The M48T129V-85PM1 is a high-performance, 3.3V Timekeeper® SRAM manufactured by STMicroelectronics, designed to provide a robust memory and real-time clock solution for a wide range of applications. This integrated device combines 1 Mbit (128K x 8) of static RAM with a built-in real-time clock/calendar (RTC) and a programmable alarm, all in a convenient 28-pin SOIC (Small Outline Integrated Circuit) package.

Key Features

• Integrated Real-Time Clock (RTC): Accurate tracking of seconds, minutes, hours, day, date, month, and year until the year 2100, with leap year compensation.
• Low Power Consumption: Optimized for low power consumption, making it suitable for battery-backed applications that require long-term data and timekeeping retention.
• Programmable Alarm: The alarm function allows users to set a wakeup signal on a specific date, day of the week, or on a monthly basis, providing versatility for task scheduling and system management.
• Automatic Battery Switch-over: In the event of a power failure, the device automatically switches to the battery supply, ensuring uninterrupted operation of the clock and data retention.
• Watchdog Timer: A programmable watchdog timer provides a system reset in cases where the system hangs or fails to respond, enhancing system reliability.
• 28-pin SOIC Package: The compact package allows for a space-saving design, ideal for applications with limited PCB real estate.

Applications

The M48T129V-85PM1 is ideal for a variety of applications where reliable timekeeping and data storage are essential. It is commonly used in:

• Industrial systems and controls
• Utility meters
• POS terminals
• Medical devices
• Security systems
• Telecommunication equipment

Technical Specifications

With an access time of 85 ns, the M48T129V-85PM1 provides quick data retrieval, ensuring efficient operation in time-critical applications. The device operates over a wide temperature range, making it suitable for use in diverse environmental conditions.

For detailed specifications and application support, STMicroelectronics provides datasheets, technical documents, and design resources to assist in the integration of the M48T129V-85PM1 into your next project.