why the microcontroller so called 8051?/ and why the IC
starts with 74?

Answer Posted / shyam sundor ghosh

8 mean-8 bit processor 8000series
5 mean-it has five interrupts
1 mean -serial port
so it is called as 8051

IC starts with 74 because we give activation voltage of the
IC at 7 & 4 no. pin of the IC.

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