseReel Available	Min.: 1 Mult.: 1 : 3,300	MCP23S18	SMD/SMT	QFN-24	Serial, SPI	16 I/O	With Interrupt	1.8 V	5.5 V	10 MHz	- 40 C	+ 125 C	Reel, Cut Tape, MouseReel	Without ESD Protection
Interface - I/O Expanders 16B I/O Expander SPI interface MCP23S18T-E/SO Microchip Technology 1: $2.15 1,151In Stock	Mfr. Part No. MCP23S18T-E/SO Mouser Part No 579-MCP23S18T-E/SO	Microchip Technology	Interface - I/O Expanders 16B I/O Expander SPI interface	Datasheet	1,151In Stock	Cut Tape $2.15 $1.80 Reel $1.63 MouseReel Available	Min.: 1 Mult.: 1 : 1,600		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	Without ESD Protection
Interface - I/O Expanders Mixed signal Expandr MCP25050-I/SL Microchip Technology 1: $4.84 1,011In Stock	Mfr. Part No. MCP25050-I/SL Mouser Part No 579-MCP25050-I/SL	Microchip Technology	Interface - I/O Expanders Mixed signal Expandr	Datasheet	1,011In Stock	$4.84 $4.02 $4.00	Min.: 1 Mult.: 1		SMD/SMT	SOIC-14	CAN	8 I/O	Without Interrupt	5.5 V	5.5 V	25 MHz	- 65 C	+ 150 C	Tube	3.5 kV
Interface - I/O Expanders Remote 8B I2C & Lo- Pwr I/O Expander A 5 A 595-PCA9534DW PCA9534DWR Texas Instruments 1: $3.27 3,843In Stock	Mfr. Part No. PCA9534DWR Mouser Part No 595-PCA9534DWR	Texas Instruments	Interface - I/O Expanders Remote 8B I2C & Lo- Pwr I/O Expander A 5 A 595-PCA9534DW	Datasheet	3,843In Stock	Cut Tape $3.27 $2.45 $2.24 $2.01 Reel $1.72 View $1.90 $1.86 $1.81 $1.61 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCA9534	SMD/SMT	SOIC-16	I2C, Serial, SMBus	8 I/O	With Interrupt	2.3 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders Remote 4-Bit I2C and SMBus I/O Expander A 595-PCA9536D PCA9536DR Texas Instruments 1: $1.56 10,178In Stock	Mfr. Part No. PCA9536DR Mouser Part No 595-PCA9536DR	Texas Instruments	Interface - I/O Expanders Remote 4-Bit I2C and SMBus I/O Expander A 595-PCA9536D	Datasheet	10,178In Stock	Cut Tape $1.56 $1.15 $1.04 $0.92 Reel $0.793 View $0.865 $0.831 $0.823 $0.775 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	PCA9536	SMD/SMT	SOIC-8	I2C, Serial, SMBus	4 I/O	Without Interrupt	2.3 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders Rem 8B I2C & SMBus L o-Pwr I/O Expander A 595-PCA9538DW PCA9538DWR Texas Instruments 1: $4.04 1,463In Stock	Mfr. Part No. PCA9538DWR Mouser Part No 595-PCA9538DWR	Texas Instruments	Interface - I/O Expanders Rem 8B I2C & SMBus L o-Pwr I/O Expander A 595-PCA9538DW	Datasheet	1,463In Stock	Cut Tape $4.04 $3.05 $2.80 $2.53 View Reel $2.18 $2.40 $2.38 $2.24 $2.18 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCA9538	SMD/SMT	SOIC-16	I2C, Serial, SMBus	8 I/O	With Interrupt	2.3 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders 16-Bit I2C & SMBus L o-Pwr I/O Expander PCA9539DGVR Texas Instruments 1: $2.12 1,525In Stock	Mfr. Part No. PCA9539DGVR Mouser Part No 595-PCA9539DGVR	Texas Instruments	Interface - I/O Expanders 16-Bit I2C & SMBus L o-Pwr I/O Expander	Datasheet	1,525In Stock	Cut Tape $2.12 $1.97 Reel $1.96 $1.80 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCA9539	SMD/SMT	TVSOP-24	I2C, Serial, SMBus	16 I/O	With Interrupt	2.3 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders 16-Bit I2C & SMBus L o-Pwr I/O Expander A 595-PCA9539DW PCA9539DWR Texas Instruments 1: $4.11 2,144In Stock	Mfr. Part No. PCA9539DWR Mouser Part No 595-PCA9539DWR	Texas Instruments	Interface - I/O Expanders 16-Bit I2C & SMBus L o-Pwr I/O Expander A 595-PCA9539DW	Datasheet	2,144In Stock	Cut Tape $4.11 $3.11 $2.86 $2.59 Reel $2.30 View $2.46 $2.44 $2.36 $2.20 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCA9539	SMD/SMT	SOIC-24	I2C, Serial, SMBus	16 I/O	With Interrupt	2.3 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders Rem 8B I2C & SMBus I /O Expander PCA9554ARGVR Texas Instruments 1: $2.95 2,365In Stock	Mfr. Part No. PCA9554ARGVR Mouser Part No 595-PCA9554ARGVR	Texas Instruments	Interface - I/O Expanders Rem 8B I2C & SMBus I /O Expander Learn More about Texas Instruments ti pca95xx	Datasheet	2,365In Stock	Cut Tape $2.95 $2.20 $2.02 $1.81 Reel $1.47 View $1.71 $1.67 $1.63 $1.45 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	PCA9554A	SMD/SMT	VQFN-16	I2C, Serial, SMBus	8 I/O	With Interrupt	2.3 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders Remote 16-Bit I2C & SMBus I/O Expander A A 595-PCA9555DW PCA9555DWR Texas Instruments 1: $3.69 1,329In Stock	Mfr. Part No. PCA9555DWR Mouser Part No 595-PCA9555DWR	Texas Instruments	Interface - I/O Expanders Remote 16-Bit I2C & SMBus I/O Expander A A 595-PCA9555DW	Datasheet	1,329In Stock	Cut Tape $3.69 $2.76 $2.53 $2.27 Reel $1.87 View $2.15 $2.11 $2.05 $1.84 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCA9555	SMD/SMT	SOIC-24	I2C, Serial, SMBus	16 I/O	With Interrupt	2.3 V	5.5 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp A A 595-PCA9557D PCA9557DR Texas Instruments 1: $1.75 2,701In Stock	Mfr. Part No. PCA9557DR Mouser Part No 595-PCA9557DR	Texas Instruments	Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp A A 595-PCA9557D Learn More about Texas Instruments ti pca95xx	Datasheet	2,701In Stock	Cut Tape $1.75 $1.29 $1.17 $1.04 Reel $0.90 View $0.977 $0.94 $0.935 $0.857 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	PCA9557	SMD/SMT	SOIC-Narrow-16	I2C, Serial, SMBus	8 I/O	Without Interrupt	2.5 V	6 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp PCA9557RGYR Texas Instruments 1: $2.90 2,750In Stock	Mfr. Part No. PCA9557RGYR Mouser Part No 595-PCA9557RGYR	Texas Instruments	Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp	Datasheet	2,750In Stock	Cut Tape $2.90 $2.16 $1.98 $1.78 Reel $1.68 View $1.68 $1.52 MouseReel Available	Min.: 1 Mult.: 1 : 3,000	PCA9557	SMD/SMT	VQFN-16	I2C, Serial, SMBus	8 I/O	Without Interrupt	2.5 V	6 V	400 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	2 kV
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus PCF8574ADGVR Texas Instruments 1: $3.48 6,906In Stock	Mfr. Part No. PCF8574ADGVR Mouser Part No 595-PCF8574ADGVR	Texas Instruments	Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus	Datasheet	6,906In Stock	Cut Tape $3.48 $2.68 $2.53 $2.43 Reel $1.90 View $2.40 $2.34 $1.88 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	PCF8574A	SMD/SMT	TVSOP-20	I2C, Serial	8 I/O	With Interrupt	2.5 V	6 V	100 kHz	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel	1 kV