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. 798-8941
Mfr. Part No.74AHCT125S14-13
TWD10.90
Each (On a Tape of 25)
units
AHCT Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount SOIC 14 -8mA 8mA 9.5 ns @ 50 pF
New
RS Stock No. 218-4608
Mfr. Part No.SN74LVC1G07DCKR
TWD9.30
Each (In a Pack of 50)
units
CMOS Buffer - 1 No - - - - SC-70 5 - - -
RS Stock No. 802-1156
Mfr. Part No.74AC541MTC
TWD19.30
Each (In a Tube of 73)
units
74AC Buffer, Driver - 8 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 20 -24mA 24mA 9 ns @ 50 pF
RS Stock No. 166-3030
Mfr. Part No.NC7WZ125K8X
TWD5.00
Each (On a Reel of 3000)
units
TinyLogic UHS Buffer - 2 No Single Ended 3 State Non-Inverting Surface Mount US 8 -32mA 32mA 13ns
New
RS Stock No. 218-4597
Mfr. Part No.SN74LV1T34DCKR
TWD4.40
Each (On a Reel of 3000)
units
CMOS Buffer - 1 No CMOS CMOS - - SC-70 5 - - -
RS Stock No. 802-1190
Mfr. Part No.74LCX07MTC
TWD14.40
Each (In a Tube of 94)
units
74LCX Buffer - 6 No Single Ended Open Drain Non-Inverting Surface Mount TSSOP 14 - 32mA 4.4 ns @ 50 pF
RS Stock No. 770-5301
Mfr. Part No.74LVC07AT14-13
TWD11.10
Each (On a Tape of 25)
units
74LVC Non-Inverting - - No CMOS Open Drain - Surface Mount TSSOP 14 -32mA 32mA 5 ns @ 2.7 V
RS Stock No. 162-8917
Mfr. Part No.MC74VHCT50ADR2G
TWD4.20
Each (On a Reel of 2500)
units
LSTTL Buffer - 6 No Single Ended Single Ended Non-Inverting Surface Mount SOIC 14 -8mA 8mA 10.5 ns @ 50 pF
RS Stock No. 165-8589
Mfr. Part No.74LVC1G125GV,125
BrandNexperia
TWD1.60
Each (On a Reel of 3000)
units
LVC Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount SC-74A 5 -32mA 32mA 10.5ns
RS Stock No. 169-7124
Mfr. Part No.74LVC07AT14-13
TWD3.20
Each (On a Reel of 2500)
units
74LVC Non-Inverting - - No CMOS Open Drain - Surface Mount TSSOP 14 -32mA 32mA 5 ns @ 2.7 V
RS Stock No. 171-3359
Mfr. Part No.74VHCT126AFT
BrandToshiba
TWD2.90
Each (On a Reel of 2500)
units
74VHCT - - - - - - - Surface Mount TSSOP 14 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 816-8763
Mfr. Part No.74LVC1G17GV,125
BrandNexperia
TWD6.70
Each (In a Pack of 75)
units
LVC Buffer - 1 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount SC-74A 5 -32mA 32mA 14ns
RS Stock No. 798-9017
Mfr. Part No.74HC125T14-13
TWD10.90
Each (In a Pack of 25)
units
HC Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount TSSOP 14 -4mA 5.2mA 150 ns @ 50 pF
RS Stock No. 662-9610
Mfr. Part No.CD4041UBM
TWD45.80
Each (In a Pack of 5)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Surface Mount SOIC 14 - - 120 ns @ 5 V
RS Stock No. 805-1532
Mfr. Part No.M74VHC1GT125DT1G
TWD4.40
Each (In a Pack of 100)
units
VHC Buffer - 1 No Single Ended CMOS, Single Ended Non-Inverting Surface Mount TSOP 5 -8mA 8mA 16 ns @ 50 pF
RS Stock No. 483-6960
Mfr. Part No.P82B96TD,112
BrandNXP
TWD120.00
Each
units
LVC - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 651-8074
Mfr. Part No.SN74AHC1G126DCKR
TWD6.80
Each (In a Pack of 50)
units
AHC - - - - - - - Surface Mount SC-70 5 -8mA 8mA 11.5 ns @ 3.3 V
RS Stock No. 145-5724
Mfr. Part No.SN74LVT125D
TWD31.50
Each (In a Tube of 50)
units
LVT Buffer, Line Driver - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -32mA 64mA 2.9 ns @ 3.3 V
RS Stock No. 186-8297
Mfr. Part No.MC74VHC1G50DTT1G
TWD10.00
Each (In a Pack of 25)
units
VHC Buffer - 1 - CMOS Bipolar Schottky TTL Non-Inverting Surface Mount TSOP 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 806-1202
Mfr. Part No.NC7WZ17L6X
TWD11.70
Each (In a Pack of 50)
units
TinyLogic UHS Buffer - 2 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount MicroPak 6 -32mA 32mA 15.8ns