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.

227 Products showing for I/O Expanders

In Stock
DiodesZetex 8-Channel I/O Expander I2C TQFN 16, PI4IOE5V9554ALEX
  • RS stock no. 216-275
  • Mfr. Part No. PI4IOE5V9554ALEX
Subtotal (1 unit)
R 19,85(exc. VAT)
R 19,85/unit
In Stock
Texas Instruments 8-Channel I/O Expander TSSOP 16, TCA9554APWR
  • RS stock no. 814-3990
  • Mfr. Part No. TCA9554APWR
Subtotal (1 pack of 10 units)
R 206,31(exc. VAT)
R 20,631/unit
In Stock
DiodesZetex 16-Channel I/O Expander I2C TQFN 24, PI4IOE5V6416ZDEX
  • RS stock no. 216-256
  • Mfr. Part No. PI4IOE5V6416ZDEX
Subtotal (1 unit)
R 24,39(exc. VAT)
R 24,39/unit
In Stock
Microchip 16-Channel I/O Expander SPDIP 28, MCP23017-E/SP
  • RS stock no. 403-806
  • Mfr. Part No. MCP23017-E/SP
Subtotal (1 pack of 5 units)
R 141,58(exc. VAT)
R 28,316/unit
In Stock
Microchip 16-Channel I/O Expander SOIC 28, MCP23017-E/SO
  • RS stock no. 403-816
  • Mfr. Part No. MCP23017-E/SO
Subtotal (1 pack of 5 units)
R 138,29(exc. VAT)
R 27,658/unit
In Stock
Microchip 8-Channel I/O Expander PDIP 18, MCP23008-E/P
  • RS stock no. 403-563
  • Mfr. Part No. MCP23008-E/P
Subtotal (1 pack of 5 units)
R 133,19(exc. VAT)
R 26,638/unit
In Stock
Microchip 8-Channel I/O Expander SOIC 18, MCP23008-E/SO
  • RS stock no. 403-642
  • Mfr. Part No. MCP23008-E/SO
Subtotal (1 pack of 5 units)
R 98,70(exc. VAT)
R 19,74/unit
In Stock
Microchip 16-Channel I/O Expander SPDIP 28
  • RS stock no. 669-6455
  • Mfr. Part No. MCP23018-E/SP
Subtotal (1 pack of 5 units)
R 182,37(exc. VAT)
R 36,474/unit
In Stock
Microchip 16-Channel I/O Expander Serial-SPI QFN 28, MCP23S17-E/ML
  • RS stock no. 770-9735
  • Mfr. Part No. MCP23S17-E/ML
Subtotal (1 pack of 3 units)
R 104,49(exc. VAT)
R 34,83/unit
In Stock
Microchip 16-Channel I/O Expander SPDIP 28
  • RS stock no. 681-1143
  • Mfr. Part No. MCP23016-I/SP
Subtotal (1 pack of 2 units)
R 62,06(exc. VAT)
R 31,03/unit
Temporarily out of stock
Texas Instruments 16-Channel I/O Expander WQFN 24, TCA9535RTWR
  • RS stock no. 229-7057
  • Mfr. Part No. TCA9535RTWR
Subtotal (1 pack of 5 units)
R 205,68(exc. VAT)
R 41,136/unit
In Stock
Microchip 8-Channel I/O Expander SPI PDIP 18, MCP23S08-E/P
  • RS stock no. 403-636
  • Mfr. Part No. MCP23S08-E/P
Subtotal (1 pack of 5 units)
R 136,14(exc. VAT)
R 27,228/unit
In Stock
Microchip 16-Channel I/O Expander SPI SOIC 28, MCP23S17T-E/SO
  • RS stock no. 177-3101
  • Mfr. Part No. MCP23S17T-E/SO
Subtotal (1 pack of 10 units)
R 244,94(exc. VAT)
R 24,494/unit
Last RS stock
NXP 16-Channel I/O Expander TSSOP 24, PCA9555PW,112
  • RS stock no. 483-7222
  • Mfr. Part No. PCA9555PW,112
Subtotal (1 unit)
R 31,20(exc. VAT)
R 31,20/unit
In Stock
Microchip 8-Channel I/O Expander SPI SOIC 18, MCP23S08-E/SO
  • RS stock no. 403-812
  • Mfr. Part No. MCP23S08-E/SO
Subtotal (1 pack of 5 units)
R 127,40(exc. VAT)
R 25,48/unit
In Stock
Microchip 16-Channel I/O Expander Serial-SPI SOIC 28, MCP23S17-E/SO
  • RS stock no. 403-894
  • Mfr. Part No. MCP23S17-E/SO
Subtotal (1 pack of 5 units)
R 145,10(exc. VAT)
R 29,02/unit
In Stock
Microchip 16-Channel I/O Expander Serial-SPI SSOP 28, MCP23S17-E/SS
  • RS stock no. 669-6452
  • Mfr. Part No. MCP23S17-E/SS
Subtotal (1 pack of 5 units)
R 152,87(exc. VAT)
R 30,574/unit
In Stock
NXP 8-Channel I/O Expander SSOP 20, PCF8574TS/3,118
  • RS stock no. 219-4650
  • Mfr. Part No. PCF8574TS/3,118
Subtotal (1 pack of 10 units)
R 204,61(exc. VAT)
R 20,461/unit
Last RS stock
NXP 16-Channel I/O Expander SOIC 24
  • RS stock no. 483-7193
  • Mfr. Part No. PCA9555D,112
Subtotal (1 unit)
R 58,43(exc. VAT)
R 58,43/unit
Temporarily out of stock
NXP 8-Channel Remote 8 Bit I/O Expander SOIC 16, PCF8574T/3,512
  • RS stock no. 510-780
  • Mfr. Part No. PCF8574T/3,512
Subtotal (1 pack of 5 units)
R 122,07(exc. VAT)
R 24,414/unit
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