Logic Gates - Logic gates serve as the building blocks to digital logic circuits using combinational logic. We're going to consider the following gates: NOT gates (also called inverters), AND gates, OR gates, NAND gates, NOR gates, XOR gates, and XNOR gates.
Truth Table - A truth table shows how a logic circuit's output responds to various combinations of the inputs, using logic 1 for true and logic 0 for false. All permutations of the inputs are listed on the left, and the output of the circuit is listed on the right. The desired output can be achieved by a combination of logic gates. A truth table for two inputs is shown, but it can be extended to any number of inputs. The input columns are usually constructed in the order of binary counting with a number of bits equal to the number of inputs.
LOGIC GATES and TRUTH TABLE
74 series logic IC datasheets!
| part # | description |
| 74LS00 | Quad 2-Input NAND Gate |
| 74LS01 | Quad 2-Input NAND Gate; Open Collector Outputs |
| 74LS02 | Quad 2-Input NOR Gate |
| 74LS03 | Quad 2-Input NAND Gate; Open Collector Outputs |
| 74LS04 | Hex Inverter |
| 74LS05 | Hex Inverter; Open Collector Outputs |
| 74LS06 | Hex Inverter; Open Collector High Voltage Outputs |
| 74LS07 | Hex Buffer; Open Collector High Voltage Outputs |
| 74LS08 | Quad 2-Input AND Gate |
| 74LS09 | Quad 2-Input AND Gate; Open Collector Outputs |
| 74LS10 | Triple 3-Input NAND Gate |
| 74LS11 | Triple 3-Input AND Gate |
| 74LS12 | Triple 3-Input NAND Gate; Open Collector Outputs |
| 74LS13 | Dual 4-Input NAND Schmitt Triggers |
| 74LS14 | Hex Schmitt-Trigger Inverter |
| 74LS15 | Triple 3-Input AND Gate; Open Collector Outputs |
| 74LS16 | Hex Inverter; Open Collector 15V Outputs |
| 74LS17 | Hex Driver; Open Collector 15V Outputs |
| 74LS19 | NAND Schmitt Trigger; Totem Pole Output |
| 74LS20 | Dual 4-Input NAND Gate |
| 74LS21 | Dual 4-Input AND Gate; Open Collector Outputs |
| 74LS22 | Dual 4-Input NAND Gate; Open Collector Outputs |
| 74LS23 | 2x Four input NOR with Strobe |
| 74LS25 | 2x Four input NOR with Strobe |
| 74LS26 | Quad 2-Input NAND Gate; OC (15V) |
| 74LS27 | Triple 3-Input NOR Gate |
| 74LS28 | Quad 2-Input NOR Gates |
| 74LS30 | 8-Input NAND Gate |
| 74LS31 | Delay Element |
| 74LS32 | Quad 2-Input OR Gate |
| 74LS33 | Quad 2-Input NOR Gate; Open Collector Outputs |
| 74LS37 | Quad 2-Input NAND Gates |
| 74LS38 | Quad 2-Input NAND Gates; Open Collector Outputs |
| 74LS39 | 4x Two input NAND, Open collector |
| 74LS40 | Dual 4-Input NAND Gates |
| 74LS42 | BCD to DECIMAL Decoder |
| 74LS45 | Four-to-Ten (BCD to Decimal) DECODER, High current |
| 74LS46 | BCD to Seven-Segment DECODER, Open Collector, lamp test and leading zero handling |
| 74LS47 | BCD to 7-Segment Decoder; Open Collector Outputs (15V) |
| 74LS48 | BCD to 7-Seg Decoder; Outputs Active high |
| 74LS49 | BCD to 7-Seg Decoder-Outputs Active High |
| 74LS50 | 2x (Two input AND) NOR (Two input AND), expandable |
| 74LS51 | Dual AND-OR-INVERT Gates |
| 74LS53 | NOR of Four Two input ANDs, expandable |
| 74LS54 | 4-Wide AND-OR-INVERT Gate |
| 74LS55 | 4-Wide; 2-Input AND-OR-INVERT Gate |
| 74LS56 | Frequency Divider |
| 74LS57 | Frequency Divider |
| 74LS64 | 4-3-2-2 AND-OR-INVERT |
| 74LS65 | 4-3-2-2 AND-OR-INVERT |
| 74LS68 | Dual 4-Bit Decade or Binary Counter |
| 74LS69 | Dual 4-Bit Decade or Binary Counter |
| 74LS70 | 1x gated JK FLIPFLOP with preset and clear |
| 74LS72 | 1x gated JK FLIPFLOP with preset and clear |
| 74LS73 | Dual J-K Flip-Flop |
| 74LS74 | Dual D-Type Flip-Flop |
| 74LS75 | Dual 2-Bit D-Type Flip-Flop |
| 74LS76 | Dual J-K Flip-Flop |
| 74LS77 | 4-Bit D-Type Latch |
| 74LS78 | Dual J-K Flip-Flop |
| 74LS83 | 4-Bit Full Adder |
| 74LS85 | 4-Bit Comparator |
| 74LS86 | Quad Exclusive OR Gate |
| 74LS90 | Decade Counter |
| 74LS91 | 8-Bit Shift Register |
| 74LS92 | Divide-By-12 Counter |
| 74LS93 | 4-Bit Binary Counter |
| 74LS94 | Four bit SHIFT register |
| 74LS95 | 4-Bit Shift Register with Parallel Inputs and Outputs |
| 74LS96 | 5-Bit Shift Register with Parallel Inputs and Outputs |
| 74LS107 | Dual J-K Master Slave Flip-Flop |
| 74LS109 | Dual J-K Flip-Flop |
| 74LS112 | Dual J-K Flip-Flop with Preset and Clear |
| 74LS113 | Dual J-K Flip-Flop |
| 74LS114 | Dual J-K Flip-Flop |
| 74LS116 | 2x Four bit LATCH with clear |
| 74LS121 | Monostable Multivibrator |
| 74LS122 | Retriggerable Monostable Multivibrator |
| 74LS123 | Retriggerable Monostable Multivibrator |
| 74LS124 | 2x Clock Generator or Voltage Controlled Oscillator |
| 74LS125 | Quad Line Driver; 3-State Outputs |
| 74LS126 | Quad Line Driver; 3-State Outputs |
| 74LS128 | 4x Two input NOR, Line driver |
| 74LS130 | Retriggerable Monostable Multivibrator |
| 74LS132 | Quad 2-Input NAND Schmitt Trigger |
| 74LS133 | 13-Input NAND Gate |
| 74LS134 | Twelve input NAND, Tri-state |
| 74LS135 | 4x Two input XOR (exclusive or) |
| 74LS136 | Quad 2-Input Exclusive OR Gates |
| 74LS137 | 3-Line to 8-Line Demultiplexer with Address Latch |
| 74LS138 | 3-Line to 8-Line Demultiplexer |
| 74LS139 | 2-Line to 4-Line Decoder/Demultiplexer |
| 74LS140 | 2x Four input NAND, 50 ohm Line Driver |
| 74LS143 | Four bit counter and latch with 7-segment LED driver |
| 74LS145 | BCD to Decimal Decoder/Driver |
| 74LS147 | 10-Line to 4-Line Priority Encoder |
| 74LS148 | 8-Line to 3-Line Priority Encoder |
| 74LS150 | 16-1 SELECTOR (multiplexer) |
| 74LS151 | 8-Line to 1-Line Multiplexer |
| 74LS153 | Dual 4-Line to 1-Line Multiplexer |
| 74LS154 | 4-Bit Binary Decoder/Demultiplexer |
| 74LS155 | Dual 2-Bit Binary Decoders/Demultiplexer |
| 74LS156 | Dual 2-Bit Binary Decoders/Demultiplexer |
| 74LS157 | Quad 2-Line to 1-Line Multiplexer |
| 74LS158 | Quad 2-Line to 1-Line Multiplexer |
| 74LS159 | 4-16 DECODER (demultiplexer), Open collector |
| 74LS160 | 4-Bit Synchronous Programmable Counter |
| 74LS161 | 4-Bit Synchronous Programmable Counter |
| 74LS162 | 4-Bit Synchronous Programmable Counter |
| 74LS163 | 4-Bit Synchronous Programmable Counter |
| 74LS164 | 8-Bit Shift Register with Parallel Outputs |
| 74LS165 | 8-Bit Shift Register with Parallel Inputs |
| 74LS166 | 8-Bit Shift Register with Parallel Inputs |
| 74LS168 | Up/Down 4-Bit Synchronous Counter |
| 74LS169 | Up/Down 4-Bit Synchronous Counter |
| 74LS170 | 16-Bit RAM; Open Collector Outputs |
| 74LS173 | 4-Bit Quad D-Type Flip-Flops; 3-State Outputs |
| 74LS174 | Hex D-Type Flip-Flop |
| 74LS175 | Quad D-Type Flip-Flop |
| 74LS180 | Four bit parity checker |
| 74LS181 | 4-bit Arithmetic Logic Unit |
| 74LS182 | Look Ahead Carry Generator |
| 74LS183 | Dual Carry-Save Full Adder |
| 74LS190 | Synchronous Up/Down Decade Counter |
| 74LS191 | Synchronous Up/Down 4-Bit Binary Counter |
| 74LS192 | Synchronous Up/Down Decade Counter |
| 74LS193 | Synchronous Up/Down 4-Bit Binary Counter |
| 74LS194 | 4-Bit Bidirectional Shift Register |
| 74LS195 | 4-Bit Parallel-Access Shift Register |
| 74LS196 | Programmable Decade Counter |
| 74LS197 | Programmable Decade Counter |
| 74LS198 | Eight bit parallel in and out bidirectional SHIFT register |
| 74LS199 | Eight bit parallel in and out bidirectional SHIFT register, JK serial input |
| 74LS221 | Dual Monostable Multivibrator; Schmitt-Trigger Input |
| 74LS240 | Octal Inverting Buffer/Transciever; 3-State Outputs |
| 74LS241 | Octal Buffer/Transciever; 3-State Outputs |
| 74LS242 | Quad 3-State Bus Transceiver |
| 74LS243 | 4-Bit Bidirectional Bus Driver |
| 74LS244 | Octal 3-State Noninverting Buffer |
| 74LS245 | Octal 3-State Noninverting Bus Transceiver |
| 74LS247 | BCD to 7-Seg Decoder/Display Driver OC (15V) |
| 74LS248 | BCD to 7-Seg Decoder/Display Driver OC (15V) |
| 74LS249 | BCD to 7-Seg Decoder/Display Driver OC (15V) |
| 74LS251 | 8-Line to 1-Line Multiplexer; 3-State Outputs |
| 74LS253 | Dual 4-Input Data Selecttor/Multiplexer 3-State |
| 74LS256 | Dual 4-Bit Addressable Latch |
| 74LS257 | Quad 2-Line to 1-Line Multiplexers; 3-State Outputs |
| 74LS258 | Quad 2-Line to 1-Line Multiplexers; 3-State Outputs |
| 74LS259 | 8-Bit Adressable Latch |
| 74LS260 | Dual 5-Input NOR Gate |
| 74LS266 | Quad Exclusive NOR Gate |
| 74LS269 | 8-BIT BIDIRECTIONAL BINARY COUNTER |
| 74LS273 | Octal D-Type Flip-Flop; Common Clock and Clear |
| 74LS279 | Quad SR-Flip-Flops |
| 74LS280 | 9-Bit Parity checker |
| 74LS283 | 4-Bit Full Adder |
| 74LS290 | 4-Bit Decade/Binary Counter |
| 74LS298 | Quad 2-Line to 1-Line Multiplexers with Latch |
| 74LS299 | 8-Bit Bidirectional Universal Shift Register |
| 74LS322 | 8-Bit Sign-Extend Shift Register |
| 74LS323 | 8-Bit Universal Shift Register with Latch |
| 74LS348 | 8-Line to 3-Line Priority Encoder with 3-State Outputs |
| 74LS352 | Dual 4-Line to 1-Line Multiplexers |
| 74LS353 | Dual 4-Line to 1-Line Multiplexers with 3-State Outputs |
| 74LS365 | Hex Bus Line Drivers |
| 74LS366 | 3-State Hex Line Driver |
| 74LS367 | Hex Bus Line Drivers |
| 74LS368 | Hex Inverting Bus Line Drivers |
| 74LS373 | Octal D-Type Latch |
| 74LS374 | Octal D-Type Flip-Flop |
| 74LS375 | Quad D-Type Latch |
| 74LS377 | Octal D-Type Flip-Flop |
| 74LS378 | Hex D-Type Flip-Flop |
| 74LS379 | Quad D-Type Flip-Flop |
| 74LS386 | Quad 2-Input Exclusive OR Gates |
| 74LS390 | Dual Decade Counters |
| 74LS393 | Dual Decade Counters |
| 74LS395 | 4-Bit Shift Register with 3-State Outputs |
| 74LS398 | Quad 2-Input Register |
| 74LS399 | Quad 2-Input Register |
| 74LS490 | Dual Decade Counter |
| 74LS521 | 8-BIT IDENTITY COMPARATOR |
| 74LS533 | Octal D-Type Transparent Latche |
| 74LS534 | Octal Invering D-Type Flip-Flop |
| 74LS538 | 1-OF-8 DECODER WITH 3-STATE OUTPUTS |
| 74LS540 | 8-Bit Inverting Line Driver |
| 74LS541 | OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS |
| 74LS543 | OCTAL REGISTERED TRANSCEIVER, NON-INVERTING, 3-STATE |
| 74LS544 | OCTAL REGISTERED TRANSCEIVER, INVERTING, 3-STATE |
| 74LS568 | 4-BIT BIDIRECTIONAL COUNTERS (WITH 3-STATE OUTPUTS) |
| 74LS569 | 4-Bit Synchronous Counter |
| 74LS574 | 8-Bit D-Type Flip-Flop/Bus Driver |
| 74LS579 | 8-BIT BIDIRECTIONAL BINARY COUNTER (3-STATE) |
| 74LS620 | OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS (INVERTING AND NONINVERTING) |
| 74LS623 | Octal Bus Transcievers |
| 74LS629 | Voltage Controlled Oscilator |
| 74LS640 | Octal Bus Transciever |
| 74LS646 | Octal Bus Transciever |
| 74LS648 | Octal Bus Transciever/Register |
| 74LS657 | OCTAL BIDIRECTIONAL TRANSCEIVER WITH 8-BIT PARITY GENERATOR CHECKER (3-STATE OUTPUTS) |
| 74LS669 | 4-Bit Synchronous Up/Down Counter |
| 74LS670 | 4-By-4 Register File; 3-State Outputs |
| 74LS682 | 8-Bit Magnitude/Identity Comparator |
| 74LS684 | 8-Bit Magnitude Comparators |
| 74LS688 | 8-Bit Magnitude Comparators |
| 74LS748 | 8-Line to 3-Line Priority Encoder |
| 74LS779 | 8-BIT BIDIRECTIONAL BINARY COUNTER (3-STATE) |
| 74LS795 | Octal Buffer with 3-State Outputs |
| 74LS848 | 8-Line to 3-Line Priority Encoder with 3-State Outputs |
| 74LS2245 | 25Ohm Octal Bidirectional Transceiver With 3-State Inputs and Outputs |
| 74LS3893 | QUAD FUTUREBUS BACKPLANE TRANSCEIVER (3 STATE + OPEN COLLECTOR) |
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REFEERENCES:
http://www.skot9000.com/ttl/
REFEERENCES:
http://www.skot9000.com/ttl/
http://williams.comp.ncat.edu/COMP370/LogicGates.pdf
http://www.cs.umd.edu/class/sum2003/cmsc311/Notes/Comb/gates.html
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/truth.html
https://courses.cs.washington.edu/courses/cse370/09au/pdfs/lectures/04-Logic%20gates.pdf
http://www.usna.edu/Users/cs/vincent/suppnotes/Logic%20Gates%20student%20version.pdf
http://www.cs.umd.edu/class/sum2003/cmsc311/Notes/Comb/gates.html
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/truth.html
https://courses.cs.washington.edu/courses/cse370/09au/pdfs/lectures/04-Logic%20gates.pdf
http://www.usna.edu/Users/cs/vincent/suppnotes/Logic%20Gates%20student%20version.pdf
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