DS1683S+T&R

Real Time Clock Overview

The DS1683S+T&R 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 or backup power source. The device utilizes EEPROM technology to maintain data without a backup battery. It monitors the EVENT pin to record the number of falling edge transitions and the cumulative time the pin is held high. Key specifications include a supply voltage range of +2.5V to +5.5V, an operating temperature range of -40°C to +85°C, and an I2C-compatible interface.

Real Time Clock Feature Summary

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

Real Time Clock Applications

• High-temperature, rugged industrial applications where vibration or shock could damage quartz crystals.
• Systems requiring tracking of time-of-use for maintenance or calibration schedules.
• Power-on-time recorders for monitoring device operational history.

Real Time Clock Procurement Notes

Verify the T&R suffix indicates tape-and-reel packaging when sourcing this specific variant. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering part number matches the exact package and revision requirements for your design.

Real Time Clock Selection Notes

Select the DS1683S+T&R for applications needing elapsed time and event counting without external timing components. The I2C interface requires pull-up resistors on SDA and SCL lines. Consider the 2.5V to 5.5V supply range compatibility with your system logic levels. The SOIC-8 package is suitable for surface-mount assembly.

Real Time Clock Part Context

The DS1683 belongs to the Maxim Integrated elapsed-time recorder family. It is designed as a drop-in solution for systems previously using quartz-based RTCs in harsh environments. The nonvolatile nature of its counters makes it distinct from standard real-time clocks that require continuous power or batteries to maintain timekeeping.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence regarding register maps and timing characteristics if considering alternative elapsed-time recorders.

Real Time Clock FAQ

Does the DS1683 require a backup battery?

No, the DS1683 uses EEPROM technology to maintain data in the absence of power, eliminating the need for a backup power source.

What is the resolution of the Elapsed Time Counter?

The 32-bit Elapsed Time Counter (ETC) provides quarter-second (250ms) resolution.

How is the ALARM pin configured?

The ALARM pin is an open-drain structure. Its polarity (active low or high impedance) is programmable via the ALRM POL bit in the Configuration register.