Logic Circuits
Logic gates, flip-flops and counters are the core decision-making blocks of digital systems. By processing binary (0/1) signals, they underpin every digital operation.
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AND/OR/NOT gates, flip-flops, counters, shift registers and multiplexers are the main types. 74HC, 74LS and CD4000 are the best-known families. Logic family, supply voltage, speed and fan-out matter when choosing one. Counting, data routing and timing are the most common applications.
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Frequently asked questions
What is the difference between the 74HC and 74LS series?+
74LS is based on bipolar technology and draws more power; 74HC is CMOS, uses far less power and works over a wide voltage range. New designs generally prefer 74HC.
What does a flip-flop do?+
A flip-flop is the basic memory element that stores a single bit of data. Counters, registers and state machines are built from flip-flops.
Where are logic gates used?+
Logic gates are used in simple decision and control circuits, in combining/splitting signals, and where fast hardware logic is needed without a microcontroller.