Thus, instead of using a 40-pin DIP package microcontroller to solve a problem that can be solved with an 8-pin SMD low cost microcontroller, we can avoid using a big microcontroller and thereby save valuable PCB space. STC offers microcontrollers in various DIP and SMD IC packages. Some key differences between standard 8051s and STC micros are discussed below: There are some STC microcontrollers like STC89C52RC that are same as the standard ones while some others like STC8A8K64S4A12 are more robust with many advanced features. STC 8051s, as stated, offers additional hardware peripherals when compared to standard 8051s. At present STC has several different variants of 8051s, ranging from standard 40 pin regular DIP 8051s to tiny 8-pin variants. It also manufactures standard 8051s which are designed to fit in place of any other 8051s from any manufacturer. STC took the model of 8051 just like other manufacturers and upgraded it to new levels by implementing some vital upgrades, enhancements and additions. STC (not to be confused with STMicroelectronics) is a Chinese semiconductor manufacturer that operates in the same way as Nuvoton. Recently I covered an article about Nuvoton N76E003 here. There are even some manufacturers who produce micros under their naming convention/branding while maintaining the basic architecture. of them have even added more features like ADCs, communication peripherals like SPI and I2C, etc that were not originally incepted or integrated. Today there are hundreds of such companies which still manufactures this old school legendary micro. Later other manufacturers like Philips (NXP), Atmel (now Microchip), Silicon Labs, Maxim, etc took the 8051 architecture and introduced their variants of 8051s. In the early 1980s, 8051 microcontrollers were first introduced by Intel.
8051 microcontrollers are the first-generation microcontrollers that sparked the modern embedded-system era and established the basic concepts for almost all microcontrollers.
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