Overview
The MCS® 51 microcontroller family offers developers a wide variety of high-integration and cost-effective solutions for virtually every basic embedded control application. From traffic control equipment to input devices and computer networking products, MCS 51 microcontrollers deliver high performance together with a choice of configurations and options matched to the special needs of each application. Whether it's low power operation, higher frequency performance, expanded on-chip RAM, or an application-specific requirement, there's a version of the MCS 51 microcontroller that's right for the job.

When it's time to upgrade product features and functionality, the MCS 51 architecture puts you on the first step of a smooth and cost-effective upgrade path – to the enhanced performance of the MCS® 251 microcontroller.