Maxim Integrated DS1556W-120IND Nonvolatile Timekeeping RAM

The DS1556W-120IND from Maxim Integrated is a highly reliable, nonvolatile timekeeping RAM that combines a full-featured real-time clock (RTC) and 512k x 8 nonvolatile static RAM. This innovative product is designed to maintain data integrity and provide accurate timekeeping in a wide range of industrial applications, even during power loss or system downtime.

Encased in a robust 34-Pin PowerCap Module (PCM), the DS1556W-120IND is specifically engineered for harsh industrial environments, with an operating temperature range of -40°C to +85°C. It is particularly well-suited for applications requiring data storage and precise timekeeping under extreme conditions, such as telecommunications, networking, data logging, and industrial control systems.

The real-time clock in the DS1556W-120IND provides a full suite of timekeeping features, including seconds, minutes, hours, day, date, month, and year information. The RTC is accurate to ±1 minute per month at 25°C, and the clock automatically adjusts for months with fewer than 31 days, including corrections for leap year. A built-in oscillator compensation circuit ensures long-term accuracy of the clock over temperature and voltage variations.

One of the key features of the DS1556W-120IND is its integrated, lithium energy source that ensures data retention and clock operation for over 10 years in the absence of external power. This makes it an ideal solution for systems that cannot afford to lose critical data or require timekeeping continuity during power outages.

Interfacing with the DS1556W-120IND is made simple through its parallel interface, which is compatible with most microprocessors. The device also includes a write-protect feature that prevents inadvertent writes to the clock or memory, ensuring data integrity.

In summary, the Maxim Integrated DS1556W-120IND Nonvolatile Timekeeping RAM is a powerful and reliable component that offers a combination of nonvolatile RAM storage and precise timekeeping, making it an essential choice for mission-critical industrial applications where data and time accuracy are paramount.