DS1678+

Real Time Clock Overview

The DS1678+ is a real-time clock and event recorder manufactured by Analog Devices Inc./Maxim Integrated. It features an I2C serial interface, operates within a 4.5V to 5.5V supply range, and supports industrial temperatures from -40°C to +85°C. The device logs up to 1025 events in battery-backed memory using a 16-bit elapsed time counter with selectable resolution (seconds, minutes, or hours). It includes a 32-byte general-purpose NV RAM, programmable alarm, and leap year compensation.

Real Time Clock Feature Summary

• Logs up to 1025 consecutive asynchronous events in read-only battery-backed memory
• I2C serial interface for communication and control
• 32-byte battery-backed general-purpose non-volatile RAM
• Programmable event trigger via INT pin rising/falling edges

Real Time Clock Applications

• Industrial systems requiring non-periodic event timestamping
• Portable system controllers needing low-power RTC backup
• Data logging applications with limited power availability

Real Time Clock Procurement Notes

Verify the specific package variant required, as the base model number covers multiple form factors including Plastic DIP and SO-8. Confirm RoHS compliance status through official documentation, as the '+' suffix indicates lead-free construction. Check current distribution channels for availability, as stock levels fluctuate.

Real Time Clock Selection Notes

Select the appropriate package based on board space constraints: Plastic DIP for through-hole or SO-8 for surface mount. Ensure the external crystal meets the 12.5pF load capacitance specification for optimal accuracy. Verify that the system voltage remains within the 4.5V to 5.5V range during operation.

Real Time Clock Part Context

This component belongs to the DS1678 series of real-time clocks. It is part of Maxim Integrated's portfolio of timing devices designed for precise timekeeping and event recording in embedded systems. The series offers various packaging options to suit different manufacturing requirements.

Real Time Clock Replacement Considerations

Direct substitutes include other Maxim Integrated RTCs with I2C interfaces and similar memory capacities, such as the DS1307 or DS3231, though feature sets like event logging may differ. Verify pin compatibility and register mapping before substitution.