DS87C520MNL/PLUS)M60 – DALLAS

The DS87C520MNL/PLUS)M60 is a high-speed, 8-bit microcontroller from Dallas Semiconductor (now Maxim Integrated), fabricated using a CMOS process. It is a derivative of the industry-standard 8051 architecture, incorporating a high-performance core capable of operating at clock frequencies up to 60 MHz, as indicated by the “M60” suffix. This allows for significantly faster instruction execution compared to traditional 8051 implementations. The “MNL” likely refers to a specific package type, potentially a PLCC or similar, and the “PLUS” designation denotes an enhanced feature set, which may include increased on-chip RAM, additional timers, or improved power management capabilities. The “D/C 0+” marking signifies a date code, indicating the part was manufactured in 2000 or later. The RoHS compliance ensures the device meets Restriction of Hazardous Substances directives for environmental safety.