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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.

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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
PCA9674PW,118 NXP USA Inc.

PCA9674PW,118

IC XPNDR 1MHZ I2C 16TSSOP

NXP USA Inc.

4,125 -
Datasheet - 16-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 8 I2C Yes POR Push-Pull 100µA, 25mA 1 MHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-TSSOP
PCA9555PW,118 NXP USA Inc.

PCA9555PW,118

IC XPND 400KHZ I2C SMBUS 24TSSOP

NXP USA Inc.

91,090 -
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 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 24-TSSOP
TCA6424ARGJR Texas Instruments

TCA6424ARGJR

IC XPNDR 400KHZ I2C SMBUS 32UQFN

Texas Instruments

2,823 -
Datasheet - 32-UFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 24 I2C, SMBus Yes POR Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 32-UQFN (5x5)
TCAL6416RTWR Texas Instruments

TCAL6416RTWR

16-BIT TRANSLATING IC-BUS/SMBUS

Texas Instruments

2,068 -
Datasheet - 24-WFQFN Exposed Pad Tape & Reel (TR) Active - 16 I2C Yes POR Open Drain, Push-Pull 10mA, 25mA 100 kHz 1.08V ~ 3.6V -40°C ~ 125°C - - Surface Mount 24-WQFN (4x4)
PCAL9538APWJ NXP USA Inc.

PCAL9538APWJ

IC XPND 400KHZ I2C SMBUS 16TSSOP

NXP USA Inc.

4,602 -
Datasheet Agile 16-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 8 I2C, SMBus Yes POR Open Drain, Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-TSSOP
PI4IOE5V6416ZDEX Diodes Incorporated

PI4IOE5V6416ZDEX

IC XPNDR 400KHZ I2C 24TQFN

Diodes Incorporated

6,375 -
Datasheet - 24-VFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 16 I2C Yes POR Open Drain, Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 24-TQFN (4x4)
PCA9535APW,118 NXP USA Inc.

PCA9535APW,118

IC XPND 400KHZ I2C SMBUS 24TSSOP

NXP USA Inc.

5,118 -
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
PCA9701PW,118 NXP USA Inc.

PCA9701PW,118

IC XPNDR 5MHZ SPI SERIAL 24TSSOP

NXP USA Inc.

4,327 -
Datasheet - 24-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 16 (Input Only) SPI Serial Yes - Push-Pull - 5 MHz 2.5V ~ 5.5V -40°C ~ 125°C - - Surface Mount 24-TSSOP
PCA9555APW,118 NXP USA Inc.

PCA9555APW,118

IC XPND 400KHZ I2C SMBUS 24TSSOP

NXP USA Inc.

2,078 -
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
PCAL9555APW,118 NXP USA Inc.

PCAL9555APW,118

IC XPND 400KHZ I2C SMBUS 24TSSOP

NXP USA Inc.

1,012 -
Datasheet Agile 24-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 16 I2C, SMBus Yes POR Open Drain, Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 24-TSSOP
MCP23S17T-E/ML Microchip Technology

MCP23S17T-E/ML

IC XPNDR 10MHZ SPI 28QFN

Microchip Technology

34,710 -
Datasheet - 28-VQFN Exposed Pad Tape & Reel (TR) Active Not Verified 16 SPI Yes POR Push-Pull 25mA 10 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 28-QFN (6x6)
MCP23018T-E/MJ Microchip Technology

MCP23018T-E/MJ

IC XPNDR 3.4MHZ I2C 24QFN

Microchip Technology

6,076 -
Datasheet - 24-VFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 16 I2C Yes POR Open Drain 25mA 3.4 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 24-QFN (4x4)
MCP23018-E/MJ Microchip Technology

MCP23018-E/MJ

IC XPNDR 3.4MHZ I2C 24QFN

Microchip Technology

1,846 -
Datasheet - 24-VFQFN Exposed Pad Tube Active Not Verified 16 I2C Yes POR Open Drain 25mA 3.4 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 24-QFN (4x4)
TCA9539QPWRQ1 Texas Instruments

TCA9539QPWRQ1

IC XPND 400KHZ I2C SMBUS 24TSSOP

Texas Instruments

3,472 -
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 ~ 3.6V -40°C ~ 125°C Automotive AEC-Q100 Surface Mount 24-TSSOP
PCA9539AHF,128 NXP USA Inc.

PCA9539AHF,128

IC XPND 400KHZ I2C SMBUS 24HWQFN

NXP USA Inc.

20,005 -
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)
TCAL9539RTWRQ1 Texas Instruments

TCAL9539RTWRQ1

AUTOMOTIVE 16-BIT LOW VOLTAGE IC

Texas Instruments

7,329 -
Datasheet - 24-WFQFN Exposed Pad Tape & Reel (TR) Active - 16 I2C, SMBus Yes POR Open Drain, Push-Pull 10mA, 25mA 1 MHz 1.08V ~ 3.6V -40°C ~ 125°C - - Surface Mount 24-WQFN (4x4)
PCAL9555AHF,128 NXP USA Inc.

PCAL9555AHF,128

IC XPNDR 400KHZ I2C 24HWQFN

NXP USA Inc.

2,208 -
Datasheet Agile 24-WFQFN Exposed Pad Tape & Reel (TR) Active Not Verified 16 I2C Yes POR Open Drain, Push-Pull 10mA, 25mA 400 kHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 24-HWQFN (4x4)
MCP23016-I/SO Microchip Technology

MCP23016-I/SO

IC XPNDR 400KHZ I2C 28SOIC

Microchip Technology

830 -
Datasheet - 28-SOIC (0.295", 7.50mm Width) Tube Active Not Verified 16 I2C Yes POR Push-Pull 25mA 400 kHz 2V ~ 5.5V -40°C ~ 85°C - - Surface Mount 28-SOIC
PCA9555AHF,128 NXP USA Inc.

PCA9555AHF,128

IC XPND 400KHZ I2C SMBUS 24HWQFN

NXP USA Inc.

42,324 -
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)
MCP23S18-E/MJ Microchip Technology

MCP23S18-E/MJ

IC XPNDR 10MHZ SPI 24QFN

Microchip Technology

8,985 -
Datasheet - 24-VFQFN Exposed Pad Tube Active Not Verified 16 SPI Yes - Open Drain 25mA 10 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 24-QFN (4x4)
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WINSUN SOURCING SUPPORT

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I/O Expanders FAQ

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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.