MAX791:微处理器监控电路

功能完备的µP监控电路

The MAX791 microprocessor (µP) supervisory circuit reduces the complexity and number of components needed to monitor power-supply and battery-control functions in µP systems. The 50µA supply current makes the MAX791 ideal for use in portable equipment, while the 6ns chip-enable propagation delay and 250mA output capability (25mA in battery-backup mode) make it suitable for larger, higher-performance equipment. The MAX791 comes in 16-pin DIP and narrow SO packages and provides the following functions: µP reset-RESET-bar 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, even with no battery in the circuit. Manual-reset input. A 1.25V threshold detector provides for power-fail warning and low-battery detection, or monitors a power supply other than +5V. Two-stage power-fail warning-a separate low-line comparator compares VCC to a threshold 150mV above the reset threshold. Backup-battery switchover for CMOS RAM, real-time clocks, µPs, or other low-power logic. Software monitoring of backup-battery voltage. A watchdog-fault output is asserted if the watchdog input has not been toggled within either a preset or an adjustable timeout period. Write protection of CMOS RAM or EEPROM. Pulsed watchdog output, to give advance warning of impending WDO-bar assertion caused by watchdog timeout.

关键特性
  • Precision 4.65V Voltage Monitoring
  • 200ms Power-OK/Reset Time Delay
  • Independent Watchdog Timer-Preset or Adjustable
  • 1µA Standby Current
  • Power Switching
    • 250mA Output in VCC Mode
    • 25mA Output in Battery-Backup Mode
  • On-Board Gating of Chip-Enable Signals
    • Memory Write-Cycle Completion
    • 6ns CE Gate Propagation Delay
  • MaxCap™ or SuperCap™ Compatible
  • Voltage Monitor for Power-Fail or Low-Battery Warning
  • Backup-Battery Monitor
  • Guaranteed RESET-bar Valid to VCC = 1V
MAX791:典型工作电路
MAX791:典型工作电路
应用
  • 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
数据手册DataSheet
语言下载文件备注
英文MAX791.pdfRev 7; 03/2006
关键参数
Part NumberReset Thresh.
(V)
Reset OutICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX7913.3 to 5.5
  • Active Low
  • Push-Pull
150
  • -55 to +125
  • -40 to +85
  • 0 to +70
  • CDIP(N)/16
  • PDIP(N)/16
  • SOIC(N)/16
  • TSSOP/16
$5.27 @1k
质量和环境数据
相关产品
  • MAX800:微处理器监控电路
  • MAX794:3.0V/3.3V可调、微处理器监控电路
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX791C/D停止供货DICE SALES,;NA引脚;DICE;0°C至+70°C参考数据资料
MAX791CPE停止供货MAX791CPE+PDIP(N),;16引脚;158.4mm²0°C至+70°CRoHS/无铅:否
MAX791CPE+生产中PDIP(N),;16引脚;158.4mm²0°C至+70°CRoHS/无铅:无铅
MAX791CSE停止供货MAX791CSE+SOIC(N),;16引脚;62mm²0°C至+70°CRoHS/无铅:否
MAX791CSE+生产中SOIC(N),;16引脚;62mm²0°C至+70°CRoHS/无铅:无铅
MAX791CSE+T生产中SOIC(N),;16引脚;62mm²0°C至+70°CRoHS/无铅:无铅
MAX791CSE-T停止供货MAX791CSE+TSOIC(N),;16引脚;62mm²0°C至+70°CRoHS/无铅:否
MAX791CUE停止供货MAX791CUE+TSSOP,;16引脚;33.4mm²0°C至+70°CRoHS/无铅:否
MAX791CUE+生产中TSSOP,;16引脚;33.4mm²0°C至+70°CRoHS/无铅:无铅
MAX791CUE+T生产中TSSOP,;16引脚;33.4mm²0°C至+70°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX791CUE-T停止供货MAX791CUE+TTSSOP;16引脚0°C至+70°C参考数据资料
MAX791EJE停止供货CDIP(N),;16引脚;173.5mm²-40°C至+85°CRoHS/无铅:否
MAX791EPE停止供货MAX791EPE+PDIP(N),;16引脚;158.4mm²-40°C至+85°CRoHS/无铅:否
MAX791EPE+生产中PDIP(N),;16引脚;158.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX791ESE停止供货MAX791ESE+SOIC(N),;16引脚;62mm²-40°C至+85°CRoHS/无铅:否
MAX791ESE+生产中SOIC(N),;16引脚;62mm²-40°C至+85°CRoHS/无铅:无铅
MAX791ESE+T生产中SOIC(N),;16引脚;62mm²-40°C至+85°CRoHS/无铅:无铅
MAX791ESE-T停止供货MAX791ESE+TSOIC(N),;16引脚;62mm²-40°C至+85°CRoHS/无铅:否
MAX791EUE停止供货MAX791EUE+TSSOP,;16引脚;33.4mm²-40°C至+85°CRoHS/无铅:否
MAX791EUE+生产中TSSOP,;16引脚;33.4mm²-40°C至+85°CRoHS/无铅:无铅
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX791EUE+T生产中TSSOP;-40°C至+85°C参考数据资料
MAX791EUE-T停止供货MAX791EUE+TTSSOP;16引脚-40°C至+85°C参考数据资料
MAX791MJE生产中CDIP(N),;16引脚;173.5mm²-55°C至+125°CRoHS/无铅:否
MAX791.pdf MAX791
MAX791.pdf MAX791
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MAX791.pdf MAX791
MAX791.pdf MAX791