DS87C520QCL(PLUS)C29 – DALLAS

The DS87C520QCL(PLUS)C29 is a high-speed, 8-bit microcontroller from the Dallas Semiconductor (now Maxim Integrated) DS87C520 family. It features an enhanced 8051 core, offering significantly improved performance compared to standard 8051 derivatives. The “PLUS” designation indicates an enhanced feature set, likely including increased on-chip RAM and/or additional peripherals. The QCL package denotes a ceramic leaded chip carrier (CLCC) package, providing hermetic sealing for high-reliability applications and extended temperature range operation. The “C29” likely represents a specific mask revision or production lot code. Being RoHS compliant, the device adheres to Restriction of Hazardous Substances directives, limiting the use of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), and polybrominated diphenyl ethers (PBDE) in its construction. It is designed for embedded control applications requiring robust performance and environmental compliance.