The 74LS93 is a 4-bit binary counter made of two up-counters. The IC consists of a mode-2 up-counter and a mod-8 up counter. Can be combined as mod-8 counter or divide by 2 or divide by 8 applications. It is built using four JK Flip Flops.
The TDA7279 is a 15W + 15W Stereo dual bridge Amplifier. It is 15 Pin class AB type amplifiers and has an operating voltage from 6V to 18V. It is typically operated at 12V in portable battery powered audio applications like Radio, Bluetooth speakers etc..
The 74LS83 is a high speed 4-bit fuller Adder IC with carry out feature. The IC has four independent stages of full adder circuits in a single package. It is commonly used in applications where arithmetic operations are involved.
The CD4052 is a 4-Channel Multiplexer and Demulitplexer IC. It can either be used as a 4:1 Multiplexer or 1:4 Demultiplexer. The IC supports both Analog and Digital voltages and hence widely used in many designs.
The CD4027 is a CMOS based high voltage high speed Dual JK Flip-Flop package. The Flip-Flop could typically operate at a speed of 16MHz even at high voltages like 15V with a low noise margin of only 2.5V.