DS1672-3+

Real Time Clock Overview

The DS1672-3+ is a real-time clock IC incorporating a 32-bit binary counter and power-monitoring functions. It operates on an I2C serial interface with a recommended supply voltage of 3.0V (range 2.7V to 5.5V). The device counts seconds and derives time-of-day, week, month, and year via software algorithms. It features automatic power-fail detection, switching to a backup supply when VCC drops below the trip point. The unit supports standard and fast mode I2C communication and includes a programmable trickle charger for battery or supercapacitor maintenance.

Real Time Clock Feature Summary

• 32-bit binary counter accessible via I2C serial interface
• Automatic power-fail detect and switch circuitry with reset output
• Low-voltage oscillator operation starting at 1.3V minimum
• Programmable trickle charger for battery or supercapacitor charging

Real Time Clock Applications

• Portable systems requiring precise timekeeping
• Embedded devices needing low-power real-time clocks
• Systems utilizing I2C bus architecture for data logging

Real Time Clock Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status as indicated by the '+' suffix. Check lead-free certification documents against current environmental regulations. Ensure storage conditions remain within specified limits to maintain reliability.

Real Time Clock Selection Notes

Select this variant for 3.0V nominal supply applications. Ensure external crystal matches 32.768kHz frequency with 6pF load capacitance. Verify I2C bus speed compatibility with master controller. Consider thermal dissipation requirements based on package type and ambient temperature.

Real Time Clock Part Context

Part of the DS1672 family including variants for 2.0V and 3.3V supplies. Available in PDIP, SO, and µSOP packages. The '3' suffix denotes the 3.0V operating range. Lead-free versions carry the '+' designation. Reel options exist for surface-mount variants.

Real Time Clock Replacement Considerations

DS1672-2+ offers identical functionality with 2.0V supply range. DS1672-33+ provides 3.3V supply compatibility. Surface-mount equivalents include DS1672S-3+ and DS1672U-3+. Verify pinout and register compatibility before substitution.