AT89C51 Microcontroller IC 89S51 IC AT89C51-24PI AT89C51-24PU AT89C51-24PC IC DIP-40 40 Pin Leads Microcontroller AT89C51 IC

The AT89C51 is an age old 8-bit microcontroller from the Atmel family. It works with the popular 8051 architecture and hence is used by most beginners till date. It is a 40 pin IC package with 4Kb flash memory. It has four ports and all together provide 32 Programmable GPIO pins. It does not have in-built ADC module and supports only USART communication. Although it can be interfaced with external ADC IC like the ADC084 or the ADC0808.

The AT89C51 is no longer in production and Atmel does not support new design. Instead the new AT89S51 is recommended for new applications. But, since the AT89C51 has a strong community support if your motive is to learn embedded then AT89C51 can still be a good choice.