Maxim Integrated DS1251W-120+ Nonvolatile Timekeeping RAM

The DS1251W-120+ is a high-performance, full-featured nonvolatile timekeeping RAM produced by Maxim Integrated. This component integrates a full-function, battery-backed real-time clock (RTC) with a 128k x 8 nonvolatile static RAM. Designed to retain data and time information over a wide temperature range, it's an ideal solution for applications requiring reliable data storage and precise timekeeping in the event of a power failure.

One of the key features of the DS1251W-120+ is its built-in lithium energy source and control circuitry, which ensures that the timekeeping and RAM functions continue to operate even when the main power is lost. This makes it perfect for critical data retention applications such as industrial control systems, utility meters, and medical devices, where data integrity and uptime are paramount.

The DS1251W-120+ operates in a wide voltage range of 4.5V to 5.5V and offers a fast access time of 120 ns, which allows for quick data retrieval and storage. It is equipped with a serial real-time clock which provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year.

In addition to its robust timekeeping capabilities, the DS1251W-120+ includes an integrated crystal oscillator which significantly simplifies the design of timekeeping systems by reducing the number of external components required. The device also features a programmable alarm and interrupt function, which can be set to trigger on a specific date, day of the week, or after a specific time interval, providing additional flexibility for system designers.

Enclosed in a reliable, durable enclosure, the DS1251W-120+ comes in an industry-standard 32-pin EDIP package, ensuring easy integration into a variety of system designs. With its combination of nonvolatile RAM, real-time clock, and integrated power source, the DS1251W-120+ from Maxim Integrated is a versatile and reliable choice for maintaining accurate time and secure data across a multitude of applications.