STMicroelectronics

M48T86PC1

M48T86PC1 Description

The M48T86PC1 from STMicroelectronics is an obsolete but robust Real-Time Clock (RTC) and Calendar IC designed for embedded systems requiring precise timekeeping and non-volatile storage. Housed in a 24-DIP through-hole package, this parallel-interface device integrates a 114B NVSRAM for data retention, ensuring reliability even during power loss. Operating within a 4.5V to 5.5V supply range, it consumes a maximum of 15mA during timekeeping, making it suitable for low-to-moderate power applications. Its 0°C to 70°C operating temperature range aligns with industrial and commercial use cases.

M48T86PC1 Features

• Clock/Calendar Functionality: Supports 12/24-hour time format (HH:MM:SS) with leap-year compensation, ensuring long-term accuracy.
• Integrated NVSRAM: Combines RTC with 114B of non-volatile SRAM for critical data storage.
• Advanced Features: Includes alarm functionality, square wave output, and battery-backed operation for uninterrupted timekeeping.
• Robust Compliance: ROHS3-compliant and REACH-unaffected, meeting environmental standards.
• Parallel Interface: Simplifies integration with legacy systems compared to serial alternatives.

M48T86PC1 Applications

• Industrial Automation: Ideal for timestamping events in PLCs or control systems.
• Legacy Embedded Systems: Suited for retrofits or designs requiring through-hole mounting and parallel interfacing.
• Medical Devices: Reliable timekeeping for diagnostic equipment where power resilience is critical.
• Telecom Infrastructure: Backup timing for network switches/routers during power disruptions.

Conclusion of M48T86PC1

While obsolete, the M48T86PC1 remains a viable choice for applications demanding high reliability, NVSRAM integration, and parallel interface simplicity. Its alarm, leap-year correction, and battery-backed operation distinguish it from basic RTCs, though modern designs may favor newer serial-interface alternatives. For legacy systems or specific industrial needs, this IC offers a proven balance of precision and durability.