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

Answer Posted / balasubramanian

8051
8-8bit controller(Data BUS)
0-Romless device(except 8051,8052 has internal ROM) but 8031 other are dont have Internal ROM
5-5 interrupts(INT0,TF0,INT1,TF1,TI+RI)
1-Serial Communication(8-bit UART)

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