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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
PCA9554AD,118 NXP USA Inc.

PCA9554AD,118

IC XPNDR 400KHZ I2C SMBUS 16SO

NXP USA Inc.

2,957 -
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
PCA9534APWR Texas Instruments

PCA9534APWR

IC XPND 400KHZ I2C SMBUS 16TSSOP

Texas Instruments

15,813 -
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
PCA9534RGVR Texas Instruments

PCA9534RGVR

IC XPNDR 400KHZ I2C SMBUS 16VQFN

Texas Instruments

10,365 -
Datasheet - 16-VQFN 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-VQFN (4x4)
PCA9534ARGTR Texas Instruments

PCA9534ARGTR

IC XPNDR 400KHZ I2C SMBUS 16VQFN

Texas Instruments

1,701 -
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-VQFN (3x3)
PCA9555DBR Texas Instruments

PCA9555DBR

IC XPNDR 400KHZ I2C SMBUS 24SSOP

Texas Instruments

2,671 -
Datasheet - 24-SSOP (0.209", 5.30mm 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-SSOP
PCA9539RGER Texas Instruments

PCA9539RGER

IC XPNDR 400KHZ I2C SMBUS 24VQFN

Texas Instruments

2,006 -
Datasheet - 24-VFQFN Exposed Pad 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-VQFN (4x4)
PCAL6524EVJ NXP USA Inc.

PCAL6524EVJ

IC XPNDR 1MHZ I2C 36VFBGA

NXP USA Inc.

20,515 -
Datasheet - 36-VFBGA Tape & Reel (TR) Active Not Verified 24 I2C Yes POR Open Drain, Push-Pull - 1 MHz 1.65V ~ 5.5V -40°C ~ 85°C - - Surface Mount 36-VFBGA (2.6x2.6)
PCAL9722HN/Q900MP NXP USA Inc.

PCAL9722HN/Q900MP

LOW-VOLTAGE TRANSLATING 22-BIT S

NXP USA Inc.

1,922 -
Datasheet - 32-VFQFN Exposed Pad Tape & Reel (TR) Active - 22 SPI Yes POR Open Drain, Push-Pull 10mA, 25mA 5 MHz 1.1V ~ 5.5V, 1.65V ~ 5.5V -40°C ~ 125°C - - Surface Mount 32-HVQFN (5x5)
PCA9674APW,118 NXP USA Inc.

PCA9674APW,118

IC XPNDR 1MHZ I2C 16TSSOP

NXP USA Inc.

25,851 -
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
TCAL9539PWR Texas Instruments

TCAL9539PWR

I2C GENERAL-PURPOSE I/OS (GPIOS)

Texas Instruments

2,650 -
Datasheet - 24-TSSOP (0.173", 4.40mm Width) 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-TSSOP
TCAL9539RTWR Texas Instruments

TCAL9539RTWR

16-BIT LOW-VOLTAGE IC-BUS AND SM

Texas Instruments

2,247 -
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)
PCA9674ABS,118 NXP USA Inc.

PCA9674ABS,118

IC XPNDR 1MHZ I2C 16HVQFN

NXP USA Inc.

2,011 -
Datasheet - 16-VFQFN Exposed Pad 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-HVQFN (3x3)
PCA9555PW,112 NXP USA Inc.

PCA9555PW,112

IC XPND 400KHZ I2C SMBUS 24TSSOP

NXP USA Inc.

878 -
Datasheet - 24-TSSOP (0.173", 4.40mm Width) Tube Last Time Buy 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
PI4IOE5V9554ALEX Diodes Incorporated

PI4IOE5V9554ALEX

IC XPNDR 400KHZ I2C 16TSSOP

Diodes Incorporated

6,325 -
Datasheet - 16-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 8 I2C Yes - - - 400 kHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 16-TSSOP
PI4IOE5V9538LEX Diodes Incorporated

PI4IOE5V9538LEX

IC XPNDR 400KHZ SMBUS 16TSSOP

Diodes Incorporated

1,870 -
Datasheet - 16-TSSOP (0.173", 4.40mm Width) Tape & Reel (TR) Active Not Verified 8 SMBus Yes POR Push-Pull - 400 kHz 2.3V ~ 5.5V - - - Surface Mount 16-TSSOP
TCAL6416PWR Texas Instruments

TCAL6416PWR

16-BIT TRANSLATING IC-BUS/SMBUS

Texas Instruments

2,152 -
Datasheet - 24-TSSOP (0.173", 4.40mm Width) 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-TSSOP
PCAL9554BPWJ NXP USA Inc.

PCAL9554BPWJ

IC XPND 400KHZ I2C SMBUS 16TSSOP

NXP USA Inc.

6,480 -
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
PI4IOE5V9536UEX Diodes Incorporated

PI4IOE5V9536UEX

IC XPNDR 1MHZ SMBUS 8MSOP

Diodes Incorporated

34,466 -
Datasheet - 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Tape & Reel (TR) Active Not Verified 4 SMBus No POR - 50mA 1 MHz 2.3V ~ 5.5V -40°C ~ 85°C - - Surface Mount 8-MSOP
MCP23018T-E/SO Microchip Technology

MCP23018T-E/SO

IC XPNDR 3.4MHZ I2C 28SOIC

Microchip Technology

3,768 -
Datasheet - 28-SOIC (0.295", 7.50mm Width) 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 28-SOIC
MCP23018-E/SO Microchip Technology

MCP23018-E/SO

IC XPNDR 3.4MHZ I2C 28SOIC

Microchip Technology

418 -
Datasheet - 28-SOIC (0.295", 7.50mm Width) Tube Active Not Verified 16 I2C Yes POR Open Drain 25mA 3.4 MHz 1.8V ~ 5.5V -40°C ~ 125°C - - Surface Mount 28-SOIC
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WINSUN SOURCING SUPPORT

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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.