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. 662-8749
Mfr. Part No.SN74LVC1G17DBVT
TWD26.20
Each (In a Pack of 5)
units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 526-375
Mfr. Part No.SN74LVC1G17DBVR
TWD8.90
Each (In a Pack of 25)
units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 121-8339
Mfr. Part No.SN74LVC1G17DBVR
TWD1.60
Each (On a Reel of 3000)
units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 169-5698
Mfr. Part No.SN74LVC1G17DBVT
TWD17.70
Each (On a Reel of 250)
units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 5 ns @ 5 V
RS Stock No. 163-0540
Mfr. Part No.MC14503BDR2G
TWD8.50
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. 806-3251
Mfr. Part No.MC14503BDG
TWD18.80
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. 145-6812
Mfr. Part No.SN74LVC1G17DRLR
TWD3.30
Each (On a Reel of 4000)
units
LVC Buffer - 1 Yes Single Ended Single Ended Non-Inverting Surface Mount SOT-553 5 -32mA 32mA 11 ns @ 15 pF
RS Stock No. 812-2656
Mfr. Part No.P82B715D
TWD93.00
Each
units
P82B - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 809-5980
Mfr. Part No.SN74LVC1G17DRLR
TWD11.00
Each (In a Pack of 20)
units
LVC Buffer - 1 Yes Single Ended Single Ended Non-Inverting Surface Mount SOT-553 5 -32mA 32mA 11 ns @ 15 pF
RS Stock No. 662-8948
Mfr. Part No.SN74LVC2G17DCKR
TWD11.60
Each (In a Pack of 10)
units
LVC Schmitt Trigger Buffer - 2 Yes Single Ended - Non-Inverting Surface Mount SC-70 6 -32mA 32mA 5.4 ns @ 3.3 V
RS Stock No. 163-0528
Mfr. Part No.MC14050BDR2G
TWD4.90
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. 184-4254
Mfr. Part No.MC14050BDG
TWD13.30
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. 662-8266
Mfr. Part No.SN74HCT125DR
TWD12.70
Each (In a Pack of 10)
units
HCT Buffer, Line Driver Buffer & Line Driver - - Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -6mA 6mA 36 ns @ 4.5 V
RS Stock No. 806-3188
Mfr. Part No.MC14050BDR2G
TWD14.00
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. 816-8791
Mfr. Part No.74LVC1T45GW,125
BrandNexperia
TWD10.60
Each (In a Pack of 10)
units
LVC Transceiver - 1 - Single Ended 3 State Non-Inverting Surface Mount SC-88 6 -32mA 32mA 31.8ns
RS Stock No. 922-2864
Mfr. Part No.SN74LVC2G17DCKR
TWD3.00
Each (On a Reel of 3000)
units
LVC Schmitt Trigger Buffer - 2 Yes Single Ended - Non-Inverting Surface Mount SC-70 6 -32mA 32mA 5.4 ns @ 3.3 V
RS Stock No. 165-8503
Mfr. Part No.74LVC1T45GW,125
BrandNexperia
TWD3.80
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. 121-9367
Mfr. Part No.P82B715D
TWD79.30
Each (In a Tube of 75)
units
P82B - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 639-3869
Mfr. Part No.LMH6321MR/NOPB
TWD223.00
Each
units
CMOS, TTL - - 1 No - Push-Pull - Surface Mount PSOP 8 - - -