# 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

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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
 New RS Stock No. 923-6801 Mfr. Part No.CD4011UBE BrandTexas Instruments Compare \$0.748 Each (In a Tube of 25) units NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 5 V, 50 ns @ 15 V, 60 ns @ 10 V 3 V 4.2mA New RS Stock No. 709-2968 Mfr. Part No.CD4011UBE BrandTexas Instruments Compare \$0.746 Each (In a Pack of 10) units NAND Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 5 V, 50 ns @ 15 V, 60 ns @ 10 V 3 V 4.2mA New RS Stock No. 709-2371 Mfr. Part No.CD4082BE BrandTexas Instruments Compare \$0.75 Each (In a Pack of 20) units AND Through Hole 2 4 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 10 V, 250 ns @ 5 V, 90 ns @ 15 V 3 V 4.2mA New RS Stock No. 145-0008 Mfr. Part No.CD4082BE BrandTexas Instruments Compare \$0.678 Each (In a Tube of 25) units AND Through Hole 2 4 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 10 V, 250 ns @ 5 V, 90 ns @ 15 V 3 V 4.2mA New RS Stock No. 527-132 Mfr. Part No.CD4002BE BrandTexas Instruments Compare \$0.678 Each (In a Tube of 25) units NOR Through Hole 2 4 No PDIP 14 4000 - 18 V -4.2mA 120 ns @ 10 V, 250 ns @ 5 V, 90 ns @ 15 V 3 V 4.2mA New RS Stock No. 805-6402 Mfr. Part No.MC74VHCT00ADR2G BrandON Semiconductor Compare \$0.567 Each (On a Tape of 50) units NAND Surface Mount 4 2 No SOIC 14 HCT TTL 5.5 V -8mA 17.5ns 3 V 8mA New RS Stock No. 355-9167 Mfr. Part No.HEF4093BT,652 BrandNexperia Compare \$0.88 Each units NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 15 V -4.2mA 185 ns @ 5 V, 60 ns @ 15 V, 80 ns @ 10 V 3 V 4.2mA New RS Stock No. 796-7941 Mfr. Part No.CD4072BE BrandTexas Instruments Compare \$0.678 Each (In a Pack of 25) units OR Through Hole 2 4 No PDIP 14 4000 CMOS 18 V -4.2mA 250 ns @ 50 pF 3 V 4.2mA New RS Stock No. 368-5884 Mfr. Part No.SN74LS00N BrandTexas Instruments Compare \$0.928 Each (In a Tube of 25) units NAND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 15 ns @ 5 V 4.75 V 8mA New RS Stock No. 124-2313 Mfr. Part No.HEF4093BT,652 BrandNexperia Compare \$0.684 Each (In a Tube of 57) units NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 15 V -4.2mA 185 ns @ 5 V, 60 ns @ 15 V, 80 ns @ 10 V 3 V 4.2mA New RS Stock No. 145-4219 Mfr. Part No.MC74VHCT00ADR2G BrandON Semiconductor Compare \$0.19 Each (On a Reel of 2500) units NAND Surface Mount 4 2 No SOIC 14 HCT TTL 5.5 V -8mA 17.5ns 3 V 8mA New RS Stock No. 307-496 Mfr. Part No.SN74LS02N BrandTexas Instruments Compare \$1.10 Each units NOR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 15 ns @ 5 V 4.75 V 8mA New RS Stock No. 307-604 Mfr. Part No.SN74LS86AN BrandTexas Instruments Compare \$1.01 Each units XOR Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 30 ns @ 5 V 4.75 V 8mA New RS Stock No. 145-0039 Mfr. Part No.CD4072BE BrandTexas Instruments Compare \$0.678 Each (In a Tube of 25) units OR Through Hole 2 4 No PDIP 14 4000 CMOS 18 V -4.2mA 250 ns @ 50 pF 3 V 4.2mA New RS Stock No. 170-7964 Mfr. Part No.HEF4093BT,653 BrandNexperia Compare \$0.174 Each (On a Reel of 2500) units NAND Surface Mount 4 2 Yes SO 14 HEF Schmitt Trigger 15 V -4.2mA 185 ns @ 50 pF 3 V 4.2mA New RS Stock No. 761-3482 Mfr. Part No.74AC08SCX BrandON Semiconductor Compare \$0.939 Each (On a Tape of 25) units AND Surface Mount 4 2 No SOIC 14 AC - 6 V -24mA 10ns 2 V 24mA New RS Stock No. 923-2335 Mfr. Part No.SN74LS08N BrandTexas Instruments Compare \$0.951 Each (In a Tube of 25) units AND Through Hole 4 2 No PDIP 14 LS - 5.25 V -0.4mA 20 ns @ 5 V 4.75 V 8mA New RS Stock No. 663-1906 Mfr. Part No.SN74HC11NE4 BrandTexas Instruments Compare \$0.525 Each (In a Pack of 10) units AND Through Hole 3 3 No PDIP 14 HC - 6 V -5.2mA 100 ns @ 2 V, 17 ns @ 6 V, 20 ns @ 4.5 V 2 V 5.2mA New RS Stock No. 527-441 Mfr. Part No.CD4030BE BrandTexas Instruments Compare \$0.678 Each (In a Tube of 25) units XOR Through Hole 4 2 No PDIP 14 4000 - 18 V -4.2mA 100 ns @ 15 V, 130 ns @ 10 V, 280 ns @ 5 V 3 V 4.2mA New RS Stock No. 732-0859 Mfr. Part No.CD74AC32M96 BrandTexas Instruments Compare \$1.01 Each (In a Pack of 5) units OR Surface Mount 4 2 No SOIC 14 AC CMOS 5.5 V -24mA 119ns 1.5 V 24mA
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