STMicroelectronics M48Z512AV-85PM1 Timekeeper SRAM

The M48Z512AV-85PM1 is a high-performance 512 Kbit (64K x8) non-volatile static RAM and real-time clock (RTC) module, which is a key product from the renowned semiconductor manufacturer STMicroelectronics. This integrated, battery-backed SRAM with a built-in real-time clock is designed to provide a convenient and reliable solution for systems requiring both volatile and non-volatile memory in a single package, along with the capability to keep accurate time.

The device features a 64K x 8-bit fully static RAM with a non-volatile QuantumTrap technology layer that ensures data retention for over 10 years in the absence of power. This makes it an ideal choice for applications that require data to be preserved during power loss without the need for an external battery. The M48Z512AV-85PM1 operates at a supply voltage of 4.5V to 5.5V, with an access time of 85ns, which allows for quick data retrieval and storage, making it suitable for high-speed microprocessor systems.

One of the key advantages of the M48Z512AV-85PM1 is its integrated real-time clock, which provides a full array of features including seconds, minutes, hours, day, date, month, and year counters with leap year compensation. The clock operates in either 24-hour or 12-hour format with an AM/PM indicator. A precision crystal oscillator ensures accurate timekeeping, and the device also includes an automatic power-fail chip deselect and write protection to safeguard the data during power transitions.

The module comes in a 28-pin, 600 mil SOIC package, making it easy to integrate into a variety of designs without taking up significant board space. It is also designed with a low power consumption profile, which is critical for battery-powered and energy-sensitive applications.

Applications that benefit from the M48Z512AV-85PM1 include industrial control systems, utility meters, security systems, medical devices, and other embedded systems that require reliable timekeeping and data storage. With its combination of volatile and non-volatile memory, integrated RTC, and long-term data retention capabilities, the M48Z512AV-85PM1 is a versatile component that addresses a wide range of memory and timing requirements in complex electronic systems.