Maxim Integrated DS1251Y-70+ Nonvolatile Timekeeping RAM

The DS1251Y-70+ is a high-performance, 3.3V/5V 4096 x 8 Nonvolatile Timekeeping RAM designed by Maxim Integrated. This innovative product integrates a full-featured real-time clock (RTC) and a 32K x 8 nonvolatile static RAM (NV SRAM) to provide a robust timekeeping and memory solution for a wide array of applications. The device is specifically engineered to maintain data and accurate timekeeping in the absence of an external power supply, thanks to its built-in lithium battery.

One of the key features of the DS1251Y-70+ is its ability to automatically switch to the backup battery when a power failure is detected, ensuring that the timekeeping function continues uninterrupted. The RTC provides information including seconds, minutes, hours, day, date, month, and year, and is capable of automatically adjusting for months with fewer than 31 days, including corrections for leap year. The clock operates in either 24-hour or 12-hour format with an AM/PM indicator.

The DS1251Y-70+ offers a wide operating temperature range of -40°C to +85°C, making it suitable for demanding environments and applications. It also features a programmable interrupt function, which can be set to a square wave output for periodic interrupts or to a specific date and time. This allows for scheduled wake-ups and other time-sensitive operations, making it an ideal component for embedded systems, utility meters, and other time-critical applications.

For data protection, the device includes a write protection mechanism that can be controlled via software commands. This feature provides security for critical data, preventing accidental or unauthorized alterations. The DS1251Y-70+ is available in a 28-pin EDIP or 32-pin TSOC package, providing flexibility for various design requirements.

Overall, the DS1251Y-70+ from Maxim Integrated is a reliable and versatile choice for maintaining precise time and data storage across power cycles, making it a valuable component for designers looking to enhance the functionality and resilience of their systems.