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. 806-3251
Mfr. Part No.MC14503BDG
TWD17.40
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. 163-0540
Mfr. Part No.MC14503BDR2G
TWD7.20
Each (On a Reel of 2500)
units
CMOS Buffer - 6 No - 3 State Non-Inverting Surface Mount SOIC 16 19.2mA -8.2mA 200ns
RS Stock No. 806-3254
Mfr. Part No.MC14503BDR2G
TWD20.60
Each (In a Pack of 20)
units
CMOS Buffer - 6 No - 3 State Non-Inverting Surface Mount SOIC 16 19.2mA -8.2mA 200ns
RS Stock No. 184-4254
Mfr. Part No.MC14050BDG
TWD11.40
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
TWD12.90
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
TWD16.00
Each
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 140 ns @ 5 V
RS Stock No. 163-0528
Mfr. Part No.MC14050BDR2G
TWD4.30
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. 903-4324
Mfr. Part No.MM74HCT541WMX
TWD20.10
Each (In a Pack of 25)
units
74HC - - - - - - - Surface Mount SOIC 20 7.2mA 7.2mA 45 ns@ 150 pF
RS Stock No. 166-3308
Mfr. Part No.MM74HCT541WMX
TWD10.80
Each (On a Reel of 1000)
units
74HC - - - - - - - Surface Mount SOIC 20 7.2mA 7.2mA 45 ns @ 150 pF
RS Stock No. 802-1409
Mfr. Part No.74VHC541M
TWD20.20
Each (In a Tube of 36)
units
74VHC Buffer, Line Driver - 8 No TTL 3 State Non-Inverting Surface Mount SOIC 20 -8mA 8mA 12 ns @ 50 pF
RS Stock No. 806-1179
Mfr. Part No.NC7WZ07FHX
TWD16.00
Each (On a Tape of 50)
units
TinyLogic UHS Buffer - 2 No Single Ended Open Drain Non-Inverting Surface Mount MicroPak 6 - 32mA 12.6ns
RS Stock No. 166-3736
Mfr. Part No.NC7SP34P5X
TWD3.00
Each (On a Reel of 3000)
units
TinyLogic ULP Buffer - 1 No Power Down High Impedance Power Down High Impedance Non-Inverting Surface Mount SC-70 5 -2.6mA 2.6mA 46.3ns
RS Stock No. 162-9371
Mfr. Part No.M74VHC1GT125DF2G
TWD1.30
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. 805-3009
Mfr. Part No.NLU2G16MUTCG
TWD16.20
Each (In a Pack of 25)
units
NLU Buffer - 2 No Single Ended CMOS Non-Inverting Surface Mount UDFN 6 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 802-1434
Mfr. Part No.74VHCT244AMTC
TWD15.20
Each (In a Tube of 73)
units
74VHCT Buffer, Line Driver - 8 No TTL 3 State Non-Inverting Surface Mount TSSOP 20 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 166-3737
Mfr. Part No.NC7SV126P5X
TWD3.20
Each (On a Reel of 3000)
units
TinyLogic ULP-A Buffer - 1 No Power Down High Impedance 3 State Non-Inverting Surface Mount SC-70 5 -24mA 24mA 4.6ns
RS Stock No. 791-6044
Mfr. Part No.M74VHC1GT125DF2G
TWD2.50
Each (In a Pack 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
TWD1.30
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. 162-8900
Mfr. Part No.M74VHC1G125DTT1G
TWD1.80
Each (On a Reel of 3000)
units
VHC Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount TSOP 5 -8mA 8mA 16 ns @ 50 pF
RS Stock No. 805-1778
Mfr. Part No.NL27WZ16DTT1G
TWD10.70
Each (On a Tape of 50)
units
LCX Buffer - 2 No Single Ended CMOS, Single Ended - Surface Mount TSOP 6 -32mA 32mA 10.2 ns @ 15 pF