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. 813-9248
Mfr. Part No.74AUP1G07GW,125
BrandNexperia
HK$2.41
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. 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. 816-8823
Mfr. Part No.74LVC2G17GW,125
BrandNexperia
HK$1.844
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. 816-8842
Mfr. Part No.74LVC2T45DC,125
BrandNexperia
HK$4.069
Each (In a Pack of 10)
units
LVC Transceiver - 4 - Single Ended 3 State Inverting Surface Mount VSSOP 8 -32mA 32mA 37.8ns
RS Stock No. 816-4666
Mfr. Part No.74HCT1G126GW,125
BrandNexperia
HK$2.235
Each (On a Tape of 75)
units
HCT Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 5 -7.8mA 7.8mA 150 ns @ 50 pF
RS Stock No. 816-4676
Mfr. Part No.74HCT2G34GW,125
BrandNexperia
HK$2.328
Each (In a Pack of 40)
units
HCT Buffer - 2 No Single Ended Single Ended Non-Inverting Surface Mount SC-88 6 -5.2mA 5.2mA 29 ns @ 50 pF
RS Stock No. 816-8810
Mfr. Part No.74LVC2G125DP,125
BrandNexperia
HK$3.887
Each (In a Pack of 30)
units
LVC Buffer - 2 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 8 -32mA 32mA 11.4ns
RS Stock No. 165-8562
Mfr. Part No.74HCT2G34GW,125
BrandNexperia
HK$0.714
Each (On a Reel of 3000)
units
HCT Buffer - 2 No Single Ended Single Ended Non-Inverting Surface Mount SC-88 6 -5.2mA 5.2mA 29 ns @ 50 pF
RS Stock No. 165-8503
Mfr. Part No.74LVC1T45GW,125
BrandNexperia
HK$0.987
Each (On a Reel of 3000)
units
LVC Transceiver - 1 - Single Ended 3 State Non-Inverting Surface Mount SC-88 6 -32mA 32mA 31.8ns
RS Stock No. 165-8732
Mfr. Part No.74LVC2T45DC,125
BrandNexperia
HK$3.395
Each (On a Reel of 3000)
units
LVC Transceiver - 4 - Single Ended 3 State Inverting Surface Mount VSSOP 8 -32mA 32mA 37.8ns
RS Stock No. 136-4815
Mfr. Part No.HEF4049BT,653
BrandNexperia
HK$1.504
Each (On a Reel of 2500)
units
HEF Buffer - 1 - CMOS, DTL, TTL Single Ended Inverting Surface Mount SO 16 -3.6mA 24mA 70 (High to Low) ns, 100 (Low to High) ns @ 50 pF
RS Stock No. 816-8763
Mfr. Part No.74LVC1G17GV,125
BrandNexperia
HK$1.741
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. 178-6988
Mfr. Part No.74ABT125D,602
BrandNexperia
HK$4.068
Each (In a Tube of 57)
units
ABT Buffer, Line Driver - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -32mA 64mA 4.6 ns @ 5 V
RS Stock No. 103-5688
Mfr. Part No.74HCT7541D,112
BrandNexperia
HK$16.212
Each (In a Tube of 38)
units
HCT Buffer, Line Driver - 8 Yes Single Ended 3 State Non-Inverting Surface Mount SOIC 20 -6mA 6mA 32 ns @ 4.5 V
RS Stock No. 816-8753
Mfr. Part No.74LVC1G125GV,125
BrandNexperia
HK$0.74
Each (In a Pack of 100)
units
LVC Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount SC-74A 5 -32mA 32mA 10.5ns
RS Stock No. 483-7913
Mfr. Part No.HEF4050BT,652
BrandNexperia
HK$3.131
Each (In a Pack of 20)
units
4000 Buffer, Converter - 6 No Single Ended - Non-Inverting Surface Mount SOIC 16 - - 110 ns @ 5 V
RS Stock No. 169-3524
Mfr. Part No.74ABT125D,602
BrandNexperia
HK$5.11
Each
units
ABT Buffer, Line Driver - 4 No Single Ended 3 State Non-Inverting Surface Mount SOIC 14 -32mA 64mA 4.6 ns @ 5 V
RS Stock No. 816-8741
Mfr. Part No.74LVC1G07GV,125
BrandNexperia
HK$0.741
Each (In a Pack of 100)
units
LVC Buffer - 1 No Single Ended Open Drain Non-Inverting Surface Mount SC-74A 5 - 32mA 8.4ns
RS Stock No. 483-6803
Mfr. Part No.74LVT125PW,112
BrandNexperia
HK$4.132
Each (In a Pack of 10)
units
LVT Buffer, Line Driver - 4 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 14 -32mA 64mA 2.9 ns @ 3.3 V