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.


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Omschrijving Prijs Number of I/O Channels Interface Number of Pins Package Type Clock Frequency Mounting Type Maximum Supply Voltage Minimum Supply Voltage
RS-stocknr. 403-806
FabrikantnummerMCP23017-E/SP
FabrikantMicrochip
1,12 €
Each (In a Pack of 5)
Aantal stuks
16 I2C, Serial 28 SPDIP 5MHz Through Hole - -
RS-stocknr. 144-5723
FabrikantnummerMCP23017-E/SP
FabrikantMicrochip
1,019 €
Each (In a Tube of 15)
Aantal stuks
16 I2C, Serial 28 SPDIP 5MHz Through Hole - -
RS-stocknr. 165-4752
FabrikantnummerMCP23008-E/P
FabrikantMicrochip
0,77 €
Each (In a Tube of 25)
Aantal stuks
8 I2C, Serial 18 PDIP 5MHz Through Hole - -
RS-stocknr. 403-563
FabrikantnummerMCP23008-E/P
FabrikantMicrochip
1,014 €
Each (In a Pack of 5)
Aantal stuks
8 I2C, Serial 18 PDIP 5MHz Through Hole - -
RS-stocknr. 912-6833
FabrikantnummerMCP23S17-E/SP
FabrikantMicrochip
1,069 €
Each (In a Tube of 15)
Aantal stuks
16 SPI 28 PDIP 10MHz Through Hole 5.5 V 1.8 V
RS-stocknr. 823-3523
FabrikantnummerMCP23S17-E/SP
FabrikantMicrochip
1,187 €
Each (In a Pack of 10)
Aantal stuks
16 SPI 28 PDIP 10MHz Through Hole 5.5 V 1.8 V
RS-stocknr. 403-636
FabrikantnummerMCP23S08-E/P
FabrikantMicrochip
1,06 €
Each (In a Pack of 5)
Aantal stuks
8 SPI 18 PDIP 10MHz Through Hole - -
RS-stocknr. 770-9735
FabrikantnummerMCP23S17-E/ML
FabrikantMicrochip
1,34 €
Each (In a Pack of 3)
Aantal stuks
16 Serial-SPI 28 QFN 10MHz Surface Mount 5.5 V 1.8 V
RS-stocknr. 165-2102
FabrikantnummerMCP23S17-E/ML
FabrikantMicrochip
1,069 €
Each (In a Tube of 61)
Aantal stuks
16 Serial-SPI 28 QFN 10MHz Surface Mount 5.5 V 1.8 V
RS-stocknr. 144-5721
FabrikantnummerMCP23S08-E/P
FabrikantMicrochip
0,805 €
Each (In a Tube of 25)
Aantal stuks
8 SPI 18 PDIP 10MHz Through Hole - -
RS-stocknr. 681-1128
FabrikantnummerMCP23017-E/SS
FabrikantMicrochip
1,115 €
Each (In a Pack of 2)
Aantal stuks
16 I2C 28 SSOP 1.7MHz Surface Mount - -
RS-stocknr. 912-6763
FabrikantnummerMCP23S18-E/SO
FabrikantMicrochip
1,132 €
Each (In a Tube of 27)
Aantal stuks
16 SPI 28 SOIC 10MHz Surface Mount - -
RS-stocknr. 669-6461
FabrikantnummerMCP23S18-E/SO
FabrikantMicrochip
1,41 €
Each (In a Pack of 2)
Aantal stuks
16 SPI 28 SOIC 10MHz Surface Mount - -
RS-stocknr. 889-5128
FabrikantnummerMCP23017-E/SS
FabrikantMicrochip
0,888 €
Each (In a Tube of 47)
Aantal stuks
16 I2C 28 SSOP 1.7MHz Surface Mount - -
RS-stocknr. 403-812
FabrikantnummerMCP23S08-E/SO
FabrikantMicrochip
1,012 €
Each (In a Pack of 5)
Aantal stuks
8 SPI 18 SOIC 10MHz Surface Mount - -
RS-stocknr. 681-1143
FabrikantnummerMCP23016-I/SP
FabrikantMicrochip
1,475 €
Each (In a Pack of 2)
Aantal stuks
16 I2C 28 SPDIP 400MHz Through Hole - -
RS-stocknr. 889-5285
FabrikantnummerMCP23S08-E/SO
FabrikantMicrochip
0,805 €
Each (In a Tube of 42)
Aantal stuks
8 SPI 18 SOIC 10MHz Surface Mount - -
RS-stocknr. 165-4811
FabrikantnummerMCP23016-I/SP
FabrikantMicrochip
1,343 €
Each (In a Tube of 15)
Aantal stuks
16 I2C 28 SPDIP 400MHz Through Hole - -
RS-stocknr. 770-9704
FabrikantnummerMCP23008-E/ML
FabrikantMicrochip
0,98 €
Each (In a Pack of 5)
Aantal stuks
8 I2C 20 QFN 1.7MHz Surface Mount 5.5 V 1.8 V
RS-stocknr. 145-8960
FabrikantnummerMCP23018-E/SP
FabrikantMicrochip
1,277 €
Each (In a Tube of 15)
Aantal stuks
16 I2C 28 SPDIP 3.4MHz Through Hole - -