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. 770-5314
Mfr. Part No.74LVC125AT14-13
HK$2.73
Each (On a Tape of 25)
units
LVC Non-Inverting - - - CMOS 3 State - Surface Mount TSSOP 14 -24mA 24mA 7 ns @ 2.7 V
RS Stock No. 798-8948
Mfr. Part No.74AHCT126S14-13
HK$2.832
Each (In a Pack of 25)
units
AHCT Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Inverting Surface Mount SOIC 14 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 827-0301
Mfr. Part No.74LV07AS14-13
HK$2.52
Each (In a Pack of 50)
units
74LV Buffer - 6 Yes Schmitt Trigger Open Drain - Surface Mount SOIC 14 - 12mA 8.5 ns @ 50 pF
RS Stock No. 822-8666
Mfr. Part No.74AHC1G125SE-7
HK$0.728
Each (In a Pack of 200)
units
74AHC Buffer, Bus driver - 1 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount SOT-353 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 166-0160
Mfr. Part No.74LVC14AT14-13
HK$0.854
Each (On a Reel of 2500)
units
LVC NOT - - - Schmitt Trigger Push-Pull - Surface Mount TSSOP 14 -24mA 24mA 7 ns @ 2.7 V
RS Stock No. 169-7244
Mfr. Part No.74HCT126S14-13
HK$1.061
Each (On a Reel of 2500)
units
HCT Buffer - 4 No TTL 3 State Inverting Surface Mount SOIC 14 -4mA 4mA 38 ns @ 50 pF
RS Stock No. 169-7225
Mfr. Part No.74AHCT126S14-13
HK$0.952
Each (On a Reel of 2500)
units
AHCT Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Inverting Surface Mount SOIC 14 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 122-1514
Mfr. Part No.74AHC125T14-13
HK$0.987
Each (On a Reel of 2500)
units
AHC Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount TSSOP 14 -4mA 8mA 14.5 ns @ 50 pF
RS Stock No. 121-9604
Mfr. Part No.74LVC1G17SE-7
HK$0.351
Each (On a Reel of 3000)
units
74LVC Buffer - 1 Yes Schmitt Trigger Push-Pull Non-Inverting Surface Mount SOT-353 5 -32mA 32mA 14 ns @ 50 pF
RS Stock No. 169-7124
Mfr. Part No.74LVC07AT14-13
HK$0.837
Each (On a Reel of 2500)
units
74LVC Non-Inverting - - No CMOS Open Drain - Surface Mount TSSOP 14 -32mA 32mA 5 ns @ 2.7 V
RS Stock No. 798-9008
Mfr. Part No.74HC125S14-13
HK$3.158
Each (In a Pack of 25)
units
HC Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount SOIC 14 -4mA 5.2mA 150 ns @ 50 pF
RS Stock No. 146-0450
Mfr. Part No.74AHCT1G125SE-7
HK$0.333
Each (On a Reel of 3000)
units
74AHCT Buffer, Driver - 1 Yes CMOS, Schmitt Trigger 3 State Non-Inverting Surface Mount SOT-353 5 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 146-0933
Mfr. Part No.74AHC1G126W5-7
HK$0.397
Each (On a Reel of 3000)
units
74AHC Buffer, Driver - 1 Yes CMOS, Schmitt Trigger 3 State Non-Inverting Surface Mount SOT-25 5 -8mA 8mA 14.5 ns @ 50 pF
RS Stock No. 921-0269
Mfr. Part No.74AHCT1G126SE-7
HK$0.617
Each (In a Pack of 100)
units
74AHCT Buffer, Driver - 1 Yes CMOS, Schmitt Trigger 3 State Non-Inverting Surface Mount SOT-353 5 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 169-7224
Mfr. Part No.74AHCT125S14-13
HK$1.04
Each (On a Reel of 2500)
units
AHCT Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount SOIC 14 -8mA 8mA 9.5 ns @ 50 pF
RS Stock No. 822-8708
Mfr. Part No.74LVC1G17W5-7
HK$0.755
Each (In a Pack of 100)
units
74LVC Buffer - 1 Yes Schmitt Trigger Push-Pull Non-Inverting Surface Mount SOT-25 5 -32mA 32mA 14 ns @ 50 pF
RS Stock No. 169-7246
Mfr. Part No.74HCT125T14-13
HK$1.061
Each (On a Reel of 2500)
units
HCT Buffer - 4 No TTL 3 State Non-Inverting Surface Mount TSSOP 14 -4mA 4mA 38 ns @ 50 pF
RS Stock No. 921-0304
Mfr. Part No.74LVC2G17DW-7
HK$2.52
Each (In a Pack of 50)
units
74LVC Buffer, Driver - - Yes - Push-Pull Non-Inverting Surface Mount SOT-363 6 -32mA 32mA 13.1 ns @ 50 pF
RS Stock No. 798-8881
Mfr. Part No.74AHC125T14-13
HK$2.832
Each (In a Pack of 25)
units
AHC Schmitt Trigger Buffer - 4 Yes Schmitt Trigger 3 State Non-Inverting Surface Mount TSSOP 14 -4mA 8mA 14.5 ns @ 50 pF
RS Stock No. 827-0263
Mfr. Part No.74AUP2G3404FW3-7
HK$2.184
Each (In a Pack of 50)
units
CMOS Buffer, Inverter - 2 Yes Schmitt Trigger Push-Pull Inverting, Non-Inverting Surface Mount X2-DFN0910 6 -4mA 4mA 7.2 ns @ 30 pF