STMicroelectronics M48T201V-85MH1F

The M48T201V-85MH1F is a high-performance, integrated Timekeeper® SRAM and real-time clock (RTC) module designed and manufactured by STMicroelectronics. This product is a perfect solution for applications that require both volatile memory and timekeeping functionalities in a single, compact package. The device combines a 2 Mbit (256K x 8) static RAM with a software-compatible real-time clock, an embedded crystal, and a lithium battery. This integration ensures long-term data retention and accurate timekeeping even when the main power supply is disconnected.

One of the key features of the M48T201V-85MH1F is its fast 85ns access time, which allows for quick data retrieval, making it suitable for high-speed microprocessor systems. The module operates within a supply voltage range of 4.5V to 5.5V, which is typical for 5V systems, ensuring compatibility with a wide range of applications.

The real-time clock provides all the necessary functions to track time, including seconds, minutes, hours, day, date, month, and year, with the added advantage of leap year compensation valid up to the year 2100. The clock operates in either 24-hour or 12-hour format with an AM/PM indicator. A programmable alarm feature is available, which can be set to trigger on a specific minute, hour, day, or date, providing versatility for time-based event management.

The M48T201V-85MH1F also features a WRITE protect function, ensuring that the clock and memory are protected from inadvertent writes during power-up, power-down sequences, or when the voltage drops below a predefined threshold. This feature is essential for maintaining data integrity and preventing data corruption.

Encased in a 44-pin SOIC (SOJ) package, the M48T201V-85MH1F is designed for surface mount technology, offering a space-saving solution for PCB design. The module's integrated battery and crystal reduce the number of external components required, simplifying the design process and reducing overall system cost.

Overall, the M48T201V-85MH1F from STMicroelectronics is a robust and reliable choice for designers looking for a memory and real-time clock solution that delivers high performance, data integrity, and long-term reliability in a variety of applications, including embedded systems, industrial controllers, and communication equipment.