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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Description Price Number of I/O Channels Interface Number of Pins Package Type Clock Frequency Mounting Type Maximum Supply Voltage Minimum Supply Voltage Priced to Clear
RS Stock No. 146-1223
Mfr. Part No.MAX7301AAX+
£4.273
Each (In a Tube of 30)
Units
- - 36 SSOP - Surface Mount - - -
RS Stock No. 622-9500
Mfr. Part No.MAX7301AAX+
£6.11
Each
Units
- - 36 SSOP - Surface Mount - - -
RS Stock No. 786-1269
Mfr. Part No.MAX7317ATE+
£2.40
Each (In a Pack of 2)
Units
10 Serial-SPI 16 TQFN 26MHz Surface Mount 3.6 V 2.25 V -
RS Stock No. 165-9501
Mfr. Part No.MAX7317ATE+
£1.75
Each (In a Tube of 100)
Units
10 Serial-SPI 16 TQFN 26MHz Surface Mount 3.6 V 2.25 V -
RS Stock No. 799-3167
Mfr. Part No.MAX7311AWG+
£4.085
Each (In a Pack of 2)
Units
16 Serial-2 Wire 24 SOIC 400kHz Surface Mount 5.5 V 2 V -
RS Stock No. 923-7810
Mfr. Part No.MAX7311AWG+
£3.51
Each (In a Tube of 30)
Units
16 Serial-2 Wire 24 SOIC 400kHz Surface Mount 5.5 V 2 V -
New
RS Stock No. 191-4975
Mfr. Part No.MAX7315AUE+
£2.236
Each (In a Pack of 5)
Units
8 Serial-2 Wire 16 TSSOP 400kHz Surface Mount 3.6 V 2 V -
New
RS Stock No. 190-6106
Mfr. Part No.MAX7300AAX+
£6.049
Each (In a Tube of 30)
Units
28 - 36 SSOP 400kHz Surface Mount 5.5 V 2.5 V -
New
RS Stock No. 190-0469
Mfr. Part No.MAX7312ATG+
£3.355
Each (In a Pack of 2)
Units
16 Serial-2 Wire 24 TQFN 400kHz Surface Mount 5.5 V 2 V -
New
RS Stock No. 190-7057
Mfr. Part No.MAX7321ATE+
£1.69
Each (In a Pack of 5)
Units
- - - - - - - - -
New
RS Stock No. 190-6107
Mfr. Part No.MAX7300ATL+
£5.253
Each (In a Tube of 50)
Units
28 - 40 TQFN 400kHz Surface Mount 5.5 V 2.5 V -
New
RS Stock No. 190-6900
Mfr. Part No.MAX7301ATL+T
£5.86
Each (In a Pack of 2)
Units
- - - - - - - - -
New
RS Stock No. 190-0530
Mfr. Part No.MAX7313ATG+
£3.035
Each (In a Pack of 2)
Units
16 Serial-I2C (2-Wire) 24 TQFN 400kHz Surface Mount 3.6 V 2 V -
New
RS Stock No. 190-6108
Mfr. Part No.MAX7301ATL+T
£4.205
Each (On a Reel of 2500)
Units
28 - 40 TQFN - Surface Mount 5.5 V 2.5 V -
New
RS Stock No. 190-6111
Mfr. Part No.MAX7311ATG+
£3.162
Each (In a Tube of 75)
Units
16 - 24 TQFN 400kHz Surface Mount 5.5 V 2 V -
New
RS Stock No. 189-7055
Mfr. Part No.MAX7313ATG+
£2.576
Each (In a Tube of 75)
Units
16 Serial-2 Wire 24 TQFN 400kHz Surface Mount 3.6 V 2 V -
New
RS Stock No. 191-3756
Mfr. Part No.DS2482S-800+T&R
£6.30
Each
Units
8 I2C 16 SO 400kHz Surface Mount 5.5 V 4.5 V -
New
RS Stock No. 190-6114
Mfr. Part No.MAX7318AUG+
£2.244
Each (In a Tube of 62)
Units
16 - 24 TSSOP 400kHz Surface Mount 5.5 V 2 V -
New
RS Stock No. 189-7051
Mfr. Part No.MAX7301AAX+
£4.315
Each (In a Tube of 30)
Units
- - 36 SSOP - Surface Mount - - -
New
RS Stock No. 192-1858
Mfr. Part No.MAX7315ATE+
£1.476
Each (In a Tube of 100)
Units
8 Serial-2 Wire 16 QFN 400kHz Surface Mount 3.6 V 2 V -