LM3710 Datasheet, PDF (1/19 Pages) National Semiconductor (TI) – Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output, Manual Reset and Watchdog Timer

LM3710, LM3711
www.ti.com
SNVS150E – NOVEMBER 2000 – REVISED MARCH 2013
LM3710/LM3711 Microprocessor Supervisory Circuits with Power Fail Input, Low Line
Output, Manual Reset and Watchdog Timer
Check for Samples: LM3710, LM3711
FEATURES
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•2 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 V_CC (RESET
Option Only)
• 28 µA V_CC Supply Current
APPLICATIONS
• Embedded Controllers and Processors
• Intelligent Instruments
• Automotive Systems
• Critical µP Power Monitoring
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 V_CC 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 V_CC.
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.
Typical Application
V_IN1
V_IN2
V_CC
PFI
Reset
WDI
PFO
MR
LLO
GND
V_CC
Reset
PP
NMI
bus
INT
GND
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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