Description

The MAX690RESA is a microprocessor (µP) supervisory circuit that provides power-supply monitoring and battery-control functions in µP systems. It is designed for use in systems powered by 3.0V or 3.3V supplies and is available in 8-pin DIP and SO packages. It significantly improves system reliability and accuracy compared to separate ICs or discrete components.

Specifications and features

• RESET and RESET Outputs
• Manual Reset Input
• Precision Supply-Voltage Monitor
• 200ms Reset Time Delay
• Watchdog Timer (1.6s timeout)
• Battery-Backup Power Switching—Battery Can Exceed VCCin Normal Operation
• 40µA VCC Supply Current
• 1µA Battery Supply Current
• Voltage Monitor for Power-Fail or Low-Battery Warning
• Guaranteed RESET Assertion to VCC= 1V
• 8-Pin DIP and SO Packages

Application Scenarios

• Battery-Powered Computers and Controllers
• Embedded Controllers
• Intelligent Instruments
• Automotive Systems
• Critical µP Power Monitoring
• Portable Equipment

Comparison

• Reduces the complexity and number of components required for power-supply monitoring and battery-control functions in µP systems
• Significantly improves system reliability and accuracy compared to separate ICs or discrete components
• Voltage monitor for power-fail or low-battery warning
• Available in 8-pin DIP and SO packages
• Guaranteed RESET assertion to VCC= 1V

• Designed for use in systems powered by 3.0V or 3.3V supplies only
• Other similar devices are designed for 5V systems
• Watchdog timer timeout is 1.6s, which may not be suitable for certain applications