LM3704 datasheet(1/17 Pages) NSC

Numer części	LM3704

Szczegółowy opis	Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and Manual Reset

PDF	17 Pages

Scroll/Zoom	100%

Producent	NSC [National Semiconductor (TI)]

Strona internetowa	http://www.national.com

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LM3704/LM3705

Microprocessor Supervisory Circuits with Power Fail

Input, Low Line Output and Manual Reset

General Description

The LM3704/LM3705 series of microprocessor supervisory

circuits provide the maximum flexibility for monitoring power

supplies and battery controlled functions in systems without

backup batteries. The LM3704/LM3705 series are available

in MSOP-10 and 9-bump micro SMD packages.

Built-in features include the following:

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

brownout conditions. RESET is guaranteed 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.

Features

n

Standard Reset Threshold voltage: 3.08V

n

Custom Reset Threshold voltages: For other voltages

between 2.2V and 5.0V in 10mV increments, contact

National Semiconductor Corp.

n

No external components required

n

Manual-Reset input

n

RESET (LM3704) or RESET (LM3705) outputs

n

Precision supply voltage monitor

n

Factory programmable Reset Timeout Delay

n

Separate Power Fail comparator

n

Available in micro SMD package for minimum footprint

n ±

0.5% Reset threshold accuracy at room temperature

n ±

2% Reset threshold accuracy over temperature

extremes

n

Reset assertion down to 1V V

CC (RESET option only)

n

28 µA V

CC supply current

Applications

n

Embedded Controllers and Processors

n

Intelligent Instruments

n

Automotive Systems

n

Critical µP Power Monitoring

Typical Application

10136903

July 2002

DS101369

www.national.com

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LM3704 Arkusz danych(PDF) 1 Page - National Semiconductor (TI)

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