Maxim Integrated DS1742-85 Nonvolatile Timekeeping RAM

The DS1742-85 is a state-of-the-art nonvolatile timekeeping RAM module designed and manufactured by Maxim Integrated. This innovative memory module integrates a full-function, real-time clock, 32,768 bytes of static RAM, a power-fail control circuit, and a lithium energy source into a compact, monolithic integrated circuit. Its design ensures that data and time information are maintained in the absence of an external power supply.

With a wide voltage range of 4.5V to 5.5V, the DS1742-85 provides a highly reliable solution for applications requiring continuous timekeeping and data storage operations. Its real-time clock (RTC) feature includes an oscillator, which is temperature-compensated and highly stable, guaranteeing precise time tracking over a broad temperature range of -40°C to +85°C. This makes the DS1742-85 an ideal choice for industrial applications where extreme temperatures are common.

The module's nonvolatile RAM is directly accessed like a conventional 2k x 8 static RAM using the JEDEC standard 24-pin DIP package. This feature provides seamless integration into existing systems without the need for complex interfacing or additional components. It also allows for easy memory expansion or replacement without the risk of data loss during power transitions.

One of the key benefits of the DS1742-85 is its integrated power-fail control circuit, which automatically switches to the onboard lithium battery when external power is lost. This ensures that the clock continues to run and the memory retains its contents. The battery has a lifespan of over 10 years, reducing maintenance and providing peace of mind for long-term applications.

In summary, the Maxim Integrated DS1742-85 is a robust, high-performance module that combines the functionality of a real-time clock and nonvolatile RAM. Its durable design, wide operating temperature range, and integrated power-fail circuit make it an excellent choice for systems that require reliable timekeeping and data retention capabilities, even in the most demanding environments.