Datasheet > LM810M3-2.93/NOPB

LM810M3-2.93/NOPB

更新时间： 2023-07-15 00:00:00

品牌	Logo	应用领域
美国国家半导体 - NSC		光电二极管
页数	文件大小	规格书
9页	214K
描述
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, SOT-23, 3 PIN

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September 2002

LM809/LM810

3-Pin Microprocessor Reset Circuits

General Description

Features

n Precise monitoring of 3V, 3.3V, and 5V supply voltages

n Superior upgrade to MAX809/810

The LM809/810 microprocessor supervisory circuits can be

used to monitor the power supplies in microprocessor and

digital systems. They provide a reset to the microprocessor

during power-up, power-down and brown-out conditions.

n Fully specified over temperature

n 140ms min. Power-On Reset pulse width, 240ms typical

Active-low RESET Output (LM809)

Active-high RESET Output (LM810)

n Guaranteed RESET Output valid for V_CC≥1V

n Low Supply Current, 15µA typ.

The function of the LM809/810 is to monitor the V_CCsupply

voltage, and assert a reset signal whenever this voltage

declines below the factory-programmed reset threshold. The

reset signal remains asserted for 240ms after V_CCrises

above the threshold. The LM809 has an active-low RESET

output, while the LM810 has an active-high RESET output.

n Power supply transient immunity

Seven standard reset voltage options are available, suitable

for monitoring 5V, 3.3V, and 3V supply voltages.

Applications

n Microprocessor Systems

n Computers

With a low supply current of only 15µA, the LM809/810 are

ideal for use in portable equipment. The LM809/LM810 are

available in the 3-pin SOT23 package and in the 6-Lead LLP

package.

n Controllers

n Intelligent Instruments

n Portable/Battery-Powered Equipment

n Automotive

Typical Application Circuit

10105701

Connection Diagrams

10105702

( ) are for LM810

10105715

Top View

See NS package Number LDB06A

( ) are for LM810

DS101057

www.national.com

123 4 5 6 7...9

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