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. 165-8732
Mfr. Part No.74LVC2T45DC,125
BrandNexperia
SGD0.553
Each (On a Reel of 3000)
units
LVC Transceiver - 4 - Single Ended 3 State Inverting Surface Mount VSSOP 8 -32mA 32mA 37.8ns
RS Stock No. 816-8842
Mfr. Part No.74LVC2T45DC,125
BrandNexperia
SGD0.77
Each (In a Pack of 10)
units
LVC Transceiver - 4 - Single Ended 3 State Inverting Surface Mount VSSOP 8 -32mA 32mA 37.8ns
RS Stock No. 162-6736
Mfr. Part No.SN74LVT16244BDGGR
SGD1.628
Each (On a Reel of 2000)
units
74LVT Buffer - - No CMOS, TTL 3 State Non-Inverting Surface Mount TSSOP 48 -32mA 64mA 3.2 ns @ 3.3 V
RS Stock No. 145-2970
Mfr. Part No.MC74ACT125DG
Brandonsemi
SGD0.722
Each (In a Tube of 55)
units
ACT Buffer - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 24mA -24mA 10 ns @ 50 pF
RS Stock No. 791-6053
Mfr. Part No.M74VHC1GT126DF1G
Brandonsemi
SGD0.185
Each (On a Tape of 100)
units
LSTTL Buffer - 1 No Single Ended Single Ended Non-Inverting Surface Mount SC-70 5 - - 16ns
RS Stock No. 162-9372
Mfr. Part No.M74VHC1GT126DF1G
Brandonsemi
SGD0.074
Each (On a Reel of 3000)
units
LSTTL Buffer - 1 No Single Ended Single Ended Non-Inverting Surface Mount SC-70 5 - - 16ns
RS Stock No. 806-2267
Mfr. Part No.MC74ACT125DG
Brandonsemi
SGD0.722
Each (In a Pack of 25)
units
ACT Buffer - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 24mA -24mA 10 ns @ 50 pF
RS Stock No. 796-8278
Mfr. Part No.SN74LVT16244BDGGR
SGD2.94
Each (In a Pack of 2)
units
74LVT Buffer - - No CMOS, TTL 3 State Non-Inverting Surface Mount TSSOP 48 -32mA 64mA 3.2 ns @ 3.3 V
RS Stock No. 531-6647
Mfr. Part No.TC4049BP(F)
BrandToshiba
SGD0.891
Each (In a Pack of 10)
units
4000 Buffer, Converter - 6 - Single Ended - Inverting Through Hole PDIP 16 -4.8mA 28mA 120 ns @ 5 V, 50 ns @ 15 V, 65 ns @ 10 V
RS Stock No. 145-5724
Mfr. Part No.SN74LVT125D
SGD1.334
Each (In a Tube of 50)
units
LVT Buffer, Line Driver - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -32mA 64mA 2.9 ns @ 3.3 V
RS Stock No. 662-8266
Mfr. Part No.SN74HCT125DR
SGD0.644
Each (In a Pack of 10)
units
HCT Buffer, Line Driver Buffer & Line Driver - - Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -6mA 6mA 36 ns @ 4.5 V
RS Stock No. 162-5263
Mfr. Part No.SN74AHC1G125DCKR
SGD0.059
Each (On a Reel of 3000)
units
AHC - - - - - - - Surface Mount SC-70 5 -8mA 8mA 11.5 ns @ 3.3 V
RS Stock No. 197-2962
Mfr. Part No.SN74LVT125D
SGD1.98
Each
units
LVT Buffer, Line Driver - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -32mA 64mA 2.9 ns @ 3.3 V
RS Stock No. 179-2131
Mfr. Part No.SN74HCT125DR
SGD0.472
Each (In a Tube of 50)
units
HCT - - - - - - - Surface Mount SOIC 14 -6mA 6mA 36 ns @ 4.5 V
RS Stock No. 145-3320
Mfr. Part No.M74VHC1G125DFT2G
Brandonsemi
SGD0.065
Each (On a Reel of 3000)
units
VHC Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount SC-88A 5 -8mA 8mA 16 ns @ 50 pF
RS Stock No. 145-4198
Mfr. Part No.NL17SZ17XV5T2G
Brandonsemi
SGD0.116
Each (On a Reel of 4000)
units
LCX Schmitt Trigger Buffer - 1 Yes Single Ended Single Ended Non-Inverting Surface Mount SOT-553 5 -32mA 32mA 15.6 ns @ 15 pF
RS Stock No. 186-7333
Mfr. Part No.NL17SZ07DFT2G
Brandonsemi
SGD0.063
Each (On a Reel of 3000)
units
- Buffer - 1 - Single Open Drain Non-Inverting Surface Mount SC 5 - 32mA 9.5 ns @ 50 pF
RS Stock No. 802-1305
Mfr. Part No.74LVX244MTC
Brandonsemi
SGD1.069
Each (In a Tube of 73)
units
74LVX Buffer, Line Driver - 8 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 20 -4mA 4mA 17 ns @ 50 pF
RS Stock No. 802-1604
Mfr. Part No.NL17SZ125DFT2G
Brandonsemi
SGD0.175
Each (On a Tape of 200)
units
NL Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount SC-88A 5 -32mA 32mA 10.5 ns @ 15 pF
RS Stock No. 483-6689
Mfr. Part No.74HC7541D,112
BrandNexperia
SGD2.678
Each (In a Pack of 5)
units
HC Buffer, Line Driver - 8 Yes Single Ended 3 State Non-Inverting Surface Mount SOIC 20 -7.8mA 7.8mA 120 ns @ 2 V