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. 796-8243
Mfr. Part No.SN74LVC1G126DCKR
SGD0.372
Each (In a Pack of 25)
units
74LVC Buffer - 1 No CMOS, TTL 3 State Non-Inverting Surface Mount SC-70 5 -32mA 32mA 4.2 ns @ 5 V
RS Stock No. 725-8751
Mfr. Part No.PCA9600D,112
BrandNXP
SGD5.09
Each
units
CMOS, TTL - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 483-6689
Mfr. Part No.74HC7541D,112
BrandNexperia
SGD2.29
Each (In a Pack of 5)
units
HC Buffer, Line Driver - 8 Yes Single Ended 3 State Non-Inverting Surface Mount SOIC 20 -7.8mA 7.8mA 120 ns @ 2 V
RS Stock No. 145-3983
Mfr. Part No.NL27WZ07DTT1G
SGD0.133
Each (On a Reel of 3000)
units
LCX Buffer - 2 No Single Ended Open Drain - Surface Mount TSOP 6 - 32mA 12 ns @ 15 pF
RS Stock No. 171-3034
Mfr. Part No.TC7SZ34FU
BrandToshiba
SGD0.093
Each (On a Reel of 3000)
units
- Non-Inverting - 1 - CMOS CMOS Non-Inverting Surface Mount SOT-353 5 -32mA 32mA 11 ns @ 15 pF
RS Stock No. 921-0275
Mfr. Part No.74LVC07AS14-13
SGD0.426
Each (In a Pack of 50)
units
74LVC Buffer - 6 No CMOS Open Drain Non-Inverting Surface Mount SOIC 14 - 32mA 7.6 ns @ 50 pF
RS Stock No. 806-4015
Mfr. Part No.MC74VHC1G50DFT2G
SGD0.256
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. 171-3033
Mfr. Part No.TC7SZ34FE
BrandToshiba
SGD0.104
Each (On a Reel of 4000)
units
- Non-Inverting - 1 - CMOS CMOS Non-Inverting Surface Mount SOT-553 5 -32mA 32mA 11 ns @ 15 pF
RS Stock No. 166-3196
Mfr. Part No.74LCX126MX
SGD0.295
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. 165-8503
Mfr. Part No.74LVC1T45GW,125
BrandNexperia
SGD0.181
Each (On a Reel of 3000)
units
LVC Transceiver - 1 - Single Ended 3 State Non-Inverting Surface Mount SC-88 6 -32mA 32mA 31.8ns
RS Stock No. 820-9163
Mfr. Part No.ADATE305BSVZ
SGD82.10
Each
units
ADATE305 Buffer - 2 No Differential 3 State Non-Inverting Surface Mount TQFP 100 12mA 12mA 7.3ns
RS Stock No. 197-7467
Mfr. Part No.P82B96D
SGD6.485
Each (In a Pack of 2)
units
LVC - - - - - - - - SOIC 8 - 30mA -
RS Stock No. 171-3407
Mfr. Part No.74VHCV541FT
BrandToshiba
SGD0.541
Each (In a Pack of 25)
units
- - - - - - - - Surface Mount TSSOP 20 -16mA 16mA 20.5 ns @ 50 pF
RS Stock No. 914-3049
Mfr. Part No.SN74AUP1G125DCKT
SGD0.957
Each (In a Pack of 10)
units
74AUP Buffer - 1 No CMOS 3 State Inverting, Non-Inverting Surface Mount SC-70 5 -4mA 4mA 21.4 ns @ 30 pF
RS Stock No. 162-6669
Mfr. Part No.SN74AUP1T17DCKR
SGD0.136
Each (On a Reel of 3000)
units
AUP Buffer - 1 Yes Single Ended CMOS Non-Inverting Surface Mount SC-70 5 -4mA 4mA 10 ns @ 30 pF
RS Stock No. 146-0432
Mfr. Part No.74LVT126PW,112
BrandNexperia
SGD0.491
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. 809-6062
Mfr. Part No.SN74LVC2G34DBVT
SGD1.407
Each (On a Tape of 10)
units
LVC Buffer - 2 No Single Ended Single Ended Non-Inverting Surface Mount SOT-23 6 -32mA 32mA 9.6 ns @ 30 pF
RS Stock No. 166-0160
Mfr. Part No.74LVC14AT14-13
SGD0.141
Each (On a Reel of 2500)
units
LVC NOT - - - Schmitt Trigger Push-Pull - Surface Mount TSSOP 14 -24mA 24mA 7 ns @ 2.7 V
RS Stock No. 662-9638
Mfr. Part No.CD4049UBD
SGD0.924
Each (In a Pack of 5)
units
4000 Buffer, Converter - 6 - Single Ended - Inverting Surface Mount SOIC 16 -5.2mA 26mA 50 ns @ 15 V, 65 ns @ 10 V, 120 ns @ 5 V
RS Stock No. 171-3100
Mfr. Part No.74HC541D
BrandToshiba
SGD1.065
Each (In a Pack of 10)
units
74HC - - - - - - - Surface Mount SOIC 20 -7.8mA 7.8mA 165 ns @ 150 pF