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. 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. 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. 813-9248
Mfr. Part No.74AUP1G07GW,125
BrandNexperia
HK$2.457
Each (In a Pack of 40)
units
AUP - - - No Single Ended Open Drain - Surface Mount TSSOP 5 - 4mA 20.7 ns @ 30 pF
RS Stock No. 165-9929
Mfr. Part No.74AUP1G07GW,125
BrandNexperia
HK$0.852
Each (On a Reel of 3000)
units
AUP - - - No Single Ended Open Drain - Surface Mount TSSOP 5 - 4mA 20.7 ns @ 30 pF
RS Stock No. 796-8180
Mfr. Part No.SN74AHCT1G125DBVR
HK$2.656
Each (In a Pack of 25)
units
HCT - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 8.5 ns @ 50 pF
RS Stock No. 805-3009
Mfr. Part No.NLU2G16MUTCG
HK$4.652
Each (In a Pack of 25)
units
NLU Buffer - 2 No Single Ended CMOS Non-Inverting Surface Mount UDFN 6 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 162-9172
Mfr. Part No.NLU2G16MUTCG
HK$2.174
Each (On a Reel of 3000)
units
NLU Buffer - 2 No Single Ended CMOS Non-Inverting Surface Mount UDFN 6 -8mA 8mA 14.5 ns @ 50 pF
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. 816-8823
Mfr. Part No.74LVC2G17GW,125
BrandNexperia
HK$2.384
Each (In a Pack of 40)
units
LVC Buffer - 2 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount SC-88 6 -32mA 32mA 13.1ns
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. 155-9362
Mfr. Part No.LTC4311ISC6#TRMPBF
HK$34.222
Each (On a Reel of 500)
units
LTC - - - - - - - Surface Mount SC-70 6 - - -
RS Stock No. 858-0674
Mfr. Part No.LTC4311ISC6#TRMPBF
HK$43.125
Each (In a Pack of 2)
units
LTC - - - - - - - Surface Mount SC-70 6 - - -
RS Stock No. 165-8572
Mfr. Part No.74LVC2G17GW,125
BrandNexperia
HK$0.675
Each (On a Reel of 3000)
units
LVC Buffer - 2 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount SC-88 6 -32mA 32mA 13.1ns
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. 806-3848
Mfr. Part No.MC74LVX541DWG
HK$6.478
Each (In a Pack of 38)
units
LVX - - - - - - - Surface Mount SOIC 20 -4mA 4mA 12 ns @ 50 pF
RS Stock No. 121-8976
Mfr. Part No.LMH6321MR/NOPB
HK$50.221
Each (In a Tube of 95)
units
CMOS, TTL - - 1 No - Push-Pull - Surface Mount PSOP 8 - - -
RS Stock No. 171-3022
Mfr. Part No.TC7SZ07FE,LJ(CT
BrandToshiba
HK$0.539
Each (On a Reel of 4000)
units
- - - 1 - - - Non-Inverting Surface Mount SOT-25 5 -32mA 32mA 12 ns @ 50 pF
RS Stock No. 145-5276
Mfr. Part No.MC74VHC1G07DTT1G
HK$0.558
Each (On a Reel of 3000)
units
VHC Buffer - 1 No Single Ended Open Drain Non-Inverting Surface Mount TSOP 5 - 8mA 14.5 ns @ 50 pF (Enable Time)
RS Stock No. 145-0387
Mfr. Part No.SN74LS365AN
HK$12.936
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. 166-3308
Mfr. Part No.MM74HCT541WMX
HK$3.329
Each (On a Reel of 1000)
units
74HC - - - - - - - Surface Mount SOIC 20 7.2mA 7.2mA 45 ns @ 150 pF