Maxim Integrated DS1644+120 Nonvolatile Timekeeping RAM

The DS1644+120 is a robust nonvolatile timekeeping RAM module from Maxim Integrated that combines a full-featured real-time clock (RTC) and 32K x 8 nonvolatile static RAM in one integrated package. This innovative product is designed to provide a reliable and long-lasting solution for data storage and precise timekeeping, even when the main power is off. Its integration of memory and timekeeping components makes it an ideal choice for a wide range of applications, including industrial control systems, utility meters, and medical devices.

The DS1644+120 operates with a voltage range of 4.5 to 5.5 volts and features an embedded lithium energy source and a quartz crystal, which ensures that the timekeeping and RAM functions continue to operate for over 10 years in the absence of external power. The device adheres to standard JEDEC single-in-line memory module (SIMM) configurations, which facilitates easy installation and replacement in systems designed for memory expansion.

Key features of the DS1644+120 include:

• Integrated 32K x 8 static RAM and real-time clock
• Long-life, self-contained battery and crystal in the encapsulated package
• Full clock functionality with hour, minute, second, day, date, month, and year information
• Automatic leap year compensation valid up to the year 2100
• 114 bytes of user-accessible nonvolatile memory for control and status
• Programmable alarm and interrupt function
• UL recognized

The RTC of the DS1644+120 provides seconds, minutes, hours, day, date, month, and year information, with automatic adjustments for months with fewer than 31 days, including corrections for leap year. It also offers a programmable alarm and interrupt function, which can be set to trigger on a specific date, day of the week, or after a designated time interval, providing versatility for event management and scheduling tasks.

Overall, the DS1644+120 from Maxim Integrated is a highly reliable and convenient solution for systems that require nonvolatile memory and precise timekeeping. Its ease of integration, coupled with its long-term durability, makes it a top choice for system designers looking for a dependable timekeeping and data storage solution.