Maxim Integrated DS1744W-120+ Nonvolatile Timekeeping RAM

The DS1744W-120+ is a robust, full-featured nonvolatile timekeeping RAM module designed by Maxim Integrated. This innovative product seamlessly integrates a full-function real-time clock, 32K x 8 nonvolatile static RAM, power-fail control circuit, and lithium battery into a compact, 28-pin, 600-mil EDIP package. The device is specifically engineered to offer a reliable and durable data and time-keeping solution for a wide array of applications ranging from industrial controllers to telecommunications systems.

One of the standout features of the DS1744W-120+ is its ability to retain data and keep time for more than 10 years in the absence of external power. This is made possible by the onboard lithium energy source which is isolated until the power supply drops below a predefined threshold, effectively safeguarding the memory and clock operations during any power outage.

The real-time clock (RTC) component of the DS1744W-120+ is fully accessible in binary format and offers precision timekeeping with leap year compensation valid up to the year 2100. It includes registers for seconds, minutes, hours, day, date, month, and year with an additional control register to manage the clock's operation. The clock accuracy is maintained within the industrial temperature range of -40°C to +85°C, ensuring reliable performance under varying environmental conditions.

With a direct parallel interface, the static RAM can be easily accessed like any other SRAM, making the DS1744W-120+ a versatile and user-friendly component for designs requiring nonvolatile memory. The power-fail control circuit automatically write-protects the memory when the supply voltage falls below a certain threshold, ensuring data integrity during unexpected power interruptions.

Overall, the DS1744W-120+ from Maxim Integrated is a high-quality, dependable choice for systems that require persistent memory and precise timekeeping, even in the face of power instability. Its integration of memory, real-time clock, and power-fail control in a single package makes it a space-saving and cost-effective solution for a multitude of electronic products and applications.