LM3710 Reset IC / Voltage Supervisor with Power Fail Input, Low Line Output, Manual Reset & Watch Dog Timer | TI.com

LM3710 (ACTIVE)

Reset IC / Voltage Supervisor with Power Fail Input, Low Line Output, Manual Reset & Watch Dog Timer

 

Description

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.

Features

  • 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

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Parametrics

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Part number Order Threshold voltage 1 (Typ) (V) Number of supplies monitored VCC (Max) (V) VCC (Min) (V) Output driver type/reset output Time delay (ms) Features Rating Operating temperature range (C) Watchdog timer WDI (sec)
LM3710 Order now 2.32
3.08
4.63    
2     5.5     1     Active-low
Open-drain
Push-pull    
28
200    
Watchdog timer
PFI/PFO    
Catalog     -40 to 85     0.1
1.6    
LM3704 Order now 2.32
3.08    
2     5.5     1     Active-low
Open-drain
Push-pull    
28
200    
PFI/PFO     Catalog     -40 to 85     None