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庫存編號 162-7492
製造零件編號SN74LVC2G08DCTR
HK$1.638
個 (在毎卷:3000)
單位
AND Surface Mount 2 2 No SSOP 8 LVC - 5.5 V -32mA 3.8 ns @ 5 V, 4.7 ns @ 3.3 V 1.65 V 32mA
RS庫存編號 662-8887
製造零件編號SN74LVC2G00DCUT
HK$6.398
/個 (每包:5個)
單位
NAND Surface Mount 2 2 No VSSOP 8 LVC - 5.5 V -32mA 3.3 ns @ 5 V, 4.3 ns @ 3.3 V 1.65 V 32mA
RS庫存編號 165-8729
製造零件編號74LVC2G08DC,125
BrandNexperia
HK$1.792
個 (在毎卷:3000)
單位
AND Surface Mount 2 2 No VSSOP 8 LVC TTL 5.5 V -32mA 6.7 ns @ 50 pF 1.65 V 32mA
RS庫存編號 922-2909
製造零件編號CD4093BM
HK$3.411
毎管:50 個
單位
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 18 V -4.2mA 130 ns @ 15 V, 180 ns @ 10 V, 380 ns @ 5 V 3 V 4.2mA
RS庫存編號 921-0815
製造零件編號ULN2003V12T16-13
HK$3.126
/個 (每包:30個)
單位
- Surface Mount - - - TSSOP 16 - CMOS 5 V - 140ns 3.3 V 140mA
RS庫存編號 662-6649
製造零件編號74LVC1G3208DBVR
HK$2.00
/個 (每包:10個)
單位
Multifunction Surface Mount 1 3 No SOT-23 6 LVC - 5.5 V -32mA 4 ns @ 5 V, 5.9 ns @ 3.3 V 1.65 V 32mA
RS庫存編號 145-0164
製造零件編號SN74AHC08D
HK$2.699
毎管:50 個
單位
AND Surface Mount 4 2 No SOIC 14 AHC - 5.5 V -8mA 7.9 ns @ 5 V, 12.3 ns @ 3.3 V 2 V 8mA
RS庫存編號 662-7096
製造零件編號CD74HC30PWR
HK$2.451
/個 (每包:10個)
單位
NAND Surface Mount 1 8 No TSSOP 14 HC - 6 V -5.2mA 22 ns @ 6 V, 26 ns @ 4.5 V, 130 ns @ 2 V 2 V 5.2mA
RS庫存編號 103-2926
製造零件編號MC14093BDG
HK$2.565
毎管:55 個
單位
NAND Surface Mount 4 2 Yes SOIC 14 4000 Schmitt Trigger 18 V -4.2mA 80 ns @ 15 V, 100 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS庫存編號 662-9571
製造零件編號CD4023BM
HK$3.183
/個 (每包:10個)
單位
NAND Surface Mount 3 3 No SOIC 14 4000 - 18 V -4.2mA 90 ns @ 15 V, 120 ns @ 10 V, 250 ns @ 5 V 3 V 4.2mA
RS庫存編號 145-1237
製造零件編號SN74AHCT02D
HK$1.642
毎管:50 個
單位
NOR Surface Mount 4 2 No SOIC 14 AHCT - 5.5 V -8mA 7.5 ns @ 5 V 4.5 V 8mA
RS庫存編號 759-6696
製造零件編號74AC86SC
HK$3.791
/個 (每包:55個)
單位
XOR Surface Mount 4 2 No SOIC 14 AC - 6 V -75mA 12.5ns 2 V 75mA
RS庫存編號 540-8134
製造零件編號TC74HC32AF(F)
BrandToshiba
HK$2.46
/個 (每包:5個)
單位
OR 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庫存編號 662-9521
製造零件編號CD4011UBM
HK$2.803
/個 (每包:10個)
單位
NAND Surface Mount 4 2 No SOIC 14 4000 - 18 V -4.2mA 50 ns @ 15 V, 60 ns @ 10 V, 120 ns @ 5 V 3 V 4.2mA
RS庫存編號 103-8153
製造零件編號HEF4011BT,652
BrandNexperia
HK$2.99
毎管:57 個
單位
NAND Surface Mount 4 2 No SOIC 14 4000 - 15 V -3.6mA 35 ns @ 15 V, 45 ns @ 10 V, 110 ns @ 5 V 3 V 3.6mA
RS庫存編號 816-8820
製造零件編號74LVC2G32DC,125
BrandNexperia
HK$3.059
/個 (每包:10個)
單位
OR Surface Mount 2 2 No VSSOP 8 LVC TTL 5.5 V -32mA 6 ns @ 50 pF 1.65 V 32mA
RS庫存編號 663-1215
製造零件編號SN74AHCT02D
HK$1.342
/個 (每包:10個)
單位
NOR Surface Mount 4 2 No SOIC 14 AHCT - 5.5 V -8mA 7.5 ns @ 5 V 4.5 V 8mA
RS庫存編號 527-069
製造零件編號CD4070BE
HK$3.698
毎管:25 個
單位
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
RS庫存編號 166-1278
製造零件編號74LVC132AD,112
BrandNexperia
HK$4.254
毎管:57 個
單位
NAND Surface Mount 4 2 Yes SOIC 14 LVC Schmitt Trigger 3.6 V -24mA - 1.2 V 24mA
RS庫存編號 806-2602
製造零件編號MC100EP08DG
HK$66.23
單位
XOR/XNOR Surface Mount 1 2 No SOIC 8 EP ECL 5.5 V - 320ps -3 V 0.5µA