I/O Expanders

I/O expandersare a type of computer hardware that allows more than one device to connect to a single port on a computer.

How do I/O expanders work?

The expander connects to a single spot, but has multiple connections for other devices. Such expanders offer the advantage of allowing more devices of a particular port type to be used at the same time. This commonly used with USBs and ethernet ports.

Types of I/O expanders

There are two main types of I/O expanders: internal and external.

Internal expanders

These have a connection inside the computer, typically on the motherboard, and the only part the user can see is the expansion plate which houses the ports to which they can connect more devices.

External expanders

An external expander plugs into an existing port introducing multiple new places to connect. When not part of a computer system, these devices are commonly known as splitters.


...
Read more Read less

Filters

Viewing 1 - 20 of 250 products
Results per page
Description Price Number of I/O Channels Interface Number of Pins Package Type Clock Frequency Mounting Type Maximum Supply Voltage Minimum Supply Voltage
RS Stock No. 912-6833
Mfr. Part No.MCP23S17-E/SP
BrandMicrochip
SGD1.938
Each (In a Tube of 15)
units
16 SPI 28 PDIP 10MHz Through Hole 5.5 V 1.8 V
RS Stock No. 823-3523
Mfr. Part No.MCP23S17-E/SP
BrandMicrochip
SGD2.02
Each (In a Pack of 10)
units
16 SPI 28 PDIP 10MHz Through Hole 5.5 V 1.8 V
RS Stock No. 403-806
Mfr. Part No.MCP23017-E/SP
BrandMicrochip
SGD1.85
Each (In a Pack of 5)
units
16 I2C, Serial MHz 28 SPDIP 5MHz Through Hole - -
RS Stock No. 144-5723
Mfr. Part No.MCP23017-E/SP
BrandMicrochip
SGD1.81
Each (In a Tube of 15)
units
16 I2C, Serial MHz 28 SPDIP 5MHz Through Hole - -
RS Stock No. 483-7171
Mfr. Part No.PCA9554D,112
BrandNXP
SGD2.492
Each (In a Pack of 5)
units
8 I2C, SMBus 16 SOIC 400kHz Surface Mount 5.5 V 2.3 V
RS Stock No. 103-5691
Mfr. Part No.PCA9554D,112
BrandNXP
SGD2.14
Each (In a Tube of 48)
units
8 I2C, SMBus 16 SOIC 400kHz Surface Mount - -
RS Stock No. 517-0249
Mfr. Part No.PCF8574AN
SGD2.13
Each
units
8 I2C, SMBus 16 PDIP 100kHz Through Hole - -
RS Stock No. 920-3374
Mfr. Part No.PCF8574AN
SGD1.79
Each (In a Tube of 25)
units
8 I2C, SMBus 16 PDIP 100kHz Through Hole - -
RS Stock No. 889-5109
Mfr. Part No.MCP23017-E/SO
BrandMicrochip
SGD1.601
Each (In a Tube of 27)
units
16 I2C, Serial MHz 28 SOIC 5MHz Surface Mount - -
RS Stock No. 403-816
Mfr. Part No.MCP23017-E/SO
BrandMicrochip
SGD1.928
Each (In a Pack of 5)
units
16 I2C, Serial MHz 28 SOIC 5MHz Surface Mount - -
RS Stock No. 510-780
Mfr. Part No.PCF8574T/3,512
BrandNXP
SGD2.214
Each (In a Pack of 5)
units
8 I2C 16 SOIC 100kHz Surface Mount 5.5 V 2.3 V
RS Stock No. 144-5721
Mfr. Part No.MCP23S08-E/P
BrandMicrochip
SGD1.43
Each (In a Tube of 25)
units
8 SPI 18 PDIP 10MHz Through Hole - -
RS Stock No. 403-636
Mfr. Part No.MCP23S08-E/P
BrandMicrochip
SGD1.826
Each (In a Pack of 5)
units
8 SPI 18 PDIP 10MHz Through Hole - -
RS Stock No. 124-2364
Mfr. Part No.PCF8574T/3,512
BrandNXP
SGD1.85
Each (In a Tube of 48)
units
8 I2C 16 SOIC 100kHz Surface Mount 5.5 V 2.3 V
RS Stock No. 124-2366
Mfr. Part No.PCF8575TS/1,112
BrandNXP
SGD2.74
Each (In a Tube of 59)
units
16 I2C 24 SSOP 400kHz Surface Mount 5.5 V 2.5 V
RS Stock No. 825-3508
Mfr. Part No.TCA6408ARSVR
SGD2.05
Each (In a Pack of 5)
units
8 I2C 16 QFN 400kHz Surface Mount 5.5 V 1.65 V
RS Stock No. 162-8707
Mfr. Part No.TCA6408ARSVR
SGD0.874
Each (On a Reel of 3000)
units
8 I2C 16 QFN 400kHz Surface Mount 5.5 V 1.65 V
RS Stock No. 436-8344
Mfr. Part No.PCF8575TS/1,112
BrandNXP
SGD3.44
Each
units
16 I2C 24 SSOP 400kHz Surface Mount 5.5 V 2.5 V
RS Stock No. 889-5128
Mfr. Part No.MCP23017-E/SS
BrandMicrochip
SGD1.58
Each (In a Tube of 47)
units
16 I2C 28 SSOP 1.7MHz Surface Mount - -
RS Stock No. 920-3371
Mfr. Part No.PCF8574ADW
SGD1.796
Each (In a Tube of 40)
units
- - 16 SOIC - Surface Mount - -
Related Products
Multi-port I/O expanders from Cypress Semiconductor with on-board ...
Description:
Multi-port I/O expanders from Cypress Semiconductor with on-board user accessible EEPROM and several PWM outputs. I2C interface logic electrically compatible with SMBusUp to 20 (CY8C9520A), 40 (CY8C9540A), or 60 (CY8C9560A) I/O data pins independently configurable as inputs, outputs,Bi-directional input/outputs, ...
The MCP23X17 consists of multiple 8-bit configuration registers ...
Description:
The MCP23X17 consists of multiple 8-bit configuration registers for input, output and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits (IODIRA/B). The data for each input or output ...
The MCP23X08 device provides 8-bit, general purpose, parallel ...
Description:
The MCP23X08 device provides 8-bit, general purpose, parallel I/O expansion for I2C bus or SPI applications. The two devices differ in the number of hardware address pins and the serial interface:MCP23008 – I2C interface, three address pinsMCP23S08 – SPI interface, ...
The MCP23017/MCP23S17 (MCP23X17) device family provides 16-bit, general ...
Description:
The MCP23017/MCP23S17 (MCP23X17) device family provides 16-bit, general purpose parallel I/O expansion for I2C bus or SPI applications. The two devices differ only in the serial interface.MCP23017 – I2C interface MCP23S17 – SPI interfaceThe MCP23X17 consists of multiple 8-bit configuration ...