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. 806-1208
Mfr. Part No.NC7WZ16L6X
TWD11.70
Each (In a Pack of 25)
units
TinyLogic UHS Buffer - 2 No Single Ended Single Ended Non-Inverting Surface Mount MicroPak 6 -32mA 32mA 10.6ns
RS Stock No. 166-3196
Mfr. Part No.74LCX126MX
TWD8.30
Each (On a Reel of 2500)
units
74LCX Buffer - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -24mA 24mA 6 ns @ 50 pF
RS Stock No. 162-9372
Mfr. Part No.M74VHC1GT126DF1G
TWD1.50
Each (On a Reel of 3000)
units
LSTTL Buffer - 1 No Single Ended Single Ended Non-Inverting Surface Mount SC-70 5 - - 16ns
New
RS Stock No. 218-4597
Mfr. Part No.SN74LV1T34DCKR
TWD4.00
Each (On a Reel of 3000)
units
CMOS Buffer - 1 No CMOS CMOS - - SC-70 5 - - -
RS Stock No. 171-3122
Mfr. Part No.TC7WH17FK
BrandToshiba
TWD7.70
Each (In a Pack of 50)
units
- - - 1 Yes CMOS, Schmitt Trigger CMOS Non-Inverting Surface Mount SOT-765 8 -8mA 8mA 17 ns @ 15 pF
RS Stock No. 146-0432
Mfr. Part No.74LVT126PW,112
BrandNexperia
TWD11.70
Each (In a Tube of 96)
units
LVT Buffer - 4 No TTL 3 State Non-Inverting Surface Mount TSSOP 14 -32mA 32mA 6.1 ns @ 50 pF
RS Stock No. 806-1397
Mfr. Part No.MC74HC125ADTG
TWD13.80
Each (In a Pack of 25)
units
LSTTL Buffer - 4 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 14 7.8mA 7.8mA 180 ns @ 50 pF
RS Stock No. 805-1813
Mfr. Part No.NL27WZ125USG
TWD10.50
Each (On a Tape of 50)
units
LCX Buffer - 2 No Single Ended 3 State Non-Inverting Surface Mount US 8 -32mA 32mA 13 ns @ 15 pF
RS Stock No. 652-5016
Mfr. Part No.SN74AHC1G125DCKR
TWD8.10
Each (In a Pack of 10)
units
AHC - - - - - - - Surface Mount SC-70 5 -8mA 8mA 11.5 ns @ 3.3 V
RS Stock No. 171-3175
Mfr. Part No.TC7SH126F
BrandToshiba
TWD1.70
Each (In a Pack of 100)
units
- - - - - - - - Surface Mount SOT-25 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 171-3023
Mfr. Part No.TC7SZ07FE
BrandToshiba
TWD2.50
Each (On a Reel of 4000)
units
- - - 1 - - - Non-Inverting Surface Mount SOT-553 5 -32mA 32mA 12 ns @ 50 pF
RS Stock No. 171-3508
Mfr. Part No.74HC125D
BrandToshiba
TWD11.10
Each (In a Pack of 50)
units
74HC - - - - - - - Surface Mount SOIC 14 -7.8mA 7.8mA 195 ns @ 150 pF
RS Stock No. 805-1867
Mfr. Part No.NL27WZ07DTT1G
TWD10.80
Each (On a Tape of 50)
units
LCX Buffer - 2 No Single Ended Open Drain - Surface Mount TSOP 6 - 32mA 12 ns @ 15 pF
RS Stock No. 124-2311
Mfr. Part No.HEF4050BT,652
BrandNexperia
TWD11.80
Each (In a Tube of 50)
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 110 ns @ 5 V
RS Stock No. 171-3168
Mfr. Part No.TC7SET125F
BrandToshiba
TWD6.00
Each (In a Pack of 50)
units
- - - - - - - - Surface Mount SOT-25 5 -8mA 8mA 13 ns @ 50 pF
RS Stock No. 169-7224
Mfr. Part No.74AHCT125S14-13
TWD4.00
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. 527-631
Mfr. Part No.SN74ABT126D
TWD26.50
Each (In a Pack of 25)
units
ABT - - - - - - - Surface Mount SOIC 14 -32mA 64mA 5.1 ns @ 5 V
RS Stock No. 802-1171
Mfr. Part No.74ACT541SC
TWD28.40
Each (In a Tube of 36)
units
74ACT Buffer, Driver - 8 No Single Ended 3 State Non-Inverting Surface Mount SOIC 20 -24mA 24mA 9 ns @ 50 pF
RS Stock No. 146-0912
Mfr. Part No.74LVC1G07GV,125
BrandNexperia
TWD1.30
Each (On a Reel of 3000)
units
LVC Buffer - 1 No Single Ended Open Drain Non-Inverting Surface Mount SC-74A 5 - 32mA 8.4ns
RS Stock No. 806-2964
Mfr. Part No.MM74HC540WM
TWD26.80
Each (In a Tube of 36)
units
CMOS Buffer - 8 No LS-TTL 3 State Inverting Surface Mount SOIC 20 7.8mA 7.8mA 190 ns @ 50 pF