Datasheet > MCP810M3-3.08

MCP810M3-3.08

更新时间： 2024-11-24 22:07:51

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美国国家半导体 - NSC		微处理器复位电路
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描述
3-Pin Microprocessor Reset Circuits

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MCP810M3-3.08 数据手册

June 2001

MCP809/MCP810

3-Pin Microprocessor Reset Circuits

General Description

Features

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

n Fully specified over temperature

The MCP809/810 microprocessor supervisory circuits can

be used to monitor the power supplies in microprocessor

and digital systems. They provide a reset to the micropro-

cessor during power-up, power-down and brown-out condi-

tions.

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

Active-low RESET Output (MCP809)

Active-high RESET Output (MCP810)

The function of the MCP809/810 is to monitor the V_CC

supply 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 MCP809 has an

active-low RESET output, while the MCP810 has an

active-high RESET output.

n Guaranteed RESET Output valid for V_CC≥1V

n Low Supply Current, 15µA typ.

n Power supply transient immunity

Applications

n Microprocessor Systems

n Computers

Seven standard reset voltage options are available, suitable

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

n Controllers

n Intelligent Instruments

n Portable/Battery-Powered Equipment

n Automotive

With a low supply current of only 15µA, the MCP809/810 are

ideal for use in portable equipment. The MCP809/MCP810

are available in the 3-pin SOT23 package.

Typical Application Circuit

Connection Diagram

20022302

( ) are for MCP810

20022301

DS200223

www.national.com

12 3 4 5 6 7

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