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. 805-1560
Mfr. Part No.M74VHC1GT50DTT1G
£0.088
Each (In a Pack of 100)
Units
VHC Buffer - 1 No Single Ended CMOS, Single Ended Non-Inverting Surface Mount TSOP 5 -8mA 8mA 25.5 ns @ 50 pF
RS Stock No. 812-2650
Mfr. Part No.P82B715P
£2.76
Each
Units
P82B - - - - - - - Through Hole PDIP 8 - - -
RS Stock No. 921-2858
Mfr. Part No.P82B715P
£2.39
Each (In a Tube of 50)
Units
P82B - - - - - - - Through Hole PDIP 8 - - -
RS Stock No. 163-0528
Mfr. Part No.MC14050BDR2G
£0.107
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. 184-4254
Mfr. Part No.MC14050BDG
£0.297
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. 806-3188
Mfr. Part No.MC14050BDR2G
£0.297
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. 518-8953
Mfr. Part No.MC14050BDG
£0.40
Each
Units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 140 ns @ 5 V
RS Stock No. 816-8763
Mfr. Part No.74LVC1G17GV,125
BrandNexperia
£0.215
Each (In a Pack of 75)
Units
LVC Buffer - 1 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount SC-74A 5 -32mA 32mA 14ns
RS Stock No. 146-0913
Mfr. Part No.74LVC1G17GV,125
BrandNexperia
£0.046
Each (On a Reel of 3000)
Units
LVC Buffer - 1 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount SC-74A 5 -32mA 32mA 14ns
RS Stock No. 145-0136
Mfr. Part No.CD4041UBE
£0.968
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. 662-9616
Mfr. Part No.CD4041UBE
£1.126
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. 812-2662
Mfr. Part No.P82B96P
£2.78
Each
Units
P82B96 - - - - - - - Through Hole PDIP 8 - 3mA 270ns
RS Stock No. 121-9368
Mfr. Part No.P82B96P
£2.369
Each (In a Tube of 50)
Units
P82B96 - - - - - - - Through Hole PDIP 8 - 3mA 270ns
RS Stock No. 124-2339
Mfr. Part No.P82B96TD,112
BrandNXP
£1.975
Each (In a Tube of 100)
Units
LVC - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 483-6960
Mfr. Part No.P82B96TD,112
BrandNXP
£2.89
Each
Units
LVC - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 806-2964
Mfr. Part No.MM74HC540WM
£0.647
Each (In a Tube of 36)
Units
CMOS Buffer - 8 No LS-TTL 3 State Inverting Surface Mount SOIC 20 7.8mA 7.8mA 190 ns @ 50 pF
RS Stock No. 531-6647
Mfr. Part No.TC4049BP(F)
BrandToshiba
£0.255
Each (In a Pack of 10)
Units
4000 Buffer, Converter - 6 - Single Ended - Inverting Through Hole PDIP 16 -4.8mA 28mA 50 ns @ 15 V, 65 ns @ 10 V, 120 ns @ 5 V
RS Stock No. 662-8749
Mfr. Part No.SN74LVC1G17DBVT
£0.668
Each (In a Pack of 5)
Units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 169-5698
Mfr. Part No.SN74LVC1G17DBVT
£0.399
Each (On a Reel of 250)
Units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 122-1514
Mfr. Part No.74AHC125T14-13
£0.041
Each (On a Reel of 2500)
Units
AHC Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount TSSOP 14 -4mA 8mA 14.5 ns @ 50 pF