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
New
RS Stock No. 218-4595
Mfr. Part No.SN74LV1T34DBVR
TWD4.00
Each (On a Reel of 3000)
units
CMOS Buffer - 1 No CMOS CMOS - - SOT-23 5 - - -
RS Stock No. 124-2311
Mfr. Part No.HEF4050BT,652
BrandNexperia
TWD11.80
Each (In a Tube of 50)
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 110 ns @ 5 V
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
RS Stock No. 166-3773
Mfr. Part No.NC7SP125P5X
TWD4.30
Each (On a Reel of 3000)
units
TinyLogic ULP Buffer - 1 No Power Down High Impedance 3 State Inverting Surface Mount SC-70 5 -2.6mA 2.6mA 51.1ns
RS Stock No. 169-7225
Mfr. Part No.74AHCT126S14-13
TWD3.70
Each (On a Reel of 2500)
units
AHCT Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Inverting Surface Mount SOIC 14 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 812-2669
Mfr. Part No.P82B96DGKR
TWD110.00
Each
units
P82B96 - - - - - - - Surface Mount VSSOP 8 - 3mA 270ns
RS Stock No. 798-8948
Mfr. Part No.74AHCT126S14-13
TWD10.90
Each (In a Pack of 25)
units
AHCT Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Inverting Surface Mount SOIC 14 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 186-7333
Mfr. Part No.NL17SZ07DFT2G
TWD1.30
Each (On a Reel of 3000)
units
- Buffer - 1 - Single Open Drain Non-Inverting Surface Mount SC 5 - 32mA 9.5 ns @ 50 pF
RS Stock No. 171-3118
Mfr. Part No.TC7SET17F
BrandToshiba
TWD6.20
Each (In a Pack of 50)
units
- - - 1 Yes CMOS, Schmitt Trigger CMOS, TTL Non-Inverting Surface Mount SOT-25 5 -8mA 8mA 13.5 ns @ 50 pF
RS Stock No. 171-3124
Mfr. Part No.TC7SZ34FU
BrandToshiba
TWD1.50
Each (In a Pack of 100)
units
- Non-Inverting - 1 - CMOS CMOS Non-Inverting Surface Mount SOT-353 5 -32mA 32mA 11 ns @ 15 pF
RS Stock No. 163-2265
Mfr. Part No.NL17SZ126DFT2G
TWD1.60
Each (On a Reel of 3000)
units
NL Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount SC-88A 5 -32mA 32mA 12.5 ns @ 15 pF
RS Stock No. 528-280
Mfr. Part No.SN74AHC1G125DBVR
TWD8.90
Each (In a Pack of 25)
units
AHC - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 11.5 ns @ 3.3 V
RS Stock No. 891-2778
Mfr. Part No.TC74HCT244AP(F)
BrandToshiba
TWD51.00
Each (In a Pack of 5)
units
74HC - - - - - - - Through Hole PDIP 20 -6mA 6mA 38 ns@ 150 pF
RS Stock No. 162-9857
Mfr. Part No.SN74AUP1G125DCKT
TWD12.80
Each (On a Reel of 250)
units
74AUP Buffer - 1 No CMOS 3 State Inverting, Non-Inverting Surface Mount SC-70 5 -4mA 4mA 21.4 ns @ 30 pF
RS Stock No. 805-3096
Mfr. Part No.NL37WZ16USG
TWD11.90
Each (In a Pack of 50)
units
NL Buffer - 3 No TTL LVCMOS Non-Inverting Surface Mount US 8 -32mA 32mA 5.1 ns @ 50 pF
RS Stock No. 896-6747
Mfr. Part No.TC7SH125F,LJ(CT
BrandToshiba
TWD8.10
Each (In a Pack of 50)
units
VHC - - - - - - - Surface Mount SSOP 5 -8mA 8mA 13 ns@ 50 pF
RS Stock No. 162-8900
Mfr. Part No.M74VHC1G125DTT1G
TWD2.00
Each (On a Reel of 3000)
units
VHC Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount TSOP 5 -8mA 8mA 16 ns @ 50 pF
RS Stock No. 171-3132
Mfr. Part No.TC7SET34F
BrandToshiba
TWD6.20
Each (In a Pack of 50)
units
- Non-Inverting - 1 - CMOS CMOS, TTL Non-Inverting Surface Mount SOT-25 5 -8mA 8mA 13.5 ns @ 50 pF
RS Stock No. 146-0566
Mfr. Part No.74AHC1G125SE-7
TWD1.50
Each (On a Reel of 3000)
units
74AHC Buffer, Bus driver - 1 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount SOT-353 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 662-8742
Mfr. Part No.SN74LVC1G17DCKT
TWD26.20
Each (In a Pack of 5)
units
LVC Schmitt Trigger Buffer - 1 Yes Single Ended - Non-Inverting Surface Mount SC-70 5 -32mA 32mA 5 ns @ 5 V