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MAX807M
电源管理 电路监控、电压监测器及排序器 MAX807M
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MAX807M

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功能完备的微处理器监控电路，提供±1.5%的复位门限精度

可打印的数据手册 订阅

产品详情

请参见参数规范 Battery Backup Circuits

主要特征

请参见参数规范 Battery Backup Circuits
Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 4.0 to 4.5
4.5 to 5.0
Reset Out Active High
Active Low
Push-Pull
ICC (µA) (max) 110
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins PDIP/16
SOIC (W)/16
TSSOP/16
Budgetary
Price (See Notes) 		3.7
请参见参数规范 Battery Backup Circuits
缩小

简化框图

Technical Docs

数据资料 功能完备的微处理器监控电路，提供±1.5%的复位门限精度 Mar 14, 2006

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题，请访问Maxim的 支持中心 。

参量

Parametric specs for Battery Backup Circuits
Reset Thresh. (V) 4.0 to 4.5
4.5 to 5.0
Reset Out Active High
Active Low
Push-Pull
ICC (µA) (max) 110
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins PDIP/16
SOIC (W)/16
TSSOP/16
Budgetary
Price (See Notes) 		3.7
See parametric specs for Battery Backup Circuits

主要特征

  • Precision 4.675V (MAX807L), 4.425V (MAX807M), or 4.575V (MAX807N) Voltage Monitoring
  • 200ms Power-OK/Reset Time Delay
  • RESET-bar and RESET Outputs
  • Independent Watchdog Timer
  • 1µA Standby Current
  • Power Switching
    • 250mA in VCC Mode
    • 20mA in Battery-Backup Mode
  • On-Board Gating of Chip-Enable Signals;
    • 2ns CE Gate Propagation Delay
  • MaxCap® and SuperCap Compatible
  • Voltage Monitor for Power Fail
  • Backup-Battery Monitor
  • Guaranteed active-low RESET Valid to VCC = 1V
  • ±1.5% Low-Line Threshold Accuracy 52mV above Reset Threshold

应用/用途

  • 计算机：台式机、工作站和服务器
  • 控制器
  • 精确的µP监控
  • 智能仪表
  • 便携式电池供电设备

描述

The MAX807 microprocessor (µP) supervisory circuit reduces the complexity and number of components needed to monitor power-supply and battery-control functions in µP systems. A 70µA supply current makes the MAX807 ideal for use in portable equipment, while a 2ns chip-enable propagation delay and 250mA output current capability (20mA in battery-backup mode) make it suitable for larger, higher-performance equipment.

The MAX807 comes in 16-pin DIP, SO, and TSSOP packages, and provides the following functions:
  • µP reset. The active-low RESET output is asserted during power-up, power-down, and brownout conditions, and is guaranteed to be in the correct state for VCC down to 1V.
  • Active-high RESET output.
  • Manual-reset input.
  • Two-stage power-fail warning. A separate low-line comparator compares VCC to a threshold 52mV above the reset threshold. This low-line comparator is more accurate than those in previous µP supervisors.
  • Backup-battery switchover for CMOS RAM, real-time clocks, µPs, or other low-power logic.
  • Write protection of CMOS RAM or EEPROM.
  • 2.275V threshold detector provides for power-fail warning and low-battery detection, or monitors a power supply other than +5V.
  • BATT OK status flag indicates that the backup-battery voltage is above +2.275V.
  • Watchdog-fault output—asserted if the watchdog input has not been toggled within a preset timeout period.

    • 简化框图

    MAX807L、MAX807M、MAX807N：典型工作电路 MAX807L、MAX807M、MAX807N：典型工作电路 Zoom icon

    Technical Docs

    数据资料 功能完备的微处理器监控电路，提供±1.5%的复位门限精度 Mar 14, 2006

    支持和培训

    在Maxim的知识库中搜索技术问题的答案

    过滤搜索

    Maxim的专业工程师团队也会为您解答相应的技术问题，请访问Maxim的 支持中心 。