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. 124-2357
Mfr. Part No.PCA9600D,112
BrandNXP
kr 34,632
Each (In a Tube of 100)
Units
CMOS, TTL - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 725-8751
Mfr. Part No.PCA9600D,112
BrandNXP
kr 37,29
Each
Units
CMOS, TTL - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 802-1222
Mfr. Part No.74LCX240MTC
Brandonsemi
kr 5,768
Each (In a Tube of 73)
Units
74LCX Buffer, Driver - 8 No Single Ended 3 State Inverting Surface Mount TSSOP 20 -24mA 24mA 7.5 ns @ 50 pF
RS Stock No. 812-2650
Mfr. Part No.P82B715P
kr 35,33
Each
Units
P82B - - - - - - - Through Hole PDIP 8 - - -
RS Stock No. 922-2861
Mfr. Part No.SN74LVC2G17DBVT
kr 7,42
Each (On a Reel of 250)
Units
LVC Schmitt Trigger Buffer - 2 Yes Single Ended - Non-Inverting Surface Mount SOT-23 6 -32mA 32mA 5.4 ns @ 3.3 V
RS Stock No. 812-2662
Mfr. Part No.P82B96P
kr 44,79
Each
Units
P82B96 - - - - - - - Through Hole PDIP 8 - 3mA 270ns
RS Stock No. 162-7234
Mfr. Part No.CD4009UBM
kr 3,253
Each (In a Tube of 40)
Units
4000 Buffer, Converter - 6 - Single Ended - Inverting Surface Mount SOIC 16 -1.65mA 30mA 140 ns @ 5 V, 60 ns @ 15 V, 80 ns @ 10 V
RS Stock No. 121-9225
Mfr. Part No.SN74LVC3G17DCTR
kr 2,511
Each (On a Reel of 3000)
Units
LVC Schmitt Trigger Buffer - 3 Yes Single Ended - Non-Inverting Surface Mount SSOP 8 -32mA 32mA 5.4 ns @ 3.3 V
RS Stock No. 921-2858
Mfr. Part No.P82B715P
kr 29,831
Each (In a Tube of 50)
Units
P82B - - - - - - - Through Hole PDIP 8 - - -
RS Stock No. 662-8944
Mfr. Part No.SN74LVC2G17DBVT
kr 11,414
Each (In a Pack of 5)
Units
LVC Schmitt Trigger Buffer - 2 Yes Single Ended - Non-Inverting Surface Mount SOT-23 6 -32mA 32mA 5.4 ns @ 3.3 V
RS Stock No. 662-9045
Mfr. Part No.SN74LVC3G17DCTR
kr 6,544
Each (In a Pack of 5)
Units
LVC Schmitt Trigger Buffer - 3 Yes Single Ended - Non-Inverting Surface Mount SSOP 8 -32mA 32mA 5.4 ns @ 3.3 V
RS Stock No. 662-9496
Mfr. Part No.CD4009UBM
kr 4,366
Each (In a Pack of 5)
Units
4000 Buffer, Converter - - - Single Ended - Inverting Surface Mount SOIC 16 -1.65mA 30mA 140 ns @ 5 V, 60 ns @ 15 V, 80 ns @ 10 V
RS Stock No. 121-9368
Mfr. Part No.P82B96P
kr 37,911
Each (In a Tube of 50)
Units
P82B96 - - - - - - - Through Hole PDIP 8 - 3mA 270ns
RS Stock No. 791-6053
Mfr. Part No.M74VHC1GT126DF1G
Brandonsemi
kr 1,131
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. 124-9989
Mfr. Part No.M74VHC1GT50DTT1G
Brandonsemi
kr 0,973
Each (On a Reel of 3000)
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. 802-1279
Mfr. Part No.74LVT244WM
Brandonsemi
kr 7,643
Each (In a Tube of 36)
Units
74LVT Buffer, Line Driver - 8 No Single Ended 3 State Non-Inverting Surface Mount SOIC 20 -32mA 64mA 4.2 ns @ 50 pF
RS Stock No. 805-6389
Mfr. Part No.MC74VHC50DG
Brandonsemi
kr 1,00
Each (In a Pack of 55)
Units
- Buffer - 6 No Single Ended Single Ended Non-Inverting Surface Mount SOIC 14 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 806-3848
Mfr. Part No.MC74LVX541DWG
Brandonsemi
kr 7,43
Each (In a Pack of 38)
Units
LVX - - - - - - - Surface Mount SOIC 20 -4mA 4mA 12 ns @ 50 pF
RS Stock No. 806-3251
Mfr. Part No.MC14503BDG
Brandonsemi
kr 4,001
Each (In a Pack of 20)
Units
CMOS Buffer - 6 No Single Ended 3 State Non-Inverting Surface Mount SOIC 16 19.2mA -8.2mA 200ns
RS Stock No. 171-3045
Mfr. Part No.TC7WH17FU
BrandToshiba
kr 0,957
Each (On a Reel of 3000)
Units
- - - 1 Yes CMOS, Schmitt Trigger CMOS Non-Inverting Surface Mount SOT-505 8 -8mA 8mA 17 ns @ 15 pF