The DS1251WP-CO2 from Maxim Integrated is a highly integrated, battery-backed memory solution that combines a full-featured real-time clock (RTC) with 128k x 8 nonvolatile static RAM. This device is designed to maintain accurate timekeeping while providing secure and persistent storage for critical data in the event of a power failure. The DS1251WP-CO2 is ideal for applications requiring long-term data retention and precise timekeeping, such as industrial control systems, utility meters, and point-of-sale terminals.

Featuring a built-in lithium battery, the DS1251WP-CO2 ensures that the clock and RAM continue to function for years in the absence of external power. The RTC provides seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation valid up to the year 2100. Additionally, an integrated crystal oscillator with high stability minimizes timekeeping errors, making this device a reliable choice for critical applications.

The nonvolatile RAM of the DS1251WP-CO2 is directly accessible like static RAM for easy interfacing with microprocessors, and it is partitioned into 2048 bytes of user NV RAM and 4096 bytes of user ROM. The device also features a programmable interrupt function, which can be set to generate alarms for specific time events, enhancing the device's utility for scheduling and time-sensitive tasks.

The DS1251WP-CO2 is housed in a rugged, 28-pin EDIP (Extended Dual In-line Package) with a water-resistant coating, ensuring its durability and reliability in harsh environments. The device also includes a write-protect function that prevents accidental data alteration during power-down or low voltage conditions. With its combination of nonvolatile storage, precise timekeeping, and robust construction, the DS1251WP-CO2 is a versatile and dependable component for any system requiring long-term data preservation and accurate time management.