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1. DESCRIPTION
The DS1672S-33+ 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.
2. FEATURES
1. 32-Bit Counter
2. I2C Serial Interface
3. Automatic Power-Fail Detect and Switch Circuitry
4. Power-Fail Reset Output
5. Low-Voltage Oscillator Operation (1.3V min)
6. Trickle-Charge Capability
7. Underwriters Laboratories (UL) Recognized
8. -40°C to +85°C Operating Range
3. Pin configuration
4. DC ELECTRICAL CHARACTERISTICS
