CAST provides a range of 8051s with pre-integrated peripherals and versions to fit every project and every budget.
Super-Fast S8051XC3 is almost 27x faster than the original 8051, with a full set of configurable features and peripherals.
Tiny T8051XC3 is one of the smallest available—saving you power and expense—and ideal for many tasks with a 13.5x speed-up.
Mature R8051XC2 has been production-proven in about a hundred customer devices.
Legacy L8051XC1 is timing-configurable to exactly match old MCUs for quick, budget-saving parts replacement.
These low-risk, royalty-free 8051 MCUs offer simple integration, easy software development, a small silicon footprint, and low power consumption. They provide more than enough computation power for many modern applications—e.g., IoT, wearables, sensor modules, or SoC helpers—and features like very low latency can make them a better choice than many 32-bit processors.
They’re also backed by more years of 8051 IP experience than any other sales, support, and engineering team in the industry, and CAST and our sourcing partner Silesia Devices are ready to help make you successful.