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 Prix Number of I/O Channels Interface Number of Pins Package Type Clock Frequency Mounting Type Maximum Supply Voltage Minimum Supply Voltage
N° de stock RS 162-8708
Référence fabricantTCA6416ARTWR
0,616 €
Each (On a Reel of 3000)
Unité
16 I2C, Serial 24 WQFN 400kHz Surface Mount 5.5 V 1.65 V
N° de stock RS 124-2352
Référence fabricantPCA9539PW,112
MarqueNXP
1,057 €
Each (In a Tube of 63)
Unité
- - 24 TSSOP - Surface Mount - -
N° de stock RS 177-2845
Référence fabricantMCP23008T-E/SO
MarqueMicrochip
0,71 €
Each (On a Reel of 1100)
Unité
8 I2C 18 SOIC 10MHz Surface Mount 5.5 V 1.8 V
N° de stock RS 190-0596
Référence fabricantMAX7318ATG+
3,735 €
Each (In a Pack of 2)
Unité
16 Serial-2 Wire 24 QFN 400kHz Surface Mount 5.5 V 2 V
N° de stock RS 510-914
Référence fabricantPCA9536DP,118
MarqueNXP
0,95 €
Each (In a Pack of 5)
Unité
4 - 8 TSSOP 400kHz Surface Mount 5.5 V 2.3 V
N° de stock RS 124-9971
Référence fabricantCAT9554YI-GT2
0,614 €
Each (On a Reel of 2000)
Unité
8 I2C, SMBus 16 TSSOP 400kHz Surface Mount 5.5 V 2.3 V
N° de stock RS 177-2846
Référence fabricantMCP23017T-E/ML
MarqueMicrochip
0,973 €
Each (On a Reel of 1600)
Unité
16 I2C 28 QFN 10MHz Surface Mount 5.5 V 1.8 V
N° de stock RS 190-6955
Référence fabricantMAX7311AAG+
4,445 €
Each (In a Pack of 2)
Unité
- - - - - - - -
N° de stock RS 920-3371
Référence fabricantPCF8574ADW
1,153 €
Each (In a Tube of 40)
Unité
- - 16 SOIC - Surface Mount - -
N° de stock RS 823-4220
Référence fabricantPCA9535ECMTTXG
0,693 €
Each (In a Pack of 10)
Unité
16 I2C 24 QFN 1MHz Surface Mount 5.5 V 1.65 V
N° de stock RS 511-068
Référence fabricantPCA9698DGG,512
MarqueNXP
4,59 €
Each
Unité
40 - 56 TSSOP 1MHz Surface Mount 5.5 V 2.3 V
N° de stock RS 770-9729
Référence fabricantMCP23018-E/SS
MarqueMicrochip
1,483 €
Each (In a Pack of 3)
Unité
16 I2C 24 SSOP 3.4MHz Surface Mount 5.5 V 1.8 V
N° de stock RS 191-3756
Référence fabricantDS2482S-800+T&R
6,51 €
Each
Unité
8 I2C 16 SO 400kHz Surface Mount 5.5 V 4.5 V
N° de stock RS 887-7319
Référence fabricantMCP23S17-E/SS
MarqueMicrochip
0,987 €
Each (In a Tube of 47)
Unité
16 Serial-SPI 28 SSOP 5MHz Surface Mount - -
N° de stock RS 661-3368
Référence fabricantPCA9536DGKR
0,91 €
Each (In a Pack of 5)
Unité
4 I2C, SMBus kHz 8 MSOP 400kHz Surface Mount - -
N° de stock RS 727-5670
Référence fabricantPCA9518PW,112
MarqueNXP
1,69 €
Each (In a Pack of 2)
Unité
- - - TSSOP - Surface Mount - -
N° de stock RS 190-6115
Référence fabricantMAX7321ATE+
1,364 €
Each (In a Tube of 100)
Unité
8 Serial-I2C (2-Wire) 16 TQFN 400kHz Surface Mount 5.5 V 1.71 V
N° de stock RS 177-3316
Référence fabricantMCP23017T-E/SS
MarqueMicrochip
1,141 €
Each (In a Pack of 10)
Unité
16 I2C 28 SSOP 10MHz Surface Mount 5.5 V 1.8 V
N° de stock RS 191-4975
Référence fabricantMAX7315AUE+
2,422 €
Each (In a Pack of 5)
Unité
8 Serial-2 Wire 16 TSSOP 400kHz Surface Mount 3.6 V 2 V
N° de stock RS 770-9723
Référence fabricantMCP23S08-E/ML
MarqueMicrochip
0,924 €
Each (In a Pack of 5)
Unité
8 Serial-SPI 20 QFN 10MHz Surface Mount 5.5 V 1.8 V