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. 725-8751
Mfr. Part No.PCA9600D,112
BrandNXP
kr 34,24
Each
Units
CMOS, TTL - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 124-2357
Mfr. Part No.PCA9600D,112
BrandNXP
kr 20,309
Each (In a Tube of 100)
Units
CMOS, TTL - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 802-1222
Mfr. Part No.74LCX240MTC
kr 5,047
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. 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 60 ns @ 15 V, 80 ns @ 10 V, 140 ns @ 5 V
RS Stock No. 812-2650
Mfr. Part No.P82B715P
kr 28,70
Each
Units
P82B - - - - - - - Through Hole PDIP 8 - - -
RS Stock No. 921-2858
Mfr. Part No.P82B715P
kr 24,506
Each (In a Tube of 50)
Units
P82B - - - - - - - Through Hole PDIP 8 - - -
RS Stock No. 121-9368
Mfr. Part No.P82B96P
kr 28,026
Each (In a Tube of 50)
Units
P82B96 - - - - - - - Through Hole PDIP 8 - 3mA 270ns
RS Stock No. 806-4015
Mfr. Part No.MC74VHC1G50DFT2G
kr 0,264
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. 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 60 ns @ 15 V, 80 ns @ 10 V, 140 ns @ 5 V
RS Stock No. 662-9045
Mfr. Part No.SN74LVC3G17DCTR
kr 6,348
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. 662-8944
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. 121-9225
Mfr. Part No.SN74LVC3G17DCTR
kr 2,212
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. 922-2861
Mfr. Part No.SN74LVC2G17DBVT
kr 6,134
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. 145-3695
Mfr. Part No.MC74VHC1G50DFT2G
kr 0,258
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. 812-2662
Mfr. Part No.P82B96P
kr 33,16
Each
Units
P82B96 - - - - - - - Through Hole PDIP 8 - 3mA 270ns
RS Stock No. 806-3973
Mfr. Part No.MC74VHC1G07DFT1G
kr 0,915
Each (On a Tape of 100)
Units
VHC Buffer - 1 No Single Ended Open Drain Non-Inverting Surface Mount SC-88A 5 - 8mA 14.5 ns @ 50 pF (Enable Time)
RS Stock No. 688-1515
Mfr. Part No.MC14049BDG
kr 4,436
Each (In a Pack of 5)
Units
4000 Buffer, Converter - 6 No Single Ended - Inverting Surface Mount SOIC 16 - - 140 ns @ 5 V
RS Stock No. 816-8741
Mfr. Part No.74LVC1G07GV,125
BrandNexperia
kr 1,332
Each (In a Pack of 100)
Units
LVC Buffer - 1 No Single Ended Open Drain Non-Inverting Surface Mount SC-74A 5 - 32mA 8.4ns
RS Stock No. 166-2085
Mfr. Part No.NC7NZ34L8X
kr 1,252
Each (On a Reel of 5000)
Units
TinyLogic UHS Buffer - 3 No Power Down High Impedance Power Down High Impedance Non-Inverting Surface Mount MicroPak 8 -32mA 32mA 5.1ns
RS Stock No. 662-8966
Mfr. Part No.SN74LVC2G34DCKR
kr 4,174
Each (In a Pack of 5)
Units
LVC Buffer - 2 No Single Ended - Non-Inverting Surface Mount SC-70 6 -32mA 32mA 4.1 ns @ 3.3 V