STMicroelectronics M48T86MH1E Real-Time Clock

The M48T86MH1E is a 5.0 V PC real-time clock (RTC) from STMicroelectronics designed to address the needs of high-performance computers, advanced telecommunications systems, and other digital devices where accurate timekeeping is paramount. It integrates a high-precision timekeeping chip that includes 114 bytes of battery-backed static RAM.

Key Features

• Integrated Power-Sense Circuit: The device features an automatic power-fail chip deselect and write protection, ensuring data integrity during power loss.
• Battery Backup: With a built-in battery input, it maintains accurate timekeeping and preserves RAM contents, even when the main power is lost.
• High Data Retention: The M48T86MH1E offers a high data retention capability provided by the additional static RAM.
• Programmable Alarm: A programmable alarm function allows for a versatile reminder system or timer to initiate system tasks.
• Timekeeping: It includes clock/calendar functionality with seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year.

Applications

The M48T86MH1E is suitable for a wide range of applications in various fields such as:

• Computing systems like servers and workstations
• Telecommunication systems such as routers and switches
• Industrial systems with embedded controllers
• POS terminals and other retail equipment
• Medical equipment requiring precise timekeeping

Technical Specifications

The RTC operates over a temperature range of 0°C to +70°C and offers a clock accuracy of ±1 minute/month at 25°C. It is packaged in a 24-pin, 600 mil DIP, making it easy to integrate into a variety of system designs.

The M48T86MH1E is a reliable and robust real-time clock module that provides all the necessary features to maintain timekeeping and data security in critical systems. Its combination of features makes it a versatile choice for designers looking to implement an RTC in their products.