DS1672

19-6032; Rev 9/11 DS1672 I2C 32-Bit Binary Counter RTC GENERAL DESCRIPTION The DS1672 incorporates a 32-bit counter and power-monitoring functions. The 32-bit counter is designed to count seconds and can be used to derive time-of-day, week, month, month, and year by using a software algorithm. A precision, temperature-compensated reference and comparator circuit monitors the status of VCC. When an out-of-tolerance condition occurs, an internal power-fail signal is generated that forces the reset to the active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for a period of time to allow the power supply and processor to stabilize. TYPICAL OPERATING CIRCUIT FEATURES  32-Bit Counter  I2C Serial Interface  Automatic Power-Fail Detect and Switch Circuitry  Power-Fail Reset Output  Low-Voltage Oscillator Operation (1.3V min)  Trickle-Charge Capability  Underwriters Laboratories (UL) Recognized  -40°C to +85°C Ope...