Logic Gates

Logic gates are physical components in a circuit that control the flow of a signal by implementing a boolean function, processing a signal to binary information. Logic gates are foundational in logic circuits, or in any electronic circuit process that involves digital to analogue signal conversion, or the flow of digital information.

The RS components range offers semiconductor logic gates from leading brands, with input/output configurations to suit the demands of your digital circuit.

Types of Logic Gate

Logic gates have distinct logic functions. The most common of these are known as basic gates. These include:

• AND Gates. This gate has multiple inputs that are processed to a single signal depending on the
positive combination of high signals in the inputs. It will only produce a high signal if both inputs register as high. (e.g two ones will result in a one, otherwise it will have an output of zero.)

• OR Gates. Like the AND gate, an OR gate has multiple inputs and a single output. In this case, it does not require a positive combination of one signals, but will implement logical produce a high signal if one or all of the inputs are high. (e.g a one and a zero, or two ones, may produce a high signal, but two zeros will produce zeros.)

• NOT Gates. Also known as inverters, the NOT gates will process the signal as the opposite of its value (eg. a one will invert as a zero, and a zero will invert as a 1.)

There are also combined function logic gates that modify typical functions with an inversion.

• NAND Gate. Unlike an AND gate, NAND will process two high signals as a zero and all other combinations as a one.

• NOR Gate. Unlike an OR gate, this will produce a one if the inputs register a zero signal in any combination, rather than a high signal.

• Buffer Gate. A buffer logic gate behaves in the opposite manner of a NOT gate, in that it passes a signal unchanged from input to output.

There are also logic gates referred to as Exclusive Gates.

• XNOR (EX-NOR) Gate. These gates process a high signal if all input signals are true, e.g: if there are two one signals or two zero signals.

• XOR Gate. Unlike an XNOR, XOR performs exclusive dis-junction, which means it will only output a true signal if exactly one of the inputs are true.

Applications

As CPUs employ binary logic, logic gates are essentially the building blocks of computers. As such they can be found in many kinds of digital circuits. Though their essential functions remain unchanged, their implementations are many.

• Encoders
• Decoders
• Multiplexers
• Demultiplexers
• Full adders
• Half adders

...
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Description Price Logic Function Mounting Type Number of Elements Number of Inputs per Gate Schmitt Trigger Input Package Type Pin Count Logic Family Input Type Maximum Operating Supply Voltage Maximum High Level Output Current Maximum Propagation Delay Time @ Maximum CL Minimum Operating Supply Voltage Maximum Low Level Output Current
RS Stock No. 756-3031
Mfr. Part No.TC74VCX00FK(EL)
BrandToshiba
$0.746
Each (In a Pack of 5)
units
NAND Surface Mount 4 2 No VSSOP 14 VCX CMOS 3.6 V +24mA 7.4ns 1.2 V -24mA
RS Stock No. 756-2996
Mfr. Part No.TC74LCX00F(K,F)
BrandToshiba
$0.392
Each (In a Pack of 10)
units
NAND Surface Mount 4 2 No SOP 14 LCX CMOS 3.6 V +50mA 6ns 2 V -50mA
RS Stock No. 644-0151
Mfr. Part No.TC74AC08FT
BrandToshiba
$1.66
Each (In a Pack of 5)
units
AND Surface Mount 4 2 No TSSOP 14 AC - 5.5 V -24mA 7 ns @ 5 V, 9.8 ns @ 3.3 V 2 V 24mA
RS Stock No. 756-3306
Mfr. Part No.TC7SZ08FE(TE85L,F)
BrandToshiba
$0.236
Each (In a Pack of 10)
units
AND Surface Mount 1 2 No SON 5 - CMOS 5.5 V +24mA 4.9ns 1.65 V -24mA
RS Stock No. 465-2093
Mfr. Part No.TC74VHC00FT
BrandToshiba
$0.502
Each (In a Pack of 5)
units
NAND Surface Mount 4 2 No TSSOP 14 VHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS Stock No. 539-9204
Mfr. Part No.TC74HC00AP(F)
BrandToshiba
$0.838
Each (In a Pack of 5)
units
NAND Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS Stock No. 540-7563
Mfr. Part No.TC74HC00AF(F)
BrandToshiba
$0.264
Each (In a Pack of 5)
units
NAND Surface Mount 4 2 No SOP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS Stock No. 539-9282
Mfr. Part No.TC74HC08AP(F)
BrandToshiba
$0.862
Each (In a Pack of 5)
units
AND Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS Stock No. 539-9377
Mfr. Part No.TC74HC32AP(F)
BrandToshiba
$0.532
Each (In a Pack of 5)
units
OR Through Hole 4 2 No PDIP 14 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA
RS Stock No. 541-9673
Mfr. Part No.TC4081BP(F)
BrandToshiba
$1.392
Each (In a Pack of 5)
units
AND Through Hole 4 2 No PDIP 14 4000 - 18 V -4mA 80 ns @ 15 V, 100 ns @ 10 V, 200 ns @ 5 V 3 V 4mA
RS Stock No. 539-9349
Mfr. Part No.TC74HC21AP(F)
BrandToshiba
$0.378
Each (In a Pack of 5)
units
AND Through Hole 2 4 No PDIP 14 HC - 6 V -5.2mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 5.2mA
RS Stock No. 756-3056
Mfr. Part No.TC74VHC00F(K,F)
BrandToshiba
$0.366
Each (In a Pack of 10)
units
NAND Surface Mount 4 2 No SOP 14 VHC CMOS 5.5 V +25mA 13ns 2 V -25mA
RS Stock No. 531-6748
Mfr. Part No.TC4093BF(F)
BrandToshiba
$1.199
Each (In a Pack of 10)
units
NAND Surface Mount 4 2 Yes SOP 14 4000 Schmitt Trigger 18 V -4mA 80 ns @ 15 V, 120 ns @ 10 V, 260 ns @ 5 V 3 V 4mA
RS Stock No. 540-6914
Mfr. Part No.TC7SH32FU(F)
BrandToshiba
$0.316
Each (In a Pack of 5)
units
OR Surface Mount 1 2 No SSOP 5 VHC - 5.5 V -8mA 7.5 ns @ 5 V, 11.4 ns @ 3.3 V 2 V 8mA
RS Stock No. 539-9490
Mfr. Part No.TC74HC132AP(F)
BrandToshiba
$1.082
Each (In a Pack of 5)
units
NAND Through Hole 4 2 Yes PDIP 14 HC Schmitt Trigger 6 V -5.2mA 19 ns @ 6 V, 22 ns @ 4.5 V, 110 ns @ 2 V 2 V 5.2mA
RS Stock No. 539-8425
Mfr. Part No.TC74AC02P(F)
BrandToshiba
$0.682
Each (In a Pack of 5)
units
NOR Through Hole 4 2 No PDIP 14 AC - 5.5 V -24mA 7 ns @ 5 V, 9.8 ns @ 3.3 V 2 V 24mA
RS Stock No. 756-3062
Mfr. Part No.TC74VHC08F(K,F)
BrandToshiba
$0.423
Each (In a Pack of 10)
units
AND Surface Mount 4 2 No SOP 14 VHC CMOS 5.5 V +25mA 14ns 2 V -25mA
RS Stock No. 541-9544
Mfr. Part No.TC4011BP(F)
BrandToshiba
$1.232
Each (In a Pack of 5)
units
NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4mA 80 ns @ 15 V, 100 ns @ 10 V, 200 ns @ 5 V 3 V 4mA
RS Stock No. 896-6740
Mfr. Part No.TC7SH00FU,LJ(CT
BrandToshiba
$0.144
Each (In a Pack of 100)
units
NAND Surface Mount 1 2 No SSOP 5 VHC CMOS 5.5 V -8mA 13 ns @ 50 pF 2 V 8mA
RS Stock No. 540-7119
Mfr. Part No.TC7W00FK(F)
BrandToshiba
$0.428
Each (In a Pack of 5)
units
NAND Surface Mount 2 2 No SSOP 8 HC - 6 V -5.2mA 13 ns @ 6 V, 15 ns @ 4.5 V, 75 ns @ 2 V 2 V 5.2mA