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I/O Expanders

Browse available I/O Expanders part numbers with manufacturer references, stock information, pricing, datasheets and key specifications. Use the table below to compare options for your project.

For BOM, shortage or hard-to-find requirements, send your part number and quantity to Winsun (HK) Electronics for availability, lead-time and quotation support.

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Photo Mfr. Part # Availability Price Quantity Datasheet Series Package/Case Packaging Product Status Programmable Number of I/O Interface Interrupt Output Features Output Type Current - Output Source/Sink Clock Frequency Voltage - Supply Operating Temperature Grade Qualification Mounting Type Supplier Device Package
MCP23S08T-E/SO Microchip Technology

MCP23S08T-E/SO

IC XPNDR 10MHZ SPI 18SOIC

Microchip Technology

18,664 -
Datasheet - 18-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified 8 SPI Yes POR Push-Pull 25mA 10 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 18-SOIC
PCA9557PW,118 NXP USA Inc.

PCA9557PW,118

IC XPND 400KHZ I2C SMBUS 16TSSOP

NXP USA Inc.

4,742 -
Datasheet - 16-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 8 I2C, SMBus No POR Open Drain, Push-Pull 10mA, 20mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-TSSOP
MCP23S08-E/SO Microchip Technology

MCP23S08-E/SO

IC XPNDR 10MHZ SPI 18SOIC

Microchip Technology

2,699 -
Datasheet - 18-SOIC (0.295", 7.50mm Width) Tube Active Not Verified 8 SPI Yes POR Push-Pull 25mA 10 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 18-SOIC
MCP23008-E/P Microchip Technology

MCP23008-E/P

IC XPNDR 1.7MHZ I2C 18DIP

Microchip Technology

219 -
Datasheet - 18-DIP (0.300", 7.62mm) Tube Active Not Verified 8 I2C Yes POR Push-Pull 25mA 1.7 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Through Hole 18-PDIP
MCP23S08T-E/SS Microchip Technology

MCP23S08T-E/SS

IC XPNDR 10MHZ SPI 20SSOP

Microchip Technology

10,536 -
Datasheet - 20-SSOP (0.209", 5.30mm Width) Tape & Reel (TR) Active Not Verified 8 SPI Yes POR Push-Pull 25mA 10 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 20-SSOP
TCA6416ARTWR Texas Instruments

TCA6416ARTWR

IC XPNDR 400KHZ I2C SMBUS 24WQFN

Texas Instruments

8,908 -
Datasheet - 24-WFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 16 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 24-WQFN (4x4)
PCA9534BS3,118 NXP USA Inc.

PCA9534BS3,118

IC XPND 400KHZ I2C SMBUS 16HVQFN

NXP USA Inc.

5,464 -
Datasheet - 16-VFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 8 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-HVQFN (3x3)
PCA9670BS,118 NXP USA Inc.

PCA9670BS,118

IC XPNDR 1MHZ I2C 16HVQFN

NXP USA Inc.

5,331 -
Datasheet - 16-VFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 8 I2C No POR Push-Pull 100µA, 25mA 1 MHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-HVQFN (3x3)
PCA9554PW,112 NXP USA Inc.

PCA9554PW,112

IC XPND 400KHZ I2C SMBUS 16TSSOP

NXP USA Inc.

3,344 -
Datasheet - 16-TSSOP (0.173", 4.40mm Width) Tube Last Time Buy Not Verified 8 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-TSSOP
MCP23S08-E/SS Microchip Technology

MCP23S08-E/SS

IC XPNDR 10MHZ SPI 20SSOP

Microchip Technology

2,304 -
Datasheet - 20-SSOP (0.209", 5.30mm Width) Tube Active Not Verified 8 SPI Yes POR Push-Pull 25mA 10 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 20-SSOP
PCA9554D,118 NXP USA Inc.

PCA9554D,118

IC XPNDR 400KHZ I2C SMBUS 16SO

NXP USA Inc.

772 -
Datasheet - 16-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified 8 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-SO
PCA9554APW,118 NXP USA Inc.

PCA9554APW,118

IC XPND 400KHZ I2C SMBUS 16TSSOP

NXP USA Inc.

7,288 -
Datasheet - 16-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 8 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-TSSOP
PCA6416APW,118 NXP USA Inc.

PCA6416APW,118

IC XPND 400KHZ I2C SMBUS 24TSSOP

NXP USA Inc.

5,256 -
Datasheet - 24-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 16 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 24-TSSOP
PCA6416AHF,128 NXP USA Inc.

PCA6416AHF,128

IC XPND 400KHZ I2C SMBUS 24HWQFN

NXP USA Inc.

558 -
Datasheet - 24-WFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 16 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 24-HWQFN (4x4)
PCA9554ADB,118 NXP USA Inc.

PCA9554ADB,118

IC XPNDR 400KHZ I2C SMBUS 16SSOP

NXP USA Inc.

703 -
Datasheet - 16-SSOP (0.209", 5.30mm Width) Tape & Reel (TR) Active Not Verified 8 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-SSOP
PCF8574PWR Texas Instruments

PCF8574PWR

IC XPNDR 100KHZ I2C 20TSSOP

Texas Instruments

2,083 -
Datasheet - 20-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 8 I2C Yes POR Push-Pull 1mA, 25mA 100 kHz 2.5V ~ 6V -40°C ~ 85°C - - Surface Mount 20-TSSOP
PCA9557D,118 NXP USA Inc.

PCA9557D,118

IC XPNDR 400KHZ I2C SMBUS 16SO

NXP USA Inc.

508 -
Datasheet - 16-SOIC (0.154", 3.90mm Width) Tape & Reel (TR) Last Time Buy Not Verified 8 I2C, SMBus No POR Open Drain, Push-Pull 10mA, 25mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-SO
PCA9557BS,118 NXP USA Inc.

PCA9557BS,118

IC XPND 400KHZ I2C SMBUS 16HVQFN

NXP USA Inc.

278 -
Datasheet - 16-VQFN Exposed Pad Tape & Reel (TR) Active Not Verified 8 I2C, SMBus No POR Open Drain, Push-Pull 10mA, 25mA 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-HVQFN (4x4)
MCP23017T-E/SO Microchip Technology

MCP23017T-E/SO

IC XPNDR 1.7MHZ I2C 28SOIC

Microchip Technology

11,036 -
Datasheet - 28-SOIC (0.295", 7.50mm Width) Tape & Reel (TR) Active Not Verified 16 I2C Yes POR Push-Pull 25mA 1.7 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 28-SOIC
MCP23017-E/SO Microchip Technology

MCP23017-E/SO

IC XPNDR 1.7MHZ I2C 28SOIC

Microchip Technology

3,308 -
Datasheet - 28-SOIC (0.295", 7.50mm Width) Tube Active Not Verified 16 I2C Yes POR Push-Pull 25mA 1.7 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 28-SOIC
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WINSUN SOURCING SUPPORT

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Send the manufacturer, part number, quantity and target delivery requirement. Winsun (HK) Electronics can assist with availability checks, quotation support, shortage sourcing and hard-to-find or obsolete components.

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FREQUENTLY ASKED QUESTIONS

I/O Expanders FAQ

Common questions about selecting, comparing and sourcing I/O Expanders components through Winsun (HK) Electronics.

What should I check when selecting I/O Expanders components?

Compare the manufacturer part number, electrical specifications, package, operating conditions and application requirements. The product datasheet should be used to confirm technical suitability.

Can Winsun help source specific I/O Expanders part numbers?

Yes. Send the exact part number, manufacturer and required quantity. Winsun (HK) Electronics can assist with availability checks, quotation support and sourcing options based on your requirement.

Do you support shortage, obsolete or hard-to-find I/O Expanders parts?

Yes. Our sourcing team can review shortage and obsolete-part requirements and help check available supply channels or possible alternatives when appropriate.

How do I request a quote for I/O Expanders components?

Submit an RFQ with the part number, manufacturer, quantity and target delivery requirement. Our sales team will review your request and follow up with current sourcing information.