MAX807L, MAX807M, MAX807N




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.
  • MAX807L、MAX807M、MAX807N:典型工作电路 MAX807L、MAX807M、MAX807N:典型工作电路 放大+


    • 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


    • 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

    请查看具体的参数规格 Battery Backup Circuits (80)

    Part NumberReset Thresh.
    Reset OutICC
    Oper. Temp.
    maxSee Notes
    4.0 to 4.5
    4.5 to 5.0
    Active High
    Active Low
    -55 to +125
    -40 to +85
    0 to +70
    SOIC (W)/16
    $3.49 @1k

    Pricing Notes:
    产品可靠性报告: MAX807N.pdf 
    申请可靠性报告: MAX807L  MAX807M 
    型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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