Maxim Integrated DS1543-70: Full-Function Timekeeping RAM

The Maxim Integrated DS1543-70 is a state-of-the-art, full-function timekeeping RAM that combines a full-featured real-time clock/calendar (RTC) and a 32K x 8 nonvolatile static RAM. Designed to provide a comprehensive timekeeping solution, the DS1543-70 offers a wide range of features that make it an ideal choice for applications requiring reliable timekeeping and data storage capabilities without the need for an external battery.

One of the standout features of the DS1543-70 is its integrated crystal and lithium energy source, which ensures a long life and stable operation for over 10 years. This makes it particularly suitable for systems that need to maintain accurate time and date information even in the absence of power. The RTC provides seconds, minutes, hours, day, date, month, and year information, and has automatic leap year compensation valid up to the year 2100.

The device is equipped with a serial interface that simplifies integration into a variety of systems. The nonvolatile static RAM section offers a robust storage solution that retains data in the absence of power, eliminating the need for an external battery. This feature is critical for applications that cannot afford data loss during power outages or when the main power supply is disconnected.

The DS1543-70 operates over a wide temperature range of -40°C to +70°C, making it suitable for use in harsh environments. Its power requirements are minimal, with a typical timekeeping current of less than 1µA, which contributes to the overall energy efficiency of the system it is integrated into.

With its combination of accurate timekeeping, nonvolatile data storage, and a serial interface, the Maxim Integrated DS1543-70 is a versatile component that can be deployed in a wide array of applications, including embedded systems, utility meters, point-of-sale terminals, and many other electronic devices that require reliable time and data retention without external power.

The DS1543-70 is available in a 28-pin EDIP or 24-pin SO package, providing flexibility for various design layouts and space constraints.