The 74LS20 is a Dual 4-input NAND gate IC from the TTL family. It integrates two independent NAND gates in a single DIP-14 package. Designed for fast switching and low power dissipation, it’s suitable for use in digital systems requiring multi-input logic conditions.
The 74LS83 is a high-speed 4-bit binary full adder IC that provides fast and reliable binary arithmetic operations. Ideal for digital systems, counters, ALUs, and arithmetic logic applications.