Maxim Integrated DS1553P-100: Timekeeping RAM with Battery Backup

The DS1553P-100 is a high-quality timekeeping RAM product from Maxim Integrated, known for its reliability and precision. This device integrates a full-function, binary-coded decimal (BCD) clock/calendar, 256 bytes of NV SRAM, and a power-fail switch circuit into a single monolithic chip. The DS1553P-100 is designed to provide a complete solution for timekeeping and data storage that is protected against power loss, making it an ideal choice for a wide range of applications in data logging, industrial control systems, and network hardware.

One of the key features of the DS1553P-100 is its long-lasting lithium battery, which ensures that the clock and RAM can maintain data for over 10 years in the absence of external power. The device operates in a wide voltage range from 2.7V to 3.6V, which allows for flexibility in system power supply design. Furthermore, the DS1553P-100 offers a precision temperature-compensated crystal oscillator, ensuring accurate timekeeping over a broad temperature range.

The DS1553P-100 is housed in a 28-pin EDIP (Encapsulated Dual Inline Package) and is characterized for operation over the industrial temperature range of -40°C to +85°C. Its nonvolatile RAM is accessible in the same manner as a conventional SRAM, but it will retain data without external power. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation valid up to the year 2100.

Additional features of the DS1553P-100 include a programmable alarm and interrupt function, which can be set to trigger on a per-second, per-minute, hourly, daily, or monthly basis. This versatility makes it possible to use the DS1553P-100 for real-time event scheduling and monitoring. It also supports a power-fail write-protection mechanism that automatically switches to the battery supply during a power failure and write-protects the memory, ensuring data integrity.

Overall, the Maxim Integrated DS1553P-100 is a robust and comprehensive timekeeping solution that offers unmatched durability and performance for systems that require accurate timekeeping and data retention in the face of power uncertainty.