DS1682S+

The DS1682S+ from Dallas Semiconductor is an integrated elapsed-time recorder designed for applications where monitoring operational time and usage counts is critical. It utilizes a factory-calibrated, temperature-compensated RC time base, eliminating the need for an external crystal and providing accuracy to 2% typical. The device records the total active time of an event input and the number of events that have occurred, storing this data in nonvolatile EEPROM memory, thus requiring no backup power source.

Key features include a 32-bit nonvolatile elapsed time counter with quarter-second resolution, capable of accumulating up to 34 years of data. It also includes a 17-bit nonvolatile event counter and a programmable elapsed time alarm output. The DS1682S+ operates over a wide 2.5V to 5.5V power-supply range and has an operating temperature range of -40°C to +85°C, making it suitable for high-temperature and rugged industrial environments. Communication is handled via a 2-wire serial interface.

This elapsed-time recorder is ideal for applications such as time-of-use warranty tracking, calibration monitoring, repair logs, and general maintenance scheduling. Its robust design and nonvolatile data retention ensure reliable performance in demanding conditions where vibration or shock might affect traditional crystal-based timing circuits.