DS1672S-33+

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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