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. 639-3869
Mfr. Part No.LMH6321MR/NOPB
TWD223.00
Each
units
CMOS, TTL - - 1 No - Push-Pull - Surface Mount PSOP 8 - - -
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. 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. 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. 121-8441
Mfr. Part No.SN74LVC1G125DBVR
TWD1.60
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount SOT-23 5 -32mA 32mA 4 ns @ 5 V
RS Stock No. 121-8976
Mfr. Part No.LMH6321MR/NOPB
TWD189.60
Each (In a Tube of 95)
units
CMOS, TTL - - 1 No - Push-Pull - Surface Mount PSOP 8 - - -
RS Stock No. 124-2358
Mfr. Part No.PCA9600DP,118
BrandNXP
TWD122.40
Each (On a Reel of 2500)
units
CMOS, TTL - - - - - - - Surface Mount TSSOP 8 - - -
RS Stock No. 662-7131
Mfr. Part No.CD74HC4050PWR
TWD14.20
Each (In a Pack of 10)
units
HC Buffer, Converter - 6 - Single Ended - Non-Inverting Surface Mount TSSOP 16 -5.2mA 5.2mA 14 ns @ 6 V, 17 ns @ 4.5 V, 85 ns @ 2 V
RS Stock No. 145-0387
Mfr. Part No.SN74LS365AN
TWD48.80
Each (In a Tube of 25)
units
LS Buffer, Line Driver - 6 No Single Ended 3 State Non-Inverting Through Hole PDIP 16 -2.6mA 24mA 22 ns @ 5 V
RS Stock No. 725-8764
Mfr. Part No.PCA9600DP,118
BrandNXP
TWD127.00
Each
units
CMOS, TTL - - - - - - - Surface Mount TSSOP 8 - - -
RS Stock No. 166-3308
Mfr. Part No.MM74HCT541WMX
TWD12.60
Each (On a Reel of 1000)
units
74HC - - - - - - - Surface Mount SOIC 20 7.2mA 7.2mA 45 ns @ 150 pF
RS Stock No. 526-729
Mfr. Part No.SN74LVC125APWR
TWD10.20
Each (In a Pack of 20)
units
LVC - - - - - - - Surface Mount TSSOP 14 -24mA 24mA 5.3 ns @ 2.7 V
RS Stock No. 662-8966
Mfr. Part No.SN74LVC2G34DCKR
TWD13.20
Each (In a Pack of 5)
units
LVC Buffer - 2 No Single Ended - Non-Inverting Surface Mount SC-70 6 -32mA 32mA 4.1 ns @ 3.3 V
RS Stock No. 443-198
Mfr. Part No.SN74HC367N
TWD22.00
Each
units
HC Buffer, Line Driver - 6 No Single Ended 3 State Non-Inverting Through Hole PDIP 16 -7.8mA 7.8mA 120 ns @ 2 V
RS Stock No. 309-228
Mfr. Part No.SN74LS365AN
TWD54.00
Each
units
LS Buffer, Line Driver - 6 No Single Ended 3 State Non-Inverting Through Hole PDIP 16 -2.6mA 24mA 22 ns @ 5 V
RS Stock No. 816-8772
Mfr. Part No.74LVC1G17GW,125
BrandNexperia
TWD5.40
Each (In a Pack of 75)
units
LVC Buffer - 1 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount TSSOP 5 -32mA 32mA 14ns
RS Stock No. 103-8140
Mfr. Part No.74LVC1G17GW,125
BrandNexperia
TWD1.00
Each (On a Reel of 3000)
units
LVC Buffer - 1 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount TSSOP 5 -32mA 32mA 14ns
RS Stock No. 922-2805
Mfr. Part No.CD74HC4050PWR
TWD5.50
Each (On a Reel of 2000)
units
HC Buffer, Converter - 6 - Single Ended - Non-Inverting Surface Mount TSSOP 16 -5.2mA 5.2mA 14 ns @ 6 V, 17 ns @ 4.5 V, 85 ns @ 2 V
RS Stock No. 124-2357
Mfr. Part No.PCA9600D,112
BrandNXP
TWD81.10
Each (In a Tube of 100)
units
CMOS, TTL - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 144-9901
Mfr. Part No.SN74HC367N
TWD19.00
Each (In a Tube of 25)
units
HC Buffer, Line Driver - 6 No Single Ended 3 State Non-Inverting Through Hole PDIP 16 -7.8mA 7.8mA 120 ns @ 2 V