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
RS stock no. 160-4441
Mfr. Part No.ADP5586ACBZ-00-R7
R 15.074
Each (On a Reel of 3000)
units
10 I2C 16 WLCSP 880kHz Surface Mount 3.6 V 1.65 V
RS stock no. 809-9812
Mfr. Part No.ADP5588ACPZ-R7
R 20.72
Each (In a Pack of 2)
units
18 I2C 24 LFCSP WQ 400kHz Surface Mount 3 V 1.7 V
RS stock no. 160-4440
Mfr. Part No.ADP5587ACPZ-R7
R 21.202
Each (On a Reel of 1500)
units
18 I2C 24 LFCSP WQ 400kHz Surface Mount 3.6 V 1.65 V
RS stock no. 160-3384
Mfr. Part No.ADP5588ACPZ-R7
R 20.465
Each (On a Reel of 1500)
units
18 I2C 24 LFCSP WQ 400kHz Surface Mount 3 V 1.7 V
RS stock no. 809-9815
Mfr. Part No.ADP5587ACPZ-R7
R 36.26
Each (In a Pack of 2)
units
18 I2C 24 LFCSP WQ 400kHz Surface Mount 3.6 V 1.65 V
RS stock no. 809-9819
Mfr. Part No.ADP5586ACBZ-00-R7
R 15.312
Each (In a Pack of 5)
units
10 I2C 16 WLCSP 880kHz Surface Mount 3.6 V 1.65 V