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 133-0706
Référence fabricantTCA9538DBR
0,44 €
Each (In a Pack of 5)
Unité
8 I2C, Parallel 16 SSOP 100 (Standard) kHz, 400 (Fast) kHz Surface Mount 5.5 V 1.65 V
N° de stock RS 669-6461
Référence fabricantMCP23S18-E/SO
MarqueMicrochip
1,41 €
Each (In a Pack of 2)
Unité
16 SPI 28 SOIC 10MHz Surface Mount - -
N° de stock RS 510-857
Référence fabricantPCA9535PW,112
MarqueNXP
1,672 €
Each (In a Pack of 5)
Unité
16 I2C, SMBus 24 TSSOP 400kHz Surface Mount 5 V, 5.5 V 2.3 V
N° de stock RS 862-9249
Référence fabricantFXL6408UMX
0,758 €
Each (In a Pack of 10)
Unité
8 I2C 16 UMLP 400kHz Surface Mount 3.6 V 1.65 V
N° de stock RS 124-2351
Référence fabricantPCA9535PW,112
MarqueNXP
1,418 €
Each (In a Tube of 63)
Unité
16 I2C, SMBus 24 TSSOP 400kHz Surface Mount 5 V, 5.5 V 2.3 V
N° de stock RS 124-2337
Référence fabricantP82B715TD,112
MarqueNXP
2,396 €
Each (In a Tube of 100)
Unité
- I2C, SMBus 8 SOIC 400kHz Surface Mount - -
N° de stock RS 727-5706
Référence fabricantPCA9554ABS,118
MarqueNXP
1,45 €
Each (On a Tape of 2)
Unité
- I2C, SMBus - HVQFN - Surface Mount - -
N° de stock RS 483-7193
Référence fabricantPCA9555D,112
MarqueNXP
1,85 €
Each
Unité
16 I2C, SMBus 24 SOIC 400kHz Surface Mount 5.5 V 2.3 V
N° de stock RS 124-1424
Référence fabricantFXL6408UMX
0,453 €
Each (On a Reel of 5000)
Unité
8 I2C 16 UMLP 400kHz Surface Mount 3.6 V 1.65 V
N° de stock RS 103-8077
Référence fabricantPCA9554ABS,118
MarqueNXP
0,876 €
Each (On a Reel of 6000)
Unité
- I2C, SMBus - HVQFN - Surface Mount - -
N° de stock RS 403-812
Référence fabricantMCP23S08-E/SO
MarqueMicrochip
1,012 €
Each (In a Pack of 5)
Unité
8 SPI 18 SOIC 10MHz Surface Mount - -
N° de stock RS 681-1143
Référence fabricantMCP23016-I/SP
MarqueMicrochip
1,475 €
Each (In a Pack of 2)
Unité
16 I2C 28 SPDIP 400MHz Through Hole - -
N° de stock RS 922-3356
Référence fabricantPCF8575CDW
2,63 €
Each (In a Tube of 25)
Unité
- - - - - - - -
N° de stock RS 121-7978
Référence fabricantPCA9535ECDTR2G
0,644 €
Each (On a Reel of 2500)
Unité
16 I2C 24 TSSOP 1MHz Surface Mount 5.5 V 1.65 V
N° de stock RS 517-0671
Référence fabricantPCF8574DW
1,73 €
Each (In a Pack of 5)
Unité
- I2C 16 SOIC - Surface Mount - -
N° de stock RS 887-7426
Référence fabricantMCP23016-I/SO
MarqueMicrochip
1,121 €
Each (In a Tube of 27)
Unité
16 I2C 28 SOIC 1MHz Surface Mount - -
N° de stock RS 166-0320
Référence fabricantPCA9554BS,118
MarqueNXP
0,683 €
Each (On a Reel of 6000)
Unité
8 I2C, SMBus 16 HVQFN 400kHz Surface Mount 5.5 V 2.3 V
N° de stock RS 190-6105
Référence fabricantMAX7300AAI+
4,085 €
Each (In a Tube of 46)
Unité
20 Serial I2C 28 SSOP 400kHz Surface Mount 5.5 V 2.5 V
N° de stock RS 669-6455
Référence fabricantMCP23018-E/SP
MarqueMicrochip
1,404 €
Each (In a Pack of 5)
Unité
16 I2C 28 SPDIP 3.4MHz Through Hole - -
N° de stock RS 770-9707
Référence fabricantMCP23008-E/SS
MarqueMicrochip
0,98 €
Each (In a Pack of 5)
Unité
8 I2C 20 SSOP 1.7MHz Surface Mount 5.5 V 1.8 V