STMicroelectronics M48Z129V-85PM1

The M48Z129V-85PM1 is a 3.3V, 1 Mbit (128Kb x8) Timekeeper SRAM designed by STMicroelectronics. This non-volatile memory integrates a quartz crystal and a lithium battery, which ensures that data is preserved and the real-time clock (RTC) is maintained in the absence of an external power supply.

Key Features

• Integrated Power-Fail Deselect (PFD) Circuitry: Automatically switches to the battery supply during power failures, safeguarding data integrity and maintaining the RTC operation.
• Self-Contained Battery and Crystal: Encapsulated within the package, this design simplifies the system integration by reducing the need for external components.
• Low Power Consumption: Optimized for battery-backed applications, the M48Z129V-85PM1 is designed to have a minimal impact on the battery life.
• Real-Time Clock (RTC): Includes an RTC that provides timekeeping with seconds, minutes, hours, day, date, month, and year information. The RTC has leap year correction and is Y2K compliant.
• Software Controlled Write Protection: Offers the ability to protect specific blocks of memory via software, preventing accidental data corruption.
• High Data Retention: Data is guaranteed to be retained for a minimum of 10 years in the absence of power, making it ideal for long-term critical data storage.
• Access Time: The access time of 85ns allows for quick read and write operations, which is suitable for high-performance computing needs.
• Package: Supplied in a 28-pin, 600 mil SOIC package, the M48Z129V-85PM1 is designed for easy PCB layout and is compatible with standard IC sockets.

Applications

The M48Z129V-85PM1 is ideal for a wide range of applications that require reliable data storage and a precise time reference even when the main power supply is unavailable. Typical applications include:

• Industrial control systems
• Utility meters
• POS terminals
• Medical devices
• Security systems

With its robust feature set and integrated design, the M48Z129V-85PM1 from STMicroelectronics offers a comprehensive solution for systems that cannot afford to lose data or time accuracy due to power interruptions.