MAX690MJA

Enhance the performance of your microprocessor system with the MAX690MJA supervisory circuit. This sophisticated IC brings together essential functions such as µP reset, backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning in a compact and efficient package. By incorporating these features into a single device, the MAX690 family simplifies circuit design, minimizes component requirements, and boosts system reliability and accuracy. Whether you're developing a cutting-edge technology product or a reliable industrial application, the MAX690MJA offers a flexible and cost-effective solution for power supply monitoring and battery control functions

Key Features

• Supervisory Function Integration Saves Board Space while Fully Protecting Microprocessor-Based Systems
  • Precision Voltage Monitor
    • 4.65V (MAX690, MAX691, MAX694, MAX695)
    • 4.40V (MAX692, MAX693)
  • Power OK/Reset Time Delay
    • 50ms, 200ms, or Adjustable
  • Watchdog Timer
    • 100ms, 1.6s, or Adjustable
  • Battery Backup Power Switching
  • Voltage Monitor for Power Fail or Low Battery Warning
  • Minimum External Component Count
• Low Power Consumption in Battery Backup Mode Extends Battery Life
  • 1µA Standby Current
• Onboard Gating of Chip Enable Signals Protects Against Erroneous Data Written to RAM During Low V_CC Events

Application

• A reset output during power-up, power-down, and brownout conditions.
• Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic.
• A Reset pulse if the optional watchdog timer has not been toggled within a specified time.
• A 1.3V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5V.