Maxim Integrated DS1743P-100+ Nonvolatile Timekeeping RAM

The DS1743P-100+ is a high-performance, 3.3V nonvolatile timekeeping RAM manufactured by Maxim Integrated. This innovative product integrates a full-function, binary-coded decimal (BCD) clock/calendar, 256 bytes of nonvolatile static RAM, a programmable interrupt, a power-fail control circuit, and a lithium energy source into a single monolithic circuit. The integration of these components makes the DS1743P-100+ an ideal solution for applications requiring durable and reliable timekeeping alongside memory retention capabilities, even during power loss.

One of the key features of the DS1743P-100+ is its clock/calendar functionality. It accurately tracks time in seconds, minutes, hours, days, date, months, and years, with the added benefit of leap year compensation up to the year 2100. This makes it particularly useful for time-sensitive applications in data logging, industrial control systems, and other embedded systems that require accurate timekeeping.

The nonvolatile static RAM offers the advantage of data retention without the need for a backup battery. The presence of a lithium energy source within the package ensures that data is preserved and the clock continues to run for a minimum of 10 years in the absence of power. This built-in energy source is a significant benefit, as it reduces the need for external batteries and the associated maintenance costs.

Additionally, the DS1743P-100+ comes with a programmable interrupt function that allows it to provide alarms or timers. This feature can be used to wake up or alert a system at predetermined times, enhancing the functionality of the system it is integrated into. The power-fail control circuit automatically writes-protects the memory when the supply voltage drops below a certain threshold, ensuring data integrity during power fluctuations or outages.

The DS1743P-100+ is available in a 24-pin, 600-mil DIP package, making it easy to integrate into a wide range of applications. Its low-power consumption and wide operating temperature range (-40°C to +85°C) also make it suitable for harsh environments and portable applications where power efficiency is crucial.

In summary, the Maxim Integrated DS1743P-100+ is a versatile and reliable component that combines the functionality of a real-time clock and nonvolatile RAM, offering a comprehensive solution for systems that require persistent timekeeping and data storage in the absence of power.