MAX818L中文资料+5V微处理器监控电路数据手册ADI规格书

描述 Description

The MAX817/MAX818/MAX819 microprocessor (µP) supervisory circuits simplify power-supply monitoring, battery control, and chip-enable gating in µP systems by reducing the number of components required. These devices are designed for use in +5V-powered systems. Low supply current (11µA typical) and small package size make these devices ideal for portable applications. The MAX817/MAX818/MAX819 are specifically designed to ignore fast transients on VCC. Other supervisory functions include active-low reset, backup-battery switchover, watchdog input, battery freshness seal, and chip-enable gating. The Selector Guide in the full data sheet lists the specific functions available from each device.
These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.65V for the L versions and 4.40V for the M versions. The MAX817/ MAX818/MAX819 are available in space-saving µMAX® packages, as well as 8-pin DIP/SO.

特性 Features

• Precision Supply-Voltage Monitor:
• 4.65V (MAX81_L)
• 4.40V (MAX81_M)
• 11µA Quiescent Supply Current
• 200ms Reset Time Delay
• Watchdog Timer with 1.6sec Timeout (MAX817/MAX818)
• Battery-Backup Power Switching; Battery Voltage Can Exceed VCC
• Battery Freshness Seal
• On-Board, 3ns Gating of Chip-Enable Signals (MAX818)
• Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning (MAX817/MAX819)
• Manual Reset Input (MAX819)

应用 Application

• 电池供电计算机/控制器
• 精确的µP监控
• 嵌入式控制器
• 智能仪表
• 便携式设备

简介

MAX818L属于集成电路（IC）的监控器。由制造生产的MAX818L监控器PMIC 监控器用于监视和/或控制电路中的电压轨，能够连接微控制器以维持一定的功率限值。监控器类型包括电池备用电路、监控器、多电压监控器、电源监控器、稳压器/监控器、复位计时器、定序器、简单复位/上电复位、智能开/关控制器、系统管理器、电压检测器和看门狗电路。