WMSIC Electronic Components

GR MAX809R

ModelMAX809R
PackageSOT-23
BrandGR
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
GR MAX809R
Type
GR
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
GR
Electronic Component
MAX809R
Electronic Component
1
Package
SOT-23
Electronic Component
Supervisorand positions IC
Electronic Component
0.037g
Electronic Component
1
Electronic Component
BM0264390952
Reset
500ms
Operating Temperature
40℃~+85℃
Operating Voltage
1V~6V
ICType
Voltage Detector
Output Type
Electronic Component
Voltage
2.63V
Static Current(Iq)
2uA

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

MAX809R 微处理器电压检测器产品概述

一、产品定位与核心价值

MAX809R是一款专为微处理器(MCU)、微控制器(MPU) 设计的低功耗电压检测器,核心作用是实现上电复位(POR) 和掉电复位(BOD) ——在系统上电时确保MCU稳定启动,在电源电压跌落时及时拉低复位电平,防止MCU因电压不足出现误操作或程序跑飞。其宽电压范围、低静态电流与工业级温度适应性,使其成为便携式设备、工业控制、消费电子等领域的常用复位方案。

二、核心电气参数详解

MAX809R的关键参数精准匹配低功耗系统需求,具体如下:

参数项 典型值/范围 实际应用说明 工作电压范围 1V ~ 6V 覆盖3.3V、5V等常见MCU供电,适配低功耗(1V起)与标准电压系统 复位阈值电压 2.63V(±1%精度) 精准监控电源,确保电压低于阈值时触发复位,避免MCU在临界电压下运行 输出类型 推挽输出 无需上拉电阻,直接驱动MCU复位引脚,简化电路设计 复位有效电平 低电平有效 兼容大多数MCU的复位逻辑(复位时拉低,稳定后拉高) 复位超时时间 500ms(典型值) 足够MCU完成寄存器初始化、程序加载,避免上电初期误运行 静态电流(Iq) 2μA(典型值) 极低功耗,并联在电源端不增加系统负担,适合电池供电场景 受监控通道 1通道 单电源监控,满足单MCU系统的复位需求

三、关键功能特性

3.1 上电复位(POR)

系统上电时,电源电压从0逐渐上升:

  • 当VDD < 2.63V时,RESET引脚输出低电平(有效),强制MCU处于复位状态;
  • 当VDD ≥ 2.63V且稳定后,内部延时电路启动,500ms后输出高电平(无效),MCU开始正常运行。
    该过程确保MCU在上电初期电压不稳定时不会误执行程序,避免系统故障。

3.2 掉电复位(BOD)

当电源电压因负载变化、电池耗尽跌落至2.63V以下时:

  • RESET引脚立即输出低电平,强制MCU停止运行,防止寄存器数据错误、程序跑飞;
  • 仅当电源回升至阈值以上并稳定后,才会再次延时输出高电平,恢复MCU工作。

3.3 低功耗与宽温适应性

  • 低功耗:2μA静态电流让其可直接并联在纽扣电池、锂电池系统上,长期待机不缩短电池寿命;
  • 宽温度范围:工作温度覆盖**-40℃ ~ +85℃**,满足工业现场(户外传感器、PLC)、车载辅助电子(蓝牙适配器)等 harsh 环境需求。

3.4 小封装与易用性

采用SOT-23-3封装(3引脚),引脚定义清晰:

  • 引脚1:VDD(电源输入);
  • 引脚2:GND(地);
  • 引脚3:RESET(复位输出)。
    无需额外外围元件(电阻、电容),直接焊接即可使用,大幅节省PCB空间与设计成本。

四、典型应用场景

MAX809R的特性使其适用于以下场景:

  1. 便携式低功耗设备:智能手环、BLE模块、无线传感器节点——低功耗延长电池寿命,宽电压适配1V~3.3V供电;
  2. 工业控制单元:PLC模块、工业传感器、电机控制器——工业级温度范围满足现场环境,复位功能保障系统稳定;
  3. 消费电子:智能家居(智能插座、温控器)、小型家电(智能台灯)——简化电路,降低成本;
  4. 汽车辅助电子:车载蓝牙、胎压监测(TPMS)——宽温与抗干扰性适配车载环境。

五、可靠性与品质保障

MAX809R符合工业级标准,具备:

  • ESD防护:HBM(人体模型)≥2kV,避免生产组装时静电损坏;
  • 过压耐受:可承受短暂10V脉冲,提升系统抗干扰能力;
  • 长期稳定:阈值电压精度±1%,静态电流稳定,确保长期使用中复位功能可靠。

综上,MAX809R以低功耗、宽适配、高可靠的特点,成为MCU系统复位设计的经典选择,尤其适合对功耗和空间敏感的应用场景。

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