Buffers

Buffers, also known as logic buffers are semiconductor IC (integrated circuit) that are constructed of two inverters that are back to back providing a basic logic gate that passes its input, unchanged, to its output. Buffer ICs are also available in both inverting and non-inverting.

How do buffers work?

The primary purpose of a buffer IC is to regenerate the input, primarily using a strong low and high and also to regenerate weak output from non-restoring logic. They are also used to increase the propagation delay of circuits by driving the large capacitive load.

Buffers also feature transceivers and drivers that are used to regenerate the input utilising a strong high and a strong low. Buffer gates serve as an amplifier of a weak signal source is cant source a lot of current whilst increasing the current capacity of the signal so as to be able to drive a load.

Types of buffers

Buffers are available with a variety of configurations such as variations on the number of channels available, supporting a variety of different inputs and outputs such as CMOS, DTL (Diode-Transistor Logic) and single-ended and providing support for a range of logic families such as HC, HEF and TTL. Buffers are also available in combination with a converter.

Another type of buffer that is available is Bus buffers. A bus buffer is an IC that connects multiple data sources to a single bus. The open drivers can be selected to be either a logical high, a logical low, or high impedance which allows other buffers to drive the bus. Like buffers, variations of bus buffers are available such as support for different logic families, inputs, outputs as well as the number of pins configured on the IC.

Bus buffers are used in applications such as TV and video equipment, industrial controls and portable equipment.

Application

Buffers have a wide range of application use such as;

  • Automatic test equipment
  • Board test systems
  • Instrumentation and characterization equipment
  • Semiconductor test systems

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Description Price Logic Family Logic Function IC Type Number of Channels Schmitt Trigger Input Input Type Output Type Polarity Mounting Type Package Type Pin Count Maximum High Level Output Current Maximum Low Level Output Current Maximum Propagation Delay Time @ Maximum CL
RS Stock No. 145-0019
Mfr. Part No.CD74HC4050E
€0.455
Each (In a Tube of 25)
units
HC Buffer, Converter - 6 - Single Ended - Non-Inverting Through Hole PDIP 16 -5.2mA 5.2mA 14 ns @ 6 V, 17 ns @ 4.5 V, 85 ns @ 2 V
RS Stock No. 162-6725
Mfr. Part No.SN74LVC2G125DCUR
€0.15
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns @ 5 V
RS Stock No. 121-9220
Mfr. Part No.SN74LVC1G17DCKT
€0.462
Each (On a Reel of 250)
units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SC-70 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 124-2311
Mfr. Part No.HEF4050BT,652
BrandNexperia
€0.396
Each (In a Tube of 50)
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 110 ns @ 5 V
RS Stock No. 662-9638
Mfr. Part No.CD4049UBD
€0.584
Each (In a Pack of 5)
units
4000 Buffer, Converter - 6 - Single Ended - Inverting Surface Mount SOIC 16 -5.2mA 26mA 120 ns @ 5 V, 50 ns @ 15 V, 65 ns @ 10 V
RS Stock No. 184-4254
Mfr. Part No.MC14050BDG
Brandonsemi
€0.323
Each (In a Tube of 48)
units
4000 Buffer - 6 - CMOS - Non-Inverting Surface Mount SOIC 16 -4.7mA 30mA 140 ns @ 50 pF
RS Stock No. 518-8953
Mfr. Part No.MC14050BDG
€0.35
Each
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 140 ns @ 5 V
RS Stock No. 162-6704
Mfr. Part No.SN74LVC1G126DBVR
€0.047
Each (On a Reel of 3000)
units
74LVC Buffer - 1 No CMOS, TTL 3 State Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 4.2 ns @ 5 V
RS Stock No. 144-9937
Mfr. Part No.CD4049UBD
€0.403
Each (In a Tube of 40)
units
4000 Buffer, Converter - 6 - Single Ended - Inverting Surface Mount SOIC 16 -5.2mA 26mA 120 ns @ 5 V, 50 ns @ 15 V, 65 ns @ 10 V
RS Stock No. 163-0528
Mfr. Part No.MC14050BDR2G
Brandonsemi
€0.133
Each (On a Reel of 2500)
units
CMOS Buffer - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 30mA -4.7mA 140ns
RS Stock No. 662-9616
Mfr. Part No.CD4041UBE
€1.406
Each (In a Pack of 5)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Through Hole PDIP 14 - - 120 ns @ 5 V
RS Stock No. 806-3188
Mfr. Part No.MC14050BDR2G
Brandonsemi
€0.322
Each (On a Tape of 50)
units
CMOS Buffer - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 30mA -4.7mA 140ns
RS Stock No. 796-8240
Mfr. Part No.SN74LVC1G126DBVR
€0.248
Each (In a Pack of 25)
units
74LVC Buffer - 1 No CMOS, TTL 3 State Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 4.2 ns @ 5 V
RS Stock No. 796-8265
Mfr. Part No.SN74LVC2G125DCUR
€0.33
Each (In a Pack of 10)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns@ 5 V
RS Stock No. 662-8742
Mfr. Part No.SN74LVC1G17DCKT
€0.742
Each (In a Pack of 5)
units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SC-70 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 483-7913
Mfr. Part No.HEF4050BT,652
BrandNexperia
€0.396
Each (In a Pack of 20)
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 110 ns @ 5 V
RS Stock No. 145-0136
Mfr. Part No.CD4041UBE
€1.20
Each (In a Tube of 25)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Through Hole PDIP 14 - - 120 ns @ 5 V
New
RS Stock No. 229-7038
Mfr. Part No.SN74LVC1G34DCKR
€0.085
Each (On a Reel of 3000)
units
74LVC Buffer Single Buffer Gate 1 No CMOS - - - SC-70 5 - - -
RS Stock No. 171-3132
Mfr. Part No.TC7SET34F
BrandToshiba
€0.055
Each (In a Pack of 50)
units
- Non-Inverting - 1 - CMOS CMOS, TTL Non-Inverting Surface Mount SOT-25 5 -8mA 8mA 13.5 ns @ 50 pF
RS Stock No. 171-3363
Mfr. Part No.74VHCT244AFT
BrandToshiba
€0.108
Each (On a Reel of 2500)
units
74VHCT - - - - - - - Surface Mount TSSOP 20 -8mA 8mA 10.5 ns @ 50 pF