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庫存編號 125-4197
製造零件編號CY8C9520A-24PVXI
HK$36.46
/個 (每包:2個)
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20 I2C 28 SSOP 100kHz Surface Mount 5.25 V 3 V
RS庫存編號 125-4198
製造零件編號CY8C9540A-24PVXI
HK$65.23
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40 I2C 48 SSOP 100kHz Surface Mount 5.25 V 3 V
全新
RS庫存編號 188-5383
製造零件編號CY8C9540A-24PVXI
HK$61.155
毎管:30 個
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40 I2C 48 SSOP 24MHz Surface Mount 5.25 V 3 V
全新
RS庫存編號 188-5382
製造零件編號CY8C9520A-24PVXI
HK$33.947
毎管:47 個
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20 I2C 28 SSOP 24MHz Surface Mount 5.25 V 3 V