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. 796-8265
Mfr. Part No.SN74LVC2G125DCUR
HK$3.854
Each (In a Pack of 10)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns@ 5 V
RS Stock No. 162-6725
Mfr. Part No.SN74LVC2G125DCUR
HK$1.271
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns @ 5 V
RS Stock No. 162-6651
Mfr. Part No.SN74AHCT1G125DBVR
HK$0.527
Each (On a Reel of 3000)
units
HCT - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 8.5 ns @ 50 pF
RS Stock No. 528-264
Mfr. Part No.SN74LVC1G125DBVR
HK$2.352
Each (In a Pack of 25)
units
LVC - - - - - - - Surface Mount SOT-23 5 -32mA 32mA 4 ns @ 5 V
RS Stock No. 121-8441
Mfr. Part No.SN74LVC1G125DBVR
HK$0.618
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount SOT-23 5 -32mA 32mA 4 ns @ 5 V
RS Stock No. 796-8180
Mfr. Part No.SN74AHCT1G125DBVR
HK$2.101
Each (In a Pack of 25)
units
HCT - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 8.5 ns @ 50 pF
RS Stock No. 144-9901
Mfr. Part No.SN74HC367N
HK$5.03
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
RS Stock No. 922-2861
Mfr. Part No.SN74LVC2G17DBVT
HK$6.867
Each (On a Reel of 250)
units
LVC Schmitt Trigger Buffer - 2 Yes Single Ended - Non-Inverting Surface Mount SOT-23 6 -32mA 32mA 5.4 ns @ 3.3 V
RS Stock No. 812-2650
Mfr. Part No.P82B715P
HK$26.24
Each
units
P82B - - - - - - - Through Hole PDIP 8 - - -
RS Stock No. 527-760
Mfr. Part No.CD74HC4050M
HK$4.279
Each (In a Tube of 40)
units
HC Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 -5.2mA 5.2mA 85 ns @ 2 V
RS Stock No. 162-6669
Mfr. Part No.SN74AUP1T17DCKR
HK$0.855
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. 169-5703
Mfr. Part No.SN74LVC2G17DCKT
HK$4.80
Each (On a Reel of 250)
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. 197-7527
Mfr. Part No.SN74LVC2G17DCKR
HK$3.087
Each (In a Pack of 25)
units
LVC Buffer - 2 Yes Schmitt Trigger - - - SC-70 6 - - -
RS Stock No. 922-2864
Mfr. Part No.SN74LVC2G17DCKR
HK$0.793
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. 162-6704
Mfr. Part No.SN74LVC1G126DBVR
HK$0.447
Each (On a Reel of 3000)
units
74LVC Buffer - 1 No CMOS, TTL 3 State Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 4.2 ns @ 5 V
RS Stock No. 145-7420
Mfr. Part No.SN74LVC2G34DBVT
HK$5.425
Each (On a Reel of 250)
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. 528-280
Mfr. Part No.SN74AHC1G125DBVR
HK$1.944
Each (In a Pack of 25)
units
AHC - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 11.5 ns @ 3.3 V
RS Stock No. 809-9604
Mfr. Part No.SN74AUP1T17DCKR
HK$2.349
Each (On a Tape of 20)
units
AUP Buffer - 1 Yes Single Ended CMOS Non-Inverting Surface Mount SC-70 5 -4mA 4mA 10 ns @ 30 pF
RS Stock No. 145-7376
Mfr. Part No.SN74LVC2G34DCKR
HK$0.882
Each (On a Reel of 3000)
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. 651-8074
Mfr. Part No.SN74AHC1G126DCKR
HK$1.669
Each (In a Pack of 50)
units
AHC - - - - - - - Surface Mount SC-70 5 -8mA 8mA 11.5 ns @ 3.3 V