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
€0.37
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. 121-9220
Mfr. Part No.SN74LVC1G17DCKT
€0.361
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. 483-7913
Mfr. Part No.HEF4050BT,652
BrandNexperia
€0.331
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. 124-2311
Mfr. Part No.HEF4050BT,652
BrandNexperia
€0.331
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. 662-9616
Mfr. Part No.CD4041UBE
€1.208
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. 806-4015
Mfr. Part No.MC74VHC1G50DFT2G
€0.024
Each (On a Tape of 100)
units
VHC Buffer - 1 No CMOS Bipolar Schottky TTL, CMOS Non-Inverting Surface Mount SC-88A 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 163-0528
Mfr. Part No.MC14050BDR2G
€0.118
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. 806-3188
Mfr. Part No.MC14050BDR2G
€0.33
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. 145-3695
Mfr. Part No.MC74VHC1G50DFT2G
€0.028
Each (On a Reel of 3000)
units
VHC Buffer - 1 No CMOS Bipolar Schottky TTL, CMOS Non-Inverting Surface Mount SC-88A 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 662-8742
Mfr. Part No.SN74LVC1G17DCKT
€0.678
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. 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. 144-9937
Mfr. Part No.CD4049UBD
€0.424
Each (In a Tube of 40)
units
4000 Buffer, Converter - 6 - Single Ended - Inverting Surface Mount SOIC 16 -5.2mA 26mA 50 ns @ 15 V, 65 ns @ 10 V, 120 ns @ 5 V
RS Stock No. 184-4254
Mfr. Part No.MC14050BDG
€0.313
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. 796-8265
Mfr. Part No.SN74LVC2G125DCUR
€0.32
Each (In a Pack of 10)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns@ 5 V
RS Stock No. 145-0136
Mfr. Part No.CD4041UBE
€1.024
Each (In a Tube of 25)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Through Hole PDIP 14 - - 120 ns @ 5 V
RS Stock No. 796-8240
Mfr. Part No.SN74LVC1G126DBVR
€0.193
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. 162-6725
Mfr. Part No.SN74LVC2G125DCUR
€0.123
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns @ 5 V
RS Stock No. 917-5541
Mfr. Part No.NC7NZ17K8X
€0.088
Each (In a Pack of 50)
units
TinyLogic UHC Buffer - 3 Yes Schmitt Trigger CMOS Non-Inverting Surface Mount JEDEC MO-187 8 -32mA 32mA 13.1 ns @ 15 pF
RS Stock No. 162-6704
Mfr. Part No.SN74LVC1G126DBVR
€0.043
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. 662-9638
Mfr. Part No.CD4049UBD
€0.53
Each (In a Pack of 5)
units
4000 Buffer, Converter - 6 - Single Ended - Inverting Surface Mount SOIC 16 -5.2mA 26mA 50 ns @ 15 V, 65 ns @ 10 V, 120 ns @ 5 V