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$2.457
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$2.055
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. 152-6475
Mfr. Part No.74LVC1G17GW-Q100,1
BrandNexperia
HK$0.478
Each (On a Reel of 3000)
units
74LVC Schmitt Trigger Buffer - 1 Yes Schmitt Trigger CMOS - Surface Mount TSSOP 5 -32mA -32mA -
RS Stock No. 136-4820
Mfr. Part No.HEF4049BT,653
BrandNexperia
HK$2.027
Each (In a Pack of 100)
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. 153-2947
Mfr. Part No.74HCT3G07DP-Q100H
BrandNexperia
HK$4.80
Each (In a Pack of 25)
units
74HCT Buffer - 3 - TTL Open Drain Non-Inverting Surface Mount TSSOP 8 - 4mA 32 ns @ 50 pF
RS Stock No. 816-8753
Mfr. Part No.74LVC1G125GV,125
BrandNexperia
HK$0.917
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. 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. 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. 153-2836
Mfr. Part No.74LVC2G07GW-Q100H
BrandNexperia
HK$0.839
Each (On a Reel of 3000)
units
74LVC Buffer - 2 Yes Schmitt Trigger Open Drain Non-Inverting Surface Mount SC-88 6 - 32mA 8.4 ns @ 50 pF
RS Stock No. 165-8589
Mfr. Part No.74LVC1G125GV,125
BrandNexperia
HK$0.414
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. 153-2933
Mfr. Part No.74LVC2G07GW-Q100H
BrandNexperia
HK$2.048
Each (In a Pack of 25)
units
74LVC Buffer - 2 Yes Schmitt Trigger Open Drain Non-Inverting Surface Mount SC-88 6 - 32mA 8.4 ns @ 50 pF
RS Stock No. 816-8772
Mfr. Part No.74LVC1G17GW,125
BrandNexperia
HK$1.397
Each (In a Pack of 75)
units
LVC Buffer - 1 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount TSSOP 5 -32mA 32mA 14ns
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. 165-8630
Mfr. Part No.74LVC2G125DP,125
BrandNexperia
HK$1.753
Each (On a Reel of 3000)
units
LVC Buffer - 2 No Single Ended 3 State Non-Inverting Surface Mount TSSOP 8 -32mA 32mA 11.4ns
RS Stock No. 816-8832
Mfr. Part No.74LVC2G34GW,125
BrandNexperia
HK$1.932
Each (In a Pack of 40)
units
LVC Buffer - 2 No Single Ended Single Ended Inverting Surface Mount SC-88 6 -32mA 32mA 10.8ns
RS Stock No. 483-6689
Mfr. Part No.74HC7541D,112
BrandNexperia
HK$13.574
Each (In a Pack of 5)
units
HC Buffer, Line Driver - 8 Yes Single Ended 3 State Non-Inverting Surface Mount SOIC 20 -7.8mA 7.8mA 120 ns @ 2 V
RS Stock No. 103-5687
Mfr. Part No.74HC7541D,112
BrandNexperia
HK$11.592
Each (In a Tube of 38)
units
HC Buffer, Line Driver - 8 Yes Single Ended 3 State Non-Inverting Surface Mount SOIC 20 -7.8mA 7.8mA 120 ns @ 2 V
RS Stock No. 146-0913
Mfr. Part No.74LVC1G17GV,125
BrandNexperia
HK$0.335
Each (On a Reel of 3000)
units
LVC Buffer - 1 Yes Schmitt Trigger Single Ended Non-Inverting Surface Mount SC-74A 5 -32mA 32mA 14ns