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 540-0512
製造零件編號TC7S32F(F)
BrandToshiba
HK$3.424
/個 (每包:5個)
單位
OR Surface Mount 1 2 No SSOP 5 HC - 6 V -2.6mA 17 ns @ 6 V, 20 ns @ 4.5 V, 100 ns @ 2 V 2 V 2.6mA
RS庫存編號 540-8134
製造零件編號TC74HC32AF(F)
BrandToshiba
HK$3.40
/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 540-7282
製造零件編號TC7W32FK(F)
BrandToshiba
HK$5.488
/個 (每包:5個)
單位
OR 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
RS庫存編號 171-3148
製造零件編號TC7SZ86FE
BrandToshiba
HK$0.881
/個 (每包:100個)
單位
XOR Surface Mount 1 2 - SOT-553 5 - CMOS 5.5 V -32mA 13.5 ns @ 15 pF 1.65 V 32mA
RS庫存編號 171-3563
製造零件編號74VHC27FT
BrandToshiba
HK$1.328
/個 (每包:50個)
單位
NOR Surface Mount 3 3 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 15.5 ns @ 50 pF 2 V 8mA
RS庫存編號 171-3299
製造零件編號74LCX32FT
BrandToshiba
HK$0.896
個 (在毎卷:2500)
單位
OR Surface Mount 4 2 - TSSOP 14 74LCX CMOS 3.6 V -24mA 22 ns @ 50 pF 1.65 V 24mA
RS庫存編號 171-3159
製造零件編號TC7SZ86FU
BrandToshiba
HK$0.852
/個 (每包:100個)
單位
XOR Surface Mount 1 2 - SOT-353 5 - CMOS 5.5 V -32mA 13.5 ns @ 15 pF 1.65 V 32mA
RS庫存編號 171-3400
製造零件編號74VHC32FT
BrandToshiba
HK$1.318
/個 (每包:50個)
單位
OR Surface Mount 4 2 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 14.5 ns @ 50 pF 2 V 8mA
RS庫存編號 541-9718
製造零件編號TC74AC00F(F)
BrandToshiba
HK$4.328
/個 (每包:5個)
單位
NAND Surface Mount 4 2 No SOP 14 AC - 5.5 V -24mA 7 ns @ 5 V, 11.2 ns @ 3.3 V 2 V 24mA
RS庫存編號 171-3150
製造零件編號TC7SH09F
BrandToshiba
HK$1.065
/個 (每包:50個)
單位
AND Surface Mount 1 2 - SOT-25 5 - CMOS 5.5 V - 14 ns @ 50 pF 2 V 8mA
RS庫存編號 171-3329
製造零件編號74VHC21FT
BrandToshiba
HK$0.817
個 (在毎卷:2500)
單位
AND Surface Mount 2 4 - TSSOP 14 74VHC CMOS, TTL 5.5 V -8mA 13.5 ns @ 50 pF 2 V 8mA
RS庫存編號 144-5324
製造零件編號TC7SZ32FU,LJ(CT
BrandToshiba
HK$0.837
/個 (每包:50個)
單位
OR Surface Mount 1 2 - SOT-353 5 CMOS CMOS 5.5 V dc - 12 ns @ 50 pF 1.65 V dc -
RS庫存編號 171-3310
製造零件編號74VHC03FT
BrandToshiba
HK$0.801
個 (在毎卷:2500)
單位
NAND Surface Mount 4 2 - TSSOP 14 74VHC CMOS, TTL 5.5 V - 14.5 ns @ 50 pF 2 V 8mA
RS庫存編號 171-3490
製造零件編號74VHCT32AFT
BrandToshiba
HK$1.516
/個 (每包:50個)
單位
OR Surface Mount 4 2 - TSSOP 14 74VHCT CMOS, TTL 5.5 V -8mA 9.5 ns @ 50 pF 4.5 V 8mA
RS庫存編號 144-5122
製造零件編號TC7S08F,LF(T
BrandToshiba
HK$0.704
個 (在毎卷:3000)
單位
AND Surface Mount 1 2 - SSOP 5 CMOS CMOS 6 V dc - 125 ns @ 50 pF 2 V dc -
RS庫存編號 171-3355
製造零件編號74VHCT00AFT
BrandToshiba
HK$0.878
個 (在毎卷:2500)
單位
NAND Surface Mount 4 2 - TSSOP 14 74VHCT CMOS, TTL 5.5 V -8mA 10 ns @ 50 pF 4.5 V 8mA
RS庫存編號 171-3047
製造零件編號TC7WZ02FU
BrandToshiba
HK$0.876
個 (在毎卷:3000)
單位
NOR Surface Mount 2 2 - SOT-505 8 - CMOS 5.5 V -32mA 10 ns @ 15 pF 1.65 V 32mA
RS庫存編號 601-4257
製造零件編號TC74VCX02FT
BrandToshiba
HK$7.008
/個 (每包:5個)
單位
NOR Surface Mount 4 2 No TSSOP 14 VCX - 3.6 V -24mA 2.8 ns @ 3.3 V, 3.7 ns @ 2.5 V, 7.4 ns @ 1.8 V 1.2 V 24mA
RS庫存編號 601-4730
製造零件編號TC74VCX32FT
BrandToshiba
HK$4.74
/個 (每包:5個)
單位
OR Surface Mount 4 2 No TSSOP 14 VCX - 3.6 V -24mA 2.8 ns @ 3.3 V, 3.7 ns @ 2.5 V, 7.4 ns @ 1.8 V 1.2 V 24mA
RS庫存編號 171-3573
製造零件編號74LCX86FT
BrandToshiba
HK$1.485
/個 (每包:50個)
單位
XOR Surface Mount 4 2 - TSSOP 14 74LCX CMOS 3.6 V -24mA 38.5 ns @ 50 pF 1.65 V 24mA