Maxim Integrated DS1501WN Real-Time Clock

The DS1501WN from Maxim Integrated is a full-featured, Y2K-compliant real-time clock/calendar (RTC) with an integrated watchdog timer and a high-precision temperature-compensated crystal oscillator. This RTC is designed to provide a reliable timekeeping solution for a wide range of data-logging and time-sensitive applications within the computing, industrial, telecommunications, and consumer electronics markets.

Encased in a robust 28-pin Wide SOIC package, the DS1501WN is not only durable but also offers a compact footprint suitable for space-constrained designs. It operates over a wide voltage range of 4.5V to 5.5V and includes a long-life, rechargeable energy source that can maintain timekeeping and device configuration for up to 10 years in the absence of external power.

One of the standout features of the DS1501WN is its integrated watchdog timer, which can be programmed to reset an unresponsive system, thereby enhancing overall system reliability. The device also includes an alarm function, which can be set to trigger at specific times, and a programmable square wave output, enabling it to serve additional timing functions within a system.

The device's memory includes a serial real-time clock with 256 bytes of battery-backed NV SRAM, which allows for the storage of critical data that must be preserved during power loss events. The DS1501WN is fully accessible through a simple multiplexed byte-wide interface, making it easy to integrate and program within a variety of systems.

Additionally, the DS1501WN's temperature-compensated crystal oscillator ensures high accuracy timekeeping, compensating for the natural frequency drift that occurs in crystal oscillators due to temperature changes. This feature is particularly important for applications that require precise timekeeping over a range of environmental conditions.

Overall, the DS1501WN from Maxim Integrated provides a comprehensive solution for systems requiring an accurate, reliable, and feature-rich real-time clock. Its combination of durability, precision, and extended power-fail support makes it an ideal choice for mission-critical applications where time is of the essence.