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 403-806
Référence fabricantMCP23017-E/SP
MarqueMicrochip
1,078 €
Each (In a Pack of 5)
Unité
16 I2C, Serial MHz 28 SPDIP 5MHz Through Hole - -
N° de stock RS 144-5723
Référence fabricantMCP23017-E/SP
MarqueMicrochip
1,078 €
Each (In a Tube of 15)
Unité
16 I2C, Serial MHz 28 SPDIP 5MHz Through Hole - -
N° de stock RS 165-4752
Référence fabricantMCP23008-E/P
MarqueMicrochip
0,817 €
Each (In a Tube of 25)
Unité
8 I2C, Serial MHz 18 PDIP 5MHz Through Hole - -
N° de stock RS 403-563
Référence fabricantMCP23008-E/P
MarqueMicrochip
0,842 €
Each (In a Pack of 5)
Unité
8 I2C, Serial MHz 18 PDIP 5MHz Through Hole - -
N° de stock RS 517-0700
Référence fabricantPCF8574PW
1,504 €
Each (In a Pack of 5)
Unité
- - 20 TSSOP - Surface Mount - -
N° de stock RS 517-0249
Référence fabricantPCF8574AN
1,31 €
Each
Unité
8 I2C, SMBus 16 PDIP 100kHz Through Hole - -
N° de stock RS 103-5690
Référence fabricantPCA9535D,112
MarqueNXP
1,325 €
Each (In a Tube of 30)
Unité
16 I2C, SMBus 24 SOIC 400kHz Surface Mount - -
N° de stock RS 168-5139
Référence fabricantPCF8574PW
1,063 €
Each (In a Tube of 70)
Unité
- - 20 TSSOP - Surface Mount - -
N° de stock RS 920-3374
Référence fabricantPCF8574AN
1,093 €
Each (In a Tube of 25)
Unité
8 I2C, SMBus 16 PDIP 100kHz Through Hole - -
N° de stock RS 483-7109
Référence fabricantPCA9535D,112
MarqueNXP
1,568 €
Each (In a Pack of 5)
Unité
16 I2C, SMBus 24 SOIC 400kHz Surface Mount - -
N° de stock RS 661-3380
Référence fabricantPCF8574PWR
1,346 €
Each (In a Pack of 5)
Unité
- - 20 TSSOP - Surface Mount - -
N° de stock RS 661-3441
Référence fabricantPCA9535DW
2,436 €
Each (In a Pack of 5)
Unité
- - 24 SOIC - Surface Mount - -
N° de stock RS 162-5843
Référence fabricantPCA9535DW
1,485 €
Each (In a Tube of 25)
Unité
- - 24 SOIC - Surface Mount - -
N° de stock RS 661-3371
Référence fabricantPCA9557PWR
1,302 €
Each (In a Pack of 5)
Unité
- - 16 TSSOP - Surface Mount - -
N° de stock RS 162-5477
Référence fabricantPCA9557PWR
0,648 €
Each (On a Reel of 2000)
Unité
- - 16 TSSOP - Surface Mount - -
N° de stock RS 912-6833
Référence fabricantMCP23S17-E/SP
MarqueMicrochip
1,127 €
Each (In a Tube of 15)
Unité
16 SPI 28 PDIP 10MHz Through Hole 5.5 V 1.8 V
N° de stock RS 823-4226
Référence fabricantPCA9535ECDWR2G
1,552 €
Each (In a Pack of 10)
Unité
16 I2C 24 SOIC 1MHz Surface Mount 5.5 V 1.65 V
N° de stock RS 163-0307
Référence fabricantPCA9535ECDWR2G
0,895 €
Each (On a Reel of 1000)
Unité
16 I2C 24 SOIC 1MHz Surface Mount 5.5 V 1.65 V
N° de stock RS 823-3523
Référence fabricantMCP23S17-E/SP
MarqueMicrochip
1,128 €
Each (In a Pack of 10)
Unité
16 SPI 28 PDIP 10MHz Through Hole 5.5 V 1.8 V
N° de stock RS 124-2356
Référence fabricantPCA9555PW,112
MarqueNXP
1,22 €
Each (In a Tube of 63)
Unité
16 I2C, SMBus 24 TSSOP 400kHz Surface Mount 5.5 V 2.3 V