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. 145-0136
Mfr. Part No.CD4041UBE
SGD1.911
Each (In a Tube of 25)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Through Hole PDIP 14 - - 120 ns @ 5 V
RS Stock No. 145-3983
Mfr. Part No.NL27WZ07DTT1G
SGD0.133
Each (On a Reel of 3000)
units
LCX Buffer - 2 No Single Ended Open Drain - Surface Mount TSOP 6 - 32mA 12 ns @ 15 pF
RS Stock No. 851-6840
Mfr. Part No.LTC4300A-3IMS8#PBF
SGD7.835
Each (In a Pack of 2)
units
LTC - - - - - - - Surface Mount MSOP 8 - - ±75ns
RS Stock No. 662-9616
Mfr. Part No.CD4041UBE
SGD2.10
Each (In a Pack of 5)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Through Hole PDIP 14 - - 120 ns @ 5 V
RS Stock No. 103-5687
Mfr. Part No.74HC7541D,112
BrandNexperia
SGD1.803
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. 162-8905
Mfr. Part No.M74VHC1GT126DT1G
SGD0.097
Each (On a Reel of 3000)
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. 805-1481
Mfr. Part No.M74VHC1G125DFT2G
SGD0.162
Each (On a Tape of 100)
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. 805-1867
Mfr. Part No.NL27WZ07DTT1G
SGD0.454
Each (On a Tape of 50)
units
LCX Buffer - 2 No Single Ended Open Drain - Surface Mount TSOP 6 - 32mA 12 ns @ 15 pF
RS Stock No. 805-1536
Mfr. Part No.M74VHC1GT126DT1G
SGD0.155
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. 809-6046
Mfr. Part No.SN74LVC2G126DCTR
SGD0.814
Each (In a Pack of 20)
units
LVC - - - - - - - Surface Mount SM 8 -32mA 32mA 10.8 ns@ 30 pF
RS Stock No. 145-3320
Mfr. Part No.M74VHC1G125DFT2G
SGD0.065
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. 802-1604
Mfr. Part No.NL17SZ125DFT2G
SGD0.145
Each (On a Tape of 200)
units
NL Buffer - 1 No Single Ended 3 State Non-Inverting Surface Mount SC-88A 5 -32mA 32mA 10.5 ns @ 15 pF
RS Stock No. 662-9610
Mfr. Part No.CD4041UBM
SGD1.94
Each (In a Pack of 5)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Surface Mount SOIC 14 - - 120 ns @ 5 V
RS Stock No. 483-6689
Mfr. Part No.74HC7541D,112
BrandNexperia
SGD2.29
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. 145-0418
Mfr. Part No.CD4041UBM
SGD1.385
Each (In a Tube of 50)
units
4000 Buffer - 4 No Single Ended - Inverting, Non-Inverting Surface Mount SOIC 14 - - 120 ns @ 5 V
RS Stock No. 725-8751
Mfr. Part No.PCA9600D,112
BrandNXP
SGD5.09
Each
units
CMOS, TTL - - - - - - - Surface Mount SOIC 8 - - -
RS Stock No. 162-6704
Mfr. Part No.SN74LVC1G126DBVR
SGD0.075
Each (On a Reel of 3000)
units
74LVC Buffer - 1 No CMOS, TTL 3 State Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 4.2 ns @ 5 V
RS Stock No. 802-1305
Mfr. Part No.74LVX244MTC
SGD0.793
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. 796-8240
Mfr. Part No.SN74LVC1G126DBVR
SGD0.303
Each (In a Pack of 25)
units
74LVC Buffer - 1 No CMOS, TTL 3 State Non-Inverting Surface Mount SOT-23 5 -32mA 32mA 4.2 ns @ 5 V
RS Stock No. 162-6726
Mfr. Part No.SN74LVC2G126DCTR
SGD0.415
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount SM 8 -32mA 32mA 10.8 ns @ 30 pF