STMicroelectronics M48T35Y-70MHL Timekeeper SRAM

The M48T35Y-70MHL is a high-performance, 256 Kbit (32K x 8) Timekeeper SRAM designed and manufactured by STMicroelectronics. This integrated device combines a low-power SRAM with a precision real-time clock (RTC), a crystal, and a power-fail control circuit in a single 28-pin, 5V SOIC package. It is engineered to maintain full functionality in a wide range of applications requiring a reliable non-volatile memory with an embedded timekeeping feature.

Key Features

• Integrated Real-Time Clock (RTC): The device includes a built-in RTC that keeps track of seconds, minutes, hours, day, date, month, and year information. The clock/calendar provides leap-year compensation up to the year 2100, ensuring accuracy and reliability over time.
• Power-Fail DeSelect (PFD): The M48T35Y-70MHL features an automatic power-fail chip deselect circuitry that switches to battery backup mode during power failures, ensuring data retention without any external components or batteries.
• Low Power Consumption: Designed for energy efficiency, the device operates with very low power consumption, making it suitable for battery-powered systems and applications where power usage is a critical consideration.
• High-Speed SRAM: The non-volatile SRAM provides fast read and write access times of 70 ns, allowing for high-speed data processing and quick access to stored information.
• Battery Backup: An embedded lithium battery provides a long-term backup for the RTC and SRAM, ensuring data and timekeeping integrity during power outages.

Applications

The M48T35Y-70MHL is ideal for a broad range of applications, including:

• Industrial control systems
• Utility meters
• POS terminals
• Network routers, switches, and bridges
• Medical equipment
• Automotive electronics

This Timekeeper SRAM from STMicroelectronics is a robust and reliable solution for systems that require accurate timekeeping combined with non-volatile data storage. Its integration of memory and real-time clock functionality, along with its ease of use, makes it a popular choice for designers looking to optimize board space and reduce component count in their designs.