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. 805-2945
Mfr. Part No.NL17SV16XV5T2G
SGD0.571
Each (In a Pack of 50)
units
NL Buffer - 1 No Single Ended Single Ended Non-Inverting Surface Mount SOT-553 5 -24mA 24mA 6.2 ns @ 30 pF
RS Stock No. 171-3584
Mfr. Part No.74HC244D
BrandToshiba
SGD1.018
Each (In a Pack of 10)
units
74HC - - - - - - - Surface Mount SOIC 20 -7.8mA 7.8mA 165 ns @ 150 pF
RS Stock No. 896-6756
Mfr. Part No.TC7SH125FU,LJ(CT
BrandToshiba
SGD0.137
Each (In a Pack of 100)
units
VHC - - - - - - - Surface Mount SSOP 5 -8mA 8mA 13 ns@ 50 pF
RS Stock No. 169-7224
Mfr. Part No.74AHCT125S14-13
SGD0.175
Each (On a Reel of 2500)
units
AHCT Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount SOIC 14 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 171-3439
Mfr. Part No.74VHCT240AFT
BrandToshiba
SGD0.47
Each (In a Pack of 25)
units
74VHCT - - - - - - - Surface Mount TSSOP 20 -8mA 8mA 11 ns @ 50 pF
RS Stock No. 483-6803
Mfr. Part No.74LVT125PW,112
BrandNexperia
SGD0.661
Each (In a Pack of 10)
units
LVT Buffer, Line Driver - 4 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 14 -32mA 64mA 2.9 ns @ 3.3 V
RS Stock No. 858-0674
Mfr. Part No.LTC4311ISC6#TRMPBF
SGD7.895
Each (In a Pack of 2)
units
LTC - - - - - - - Surface Mount SC-70 6 - - -
RS Stock No. 145-6817
Mfr. Part No.SN74AHC1G126DBVR
SGD0.065
Each (On a Reel of 3000)
units
AHC - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 8.5 ns @ 50 pF
RS Stock No. 528-280
Mfr. Part No.SN74AHC1G125DBVR
SGD0.408
Each (In a Pack of 25)
units
AHC - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 11.5 ns @ 3.3 V
RS Stock No. 165-8573
Mfr. Part No.74LVC2G34GW,125
BrandNexperia
SGD0.10
Each (On a Reel of 3000)
units
LVC Buffer - 2 No Single Ended Single Ended Inverting Surface Mount SC-88 6 -32mA 32mA 10.8ns
RS Stock No. 155-9362
Mfr. Part No.LTC4311ISC6#TRMPBF
SGD4.867
Each (On a Reel of 500)
units
LTC - - - - - - - Surface Mount SC-70 6 - - -
RS Stock No. 171-3032
Mfr. Part No.TC7SZ34F
BrandToshiba
SGD0.109
Each (On a Reel of 3000)
units
- Non-Inverting - 1 - CMOS CMOS Non-Inverting Surface Mount SOT-25 5 -32mA 32mA 11 ns @ 15 pF
RS Stock No. 171-3379
Mfr. Part No.74HC126D
BrandToshiba
SGD0.147
Each (On a Reel of 2500)
units
74HC - - - - - - - Surface Mount SOIC 14 -7.8mA 7.8mA 195 ns @ 150 pF
RS Stock No. 122-1514
Mfr. Part No.74AHC125T14-13
SGD0.166
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
New
RS Stock No. 218-4628
Mfr. Part No.SN74LVC2G07DCKR
SGD0.623
Each (In a Pack of 25)
units
CMOS Buffer - 2 No - - - - SC-70 6 - - -
RS Stock No. 171-3056
Mfr. Part No.TC7WZ17FU
BrandToshiba
SGD0.164
Each (On a Reel of 3000)
units
- - - 1 Yes CMOS, Schmitt Trigger CMOS Non-Inverting Surface Mount SOT-505 8 -32mA 32mA 15.6 ns @ 15 pF
RS Stock No. 146-2096
Mfr. Part No.NC7SZ05P5X
SGD0.097
Each (On a Reel of 3000)
units
TinyLogic UHS Buffer, Driver - 1 No Single Ended Open Drain Inverting Surface Mount SC-70 5 - 32mA 13.4 ns @ 50 pF
RS Stock No. 806-2968
Mfr. Part No.MM74HC541MTC
SGD0.794
Each (In a Tube of 73)
units
CMOS Buffer - 8 No LS-TTL 3 State Non-Inverting Surface Mount TSSOP 20 7.8mA 7.8mA 190 ns @ 50 pF
RS Stock No. 806-3188
Mfr. Part No.MC14050BDR2G
SGD0.564
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. 171-3080
Mfr. Part No.TC7WZ07FU
BrandToshiba
SGD0.342
Each (In a Pack of 50)
units
- - - 1 - CMOS - Non-Inverting Surface Mount SOT-505 8 - 32mA 9.5 ns @ 50 pF