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. 531-6647
Mfr. Part No.TC4049BP(F)
BrandToshiba
SGD0.509
Each (In a Pack of 10)
units
4000 Buffer, Converter - 6 - Single Ended - Inverting Through Hole PDIP 16 -4.8mA 28mA 50 ns @ 15 V, 65 ns @ 10 V, 120 ns @ 5 V
RS Stock No. 171-3519
Mfr. Part No.74LCX540FT
BrandToshiba
SGD0.704
Each (In a Pack of 20)
units
74LCX - - 8 - CMOS - Inverting Surface Mount TSSOP 20 -24mA 24mA 25 ns @ 50 pF
RS Stock No. 171-3030
Mfr. Part No.TC7SZ17FE
BrandToshiba
SGD0.096
Each (On a Reel of 4000)
units
- - - 1 Yes CMOS, Schmitt Trigger CMOS Non-Inverting Surface Mount SOT-553 5 -24mA 32mA 17.5 ns @ 15 pF
RS Stock No. 171-3110
Mfr. Part No.TC7WH125FK
BrandToshiba
SGD0.29
Each (In a Pack of 50)
units
- - - - - - - - Surface Mount SOT-765 8 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 171-3124
Mfr. Part No.TC7SZ34FU
BrandToshiba
SGD0.221
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. 171-3052
Mfr. Part No.TC7WZ125FU
BrandToshiba
SGD0.164
Each (On a Reel of 3000)
units
- - - - - - - - Surface Mount SOT-505 8 -32mA 32mA 11.5 ns @ 15 pF
RS Stock No. 171-3002
Mfr. Part No.74HC541D
BrandToshiba
SGD0.464
Each (On a Reel of 2000)
units
74HC - - - - - - - Surface Mount SOIC 20 -7.8mA 7.8mA 165 ns @ 150 pF
RS Stock No. 171-3304
Mfr. Part No.74LCX541FT
BrandToshiba
SGD0.456
Each (On a Reel of 2500)
units
74LCX - - 8 - CMOS - Non-Inverting Surface Mount TSSOP 20 -8mA 24mA 25 ns @ 50 pF
RS Stock No. 171-3023
Mfr. Part No.TC7SZ07FE
BrandToshiba
SGD0.113
Each (On a Reel of 4000)
units
- - - 1 - - - Non-Inverting Surface Mount SOT-553 5 -32mA 32mA 12 ns @ 50 pF
RS Stock No. 171-3288
Mfr. Part No.74LCX07FT
BrandToshiba
SGD0.147
Each (On a Reel of 2500)
units
74LCX - - 6 - - CMOS, Open Drain Non-Inverting Surface Mount TSSOP 14 -24mA 32mA -
RS Stock No. 171-3465
Mfr. Part No.74LCX07FT
BrandToshiba
SGD0.448
Each (In a Pack of 50)
units
74LCX - - 6 - - CMOS, Open Drain Non-Inverting Surface Mount TSSOP 14 -24mA 32mA -
RS Stock No. 171-3051
Mfr. Part No.TC7WZ125FK
BrandToshiba
SGD0.135
Each (On a Reel of 3000)
units
- - - - - - - - Surface Mount SOT-765 8 -32mA 32mA 13 ns @ 15 pF
RS Stock No. 171-3523
Mfr. Part No.74VHCT541AFT
BrandToshiba
SGD0.56
Each (In a Pack of 25)
units
74VHCT - - - - - - - Surface Mount TSSOP 20 -8mA 8mA 10 ns @ 50 pF
RS Stock No. 171-3009
Mfr. Part No.TC7SET126F
BrandToshiba
SGD0.109
Each (On a Reel of 3000)
units
- - - - - - - - Surface Mount SOT-25 5 -8mA 8mA 13 ns @ 50 pF
RS Stock No. 171-3294
Mfr. Part No.74LCX244FT
BrandToshiba
SGD0.456
Each (On a Reel of 2500)
units
74LCX - - - - - - - Surface Mount TSSOP 20 -24mA 24mA 25 ns @ 50 pF
RS Stock No. 171-3112
Mfr. Part No.TC7SET126F
BrandToshiba
SGD0.266
Each (In a Pack of 50)
units
- - - - - - - - Surface Mount SOT-25 5 -8mA 8mA 13 ns @ 50 pF
RS Stock No. 171-3080
Mfr. Part No.TC7WZ07FU
BrandToshiba
SGD0.342
Each (In a Pack of 50)
units
- - - 1 - CMOS - Non-Inverting Surface Mount SOT-505 8 - 32mA 9.5 ns @ 50 pF
RS Stock No. 171-3024
Mfr. Part No.TC7SZ125FE
BrandToshiba
SGD0.113
Each (On a Reel of 4000)
units
- - - - - - - - Surface Mount SOT-553 5 -32mA 32mA 13 ns @ 15 pF
RS Stock No. 171-3499
Mfr. Part No.74LCX126FT
BrandToshiba
SGD0.448
Each (In a Pack of 50)
units
74LCX - - - - - - - Surface Mount TSSOP 14 -24mA 24mA 22 ns @ 50 pF
RS Stock No. 171-3387
Mfr. Part No.74HC244D
BrandToshiba
SGD0.467
Each (On a Reel of 2000)
units
74HC - - - - - - - Surface Mount SOIC 20 -7.8mA 7.8mA 165 ns @ 150 pF