DS1683S+

Real Time Clock Overview

The DS1683S+ is a total-elapsed-time and event recorder with an alarm, manufactured by Analog Devices Inc./Maxim Integrated. It features a factory-calibrated, low-temperature-coefficient RC time base, eliminating the need for an external crystal. The device utilizes EEPROM technology to maintain data without a backup power source. It records the number of falling edge transitions on the EVENT pin and the cumulative time the pin is held high. Key specifications include a +2.5V to +5.5V operating voltage range, I2C-compatible interface, and operation within a temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Records total elapsed time (32-bit ETC) with quarter-second resolution and up to 34 years accumulation.
• Nonvolatile 16-bit event counter tracks falling edges on the EVENT pin.
• Integrated calibrated RC oscillator removes requirement for external crystals.
• Includes 16 bytes of user EEPROM and password protection scheme.

Real Time Clock Applications

• High-temp, rugged industrial applications where vibration or shock could damage quartz crystals.
• Systems requiring time-of-use tracking.
• Power-on-time recorders.

Real Time Clock Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status via official documentation. Ensure ordering suffixes match specific package requirements. Check for obsolescence notices as this part may be subject to lifecycle changes. Validate supply chain sources against manufacturer lists.

Real Time Clock Selection Notes

Select the DS1683S+ when crystal-free timing in harsh environments is required. Ensure the application voltage falls between 2.5V and 5.5V. Verify that the I2C bus speed does not exceed 400 kHz. Consider the SOIC-8 package constraints for PCB layout. Evaluate if the nonvolatile memory endurance meets long-term logging needs.

Real Time Clock Part Context

The DS1683 belongs to the DS1683 series of elapsed-time recorders. It is designed for applications needing reliable time and event logging without external oscillators. The S+ suffix typically indicates lead-free and RoHS-compliant packaging variants within the Maxim Integrated product line.

Real Time Clock Replacement Considerations

Check for direct replacements in the DS1682 or DS1683 families. Verify pin compatibility and register map similarities. Confirm electrical characteristics such as voltage range and interface standards match the original design requirements.