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. 796-8265
Mfr. Part No.SN74LVC2G125DCUR
HK$3.854
Each (In a Pack of 10)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns@ 5 V
RS Stock No. 162-6725
Mfr. Part No.SN74LVC2G125DCUR
HK$1.271
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount US 8 - - 4.2 ns @ 5 V
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. 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. 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. 796-8180
Mfr. Part No.SN74AHCT1G125DBVR
HK$2.101
Each (In a Pack of 25)
units
HCT - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 8.5 ns @ 50 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. 162-6651
Mfr. Part No.SN74AHCT1G125DBVR
HK$0.527
Each (On a Reel of 3000)
units
HCT - - - - - - - Surface Mount SOT-23 5 -8mA 8mA 8.5 ns @ 50 pF
RS Stock No. 528-264
Mfr. Part No.SN74LVC1G125DBVR
HK$2.352
Each (In a Pack of 25)
units
LVC - - - - - - - Surface Mount SOT-23 5 -32mA 32mA 4 ns @ 5 V
RS Stock No. 155-9362
Mfr. Part No.LTC4311ISC6#TRMPBF
HK$34.222
Each (On a Reel of 500)
units
LTC - - - - - - - Surface Mount SC-70 6 - - -
RS Stock No. 121-8441
Mfr. Part No.SN74LVC1G125DBVR
HK$0.618
Each (On a Reel of 3000)
units
LVC - - - - - - - Surface Mount SOT-23 5 -32mA 32mA 4 ns @ 5 V
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. 858-0674
Mfr. Part No.LTC4311ISC6#TRMPBF
HK$43.125
Each (In a Pack of 2)
units
LTC - - - - - - - Surface Mount SC-70 6 - - -
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. 171-3290
Mfr. Part No.74LCX126FT
BrandToshiba
HK$0.783
Each (On a Reel of 2500)
units
74LCX - - - - - - - Surface Mount TSSOP 14 -24mA 24mA 22 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. 809-6046
Mfr. Part No.SN74LVC2G126DCTR
HK$5.471
Each (In a Pack of 20)
units
LVC - - - - - - - Surface Mount SM 8 -32mA 32mA 10.8 ns@ 30 pF
RS Stock No. 796-8243
Mfr. Part No.SN74LVC1G126DCKR
HK$2.152
Each (In a Pack of 25)
units
74LVC Buffer - 1 No CMOS, TTL 3 State Non-Inverting Surface Mount SC-70 5 -32mA 32mA 4.2 ns @ 5 V