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. 518-8953
Mfr. Part No.MC14050BDG
€0.35
Each
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 140 ns @ 5 V
RS Stock No. 917-5541
Mfr. Part No.NC7NZ17K8X
€0.088
Each (In a Pack of 50)
units
TinyLogic UHC Buffer - 3 Yes Schmitt Trigger CMOS Non-Inverting Surface Mount JEDEC MO-187 8 -32mA 32mA 13.1 ns @ 15 pF
RS Stock No. 806-4015
Mfr. Part No.MC74VHC1G50DFT2G
€0.024
Each (On a Tape of 100)
units
VHC Buffer - 1 No CMOS Bipolar Schottky TTL, CMOS Non-Inverting Surface Mount SC-88A 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 163-0528
Mfr. Part No.MC14050BDR2G
€0.108
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
€0.30
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. 184-4254
Mfr. Part No.MC14050BDG
€0.285
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. 145-3695
Mfr. Part No.MC74VHC1G50DFT2G
€0.028
Each (On a Reel of 3000)
units
VHC Buffer - 1 No CMOS Bipolar Schottky TTL, CMOS Non-Inverting Surface Mount SC-88A 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 162-9136
Mfr. Part No.NL37WZ16USG
€0.115
Each (On a Reel of 3000)
units
NL Buffer - 3 No TTL LVCMOS Non-Inverting Surface Mount US 8 -32mA 32mA 5.1 ns @ 50 pF
RS Stock No. 805-3096
Mfr. Part No.NL37WZ16USG
€0.28
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. 162-9127
Mfr. Part No.NL27WZ125USG
€0.075
Each (On a Reel of 3000)
units
LCX Buffer - 2 No Single Ended 3 State Non-Inverting Surface Mount US 8 -32mA 32mA 13 ns @ 15 pF
RS Stock No. 186-8665
Mfr. Part No.NLX2G17AMX1TCG
€0.257
Each (In a Pack of 25)
units
- Buffer - 2 Yes Schmitt Trigger Schmitt Trigger Non-Inverting Surface Mount ULLGA 6 -32mA 32mA 7.5 ns @ 50 pF
RS Stock No. 791-6264
Mfr. Part No.NL27WZ07DFT2G
€0.206
Each (On a Tape of 50)
units
LVTTL Buffer - 2 No Single Ended Open Drain Non-Inverting Surface Mount SC-88 6 - 32mA 12ns
RS Stock No. 162-8917
Mfr. Part No.MC74VHCT50ADR2G
€0.092
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. 903-4324
Mfr. Part No.MM74HCT541WMX
€0.575
Each (In a Pack of 25)
units
74HC - - - - - - - Surface Mount SOIC 20 7.2mA 7.2mA 45 ns@ 150 pF
RS Stock No. 162-9130
Mfr. Part No.NL27WZ16DTT1G
€0.073
Each (On a Reel of 3000)
units
LCX Buffer - 2 No Single Ended CMOS, Single Ended - Surface Mount TSOP 6 -32mA 32mA 10.2 ns @ 15 pF
RS Stock No. 184-4289
Mfr. Part No.MC74VHCT50ADTR2G
€0.098
Each (On a Reel of 2500)
units
VHCT Non-Inverting - 1 - LS-TTL CMOS Non-Inverting Surface Mount TSSOP 14 - - 13ns
RS Stock No. 806-1393
Mfr. Part No.MC74HC125ADR2G
€0.066
Each (In a Pack of 50)
units
LSTTL Buffer - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 7.8mA 7.8mA 180 ns @ 50 pF
RS Stock No. 806-3841
Mfr. Part No.MC74LVX50DG
€0.317
Each (In a Pack of 55)
units
LVX Buffer - 6 No CMOS CMOS Non-Inverting Surface Mount SOIC 14 -4mA 4mA 16 ns @ 50 pF
RS Stock No. 145-3320
Mfr. Part No.M74VHC1G125DFT2G
€0.02
Each (On a Reel of 3000)
units
VHC Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount SC-88A 5 -8mA 8mA 16 ns @ 50 pF
RS Stock No. 806-3848
Mfr. Part No.MC74LVX541DWG
€0.576
Each (In a Pack of 38)
units
LVX - - - - - - - Surface Mount SOIC 20 -4mA 4mA 12 ns @ 50 pF