The LM3710/LM3711 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries. The LM3710/LM3711 series are available in VSSOP-10 and 9-bump DSBGA packages.

Built-in features include the following:

Reset: Reset is asserted during power-up, power-down, and brownout conditions. RESET is ensured down to VCC of 1.0V.

Manual Reset Input: An input that asserts reset when pulled low.

Power-Fail Input: A 1.225V threshold detector for power fail warning, or to monitor a power supply other than VCC.

Low Line Output: This early power failure warning indicator goes low when the supply voltage drops to a value which is 2% higher than the reset threshold voltage.

Watchdog Timer: The WDI (Watchdog Input) monitors one of the µP's output lines for activity. If no output transition occurs during the watchdog timeout period, reset is activated.

• Standard Reset Threshold Voltage: 3.08V
• Custom Reset Threshold Voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contact TI
• No External Components Required
• Manual-Reset Input
• RESET (LM3710) or RESET (LM3711) Outputs
• Precision Supply Voltage Monitor
• Factory Programmable Reset and Watchdog Timeout Delays
• Separate Power Fail Comparator
• Available in DSBGA Package for Minimum Footprint
• ±0.5% Reset Threshold Accuracy at Room Temperature
• ±2% Reset Threshold Accuracy Over Temperature Extremes
• Reset Assertion Down to 1V VCC (RESET Option Only)
• 28 µA VCC Supply Current