Maxim Integrated DS1747-70: Timekeeping RAM with Hardware Watchdog Timer

The DS1747-70 from Maxim Integrated is a versatile memory and real-time clock module that provides a full-featured timekeeping solution for systems requiring durable and reliable non-volatile memory. This integrated device combines 64K x 8 non-volatile static RAM, a real-time clock, a crystal, a lithium battery, and a watchdog timer in a single monolithic package, offering a compact and comprehensive timekeeping solution.

One of the key features of the DS1747-70 is its full clock calendar functionality which includes seconds, minutes, hours, day, date, month, and year information. The real-time clock (RTC) is designed to be accurate up to the year 2100, with automatic leap year compensation. This ensures long-term reliability for applications that require precise time tracking over extended periods.

Additionally, the device includes a programmable watchdog timer, which provides system security by initiating a system reset if the system fails to strobe within a preset time frame. This feature is crucial for systems that cannot afford to hang or crash, as it helps to ensure continued operation without manual intervention.

The non-volatile static RAM featured in the DS1747-70 is accessible in the same manner as conventional SRAM, but it retains data when power is lost, thanks to the integrated lithium battery. This makes it an ideal choice for critical data storage in systems where data must be preserved across power cycles.

The DS1747-70 operates over an industrial temperature range of -40°C to +70°C, making it suitable for a wide range of applications in challenging environments. Its 28-pin, 600-mil DIP package allows for straightforward integration into existing designs.

Whether you're designing industrial control systems, utility meters, or other sophisticated electronics, the DS1747-70 offers a reliable and robust timekeeping and memory solution that ensures the safety and integrity of your data.

For more information and to access full datasheets, visit Maxim Integrated's official website or contact your local Maxim Integrated distributor.