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. 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$1.895
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. 802-1305
Mfr. Part No.74LVX244MTC
HK$3.574
Each (In a Tube of 73)
units
74LVX Buffer, Line Driver - 8 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 20 -4mA 4mA 17 ns @ 50 pF
RS Stock No. 805-3096
Mfr. Part No.NL37WZ16USG
HK$3.14
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. 145-2981
Mfr. Part No.MC74LCX244DTG
HK$5.029
Each (In a Tube of 75)
units
LCX Buffer - 10 No TTL 3 State Non-Inverting Surface Mount TSSOP 20 -24mA 24mA 7.5 ns @ 50 pF
RS Stock No. 145-3695
Mfr. Part No.MC74VHC1G50DFT2G
HK$0.608
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. 145-3321
Mfr. Part No.M74VHC1GT50DFT1G
HK$0.386
Each (On a Reel of 3000)
units
VHC Buffer - 1 No Single Ended CMOS, Single Ended Non-Inverting Surface Mount SC-88A 5 -8mA 8mA 25.5 ns @ 50 pF
RS Stock No. 802-3281
Mfr. Part No.NC7SV17P5X
HK$2.835
Each (On a Tape of 50)
units
TinyLogic ULP Schmitt Trigger Buffer - 1 Yes Schmitt Trigger CMOS Non-Inverting Surface Mount SC-70 5 -24mA 24mA 4.4 ns @ 30 pF
RS Stock No. 163-0626
Mfr. Part No.MC74VHC1G07DFT1G
HK$0.558
Each (On a Reel of 3000)
units
VHC Buffer - 1 No Single Ended Open Drain Non-Inverting Surface Mount SC-88A 5 - 8mA 14.5 ns @ 50 pF (Enable Time)
RS Stock No. 791-6044
Mfr. Part No.M74VHC1GT125DF2G
HK$0.889
Each (In a Pack of 100)
units
LSTTL Buffer - 1 No Single Ended Single Ended Non-Inverting Surface Mount SC-70 5 - - 16ns
RS Stock No. 162-9137
Mfr. Part No.NL37WZ17USG
HK$1.071
Each (On a Reel of 3000)
units
LVCMOS, LVTTL Buffer - 3 No Single Ended Single Ended Non-Inverting Surface Mount US 8 -32mA 32mA 8.1 ns @ 15 pF
RS Stock No. 805-1536
Mfr. Part No.M74VHC1GT126DT1G
HK$1.239
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. 162-8913
Mfr. Part No.MC74VHCT125ADR2G
HK$1.123
Each (On a Reel of 2500)
units
HCT - - - - - - - Surface Mount SOIC 14 -25mA 25mA 16 ns @ 50 pF
RS Stock No. 186-7333
Mfr. Part No.NL17SZ07DFT2G
HK$0.29
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. 186-8396
Mfr. Part No.MC74LCX125DG
HK$2.884
Each (In a Pack of 25)
units
LCX Buffer - 4 - TTL 3 State Non-Inverting Surface Mount SOIC 14 -24mA 24mA 6.5 ns @ 50 pF
RS Stock No. 791-6264
Mfr. Part No.NL27WZ07DFT2G
HK$2.331
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. 806-6257
Mfr. Part No.NC7SV126P5X
HK$2.781
Each (In a Pack of 50)
units
TinyLogic ULP-A Buffer - 1 No Power Down High Impedance 3 State Non-Inverting Surface Mount SC-70 5 -24mA 24mA 4.6ns
RS Stock No. 802-1409
Mfr. Part No.74VHC541M
HK$5.356
Each (In a Tube of 36)
units
74VHC Buffer, Line Driver - 8 No TTL 3 State Non-Inverting Surface Mount SOIC 20 -8mA 8mA 12 ns @ 50 pF
RS Stock No. 806-3973
Mfr. Part No.MC74VHC1G07DFT1G
HK$0.802
Each (On a Tape of 100)
units
VHC Buffer - 1 No Single Ended Open Drain Non-Inverting Surface Mount SC-88A 5 - 8mA 14.5 ns @ 50 pF (Enable Time)
RS Stock No. 162-9372
Mfr. Part No.M74VHC1GT126DF1G
HK$0.396
Each (On a Reel of 3000)
units
LSTTL Buffer - 1 No Single Ended Single Ended Non-Inverting Surface Mount SC-70 5 - - 16ns