GND

GND

NMI

PFI

MR

PP

PFO

INT

LLO

Reset

Reset

bus

WDI

LM3710, LM3711

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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

1

FEATURES

DESCRIPTION

The

LM3710/LM3711

series

of

microprocessor

2

•

Standard Reset Threshold Voltage: 3.08V

supervisory circuits provide the maximum flexibility for

•

Custom Reset Threshold Voltages: For other

monitoring power supplies and battery controlled

voltages between 2.2V and 5.0V in 10mV

functions in systems without backup batteries. The

increments, contact TI

LM3710/LM3711 series are available in VSSOP-10

and 9-bump DSBGA packages.

•

No External Components Required

•

Manual-Reset Input

Built-in features include the following:

•

RESET (LM3710) or RESET (LM3711) Outputs

Reset: Reset is asserted during power-up, power-

•

Precision Supply Voltage Monitor

down, and brownout conditions. RESET is ensured

•

Factory Programmable Reset and Watchdog

Timeout Delays

Manual Reset Input: An input that asserts reset when

pulled low.

•

Separate Power Fail Comparator

•

Available in DSBGA Package for Minimum

Power-Fail Input: A 1.225V threshold detector for

Footprint

power fail warning, or to monitor a power supply other

•

±0.5% Reset Threshold Accuracy at Room

Temperature

Low Line Output: This early power failure warning

indicator goes low when the supply voltage drops to a

•

±2% Reset Threshold Accuracy Over

value which is 2% higher than the reset threshold

Temperature Extremes

voltage.

•

Watchdog

Timer:

The

WDI

(Watchdog

Input)

Option Only)

monitors one of the µP's output lines for activity. If no

•

output transition occurs during the watchdog timeout

period, reset is activated.

APPLICATIONS

•

Embedded Controllers and Processors

•

Intelligent Instruments

•

Automotive Systems

•

Critical µP Power Monitoring

Typical Application

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.