Description

The MAX693EPE+ is a part of the MAX690 family, which consists of supervisory circuits utilized in microprocessor systems to reduce the complexity and number of components required for power supply monitoring and battery control functions. These supervisory functions include µP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. Compared to separate ICs or discrete components, the MAX690 family can significantly enhance system reliability and accuracy.

Specifications and 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 VCC Events

Application Scenarios

The MAX693EPE+ is ideal for use in the following:

• Computers
• Controllers
• Intelligent Instruments
• Automotive Systems
• Critical µP Power Monitoring

Comparison

• Integration of supervisory functions saves board space
• Enhanced system reliability and accuracy
• Precision voltage monitor with various voltage options
• Low power consumption in battery backup mode extends battery life
• Onboard gating of chip enable signals protects against erroneous data written to RAM during low VCC events

• Not suitable for applications requiring a voltage monitor below 4.40V or above 4.65V
• Requires some external components