MAX690SCSA Microprocessor Supervisory Circuit

The MAX690SCSA from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides maximum protection for your system by ensuring that the µP starts up in a known state and by monitoring its operation. This supervisory circuit is an essential component for any system that requires a high level of reliability and precision.

Key Features

• Power Supply Monitoring: The device keeps a constant check on the power supply voltage and ensures that the system operates within the acceptable range.
• Reset Output: It generates a reset signal whenever the VCC supply voltage falls below a preset threshold, keeping the µP within safe operating conditions.
• Low Power Consumption: Designed for energy efficiency, the MAX690SCSA consumes minimal power, making it suitable for battery-operated systems.
• Backup Battery Switchover: In the event of a power failure, the device automatically switches to a backup battery without any interruption.
• Debounced Manual Reset Input: This feature allows for a manual reset, ensuring that the system can be reliably reset with an external button.
• Watchdog Timer: An integrated watchdog timer prevents system failures due to software lock-up, enhancing the overall system reliability.

Applications

The MAX690SCSA is widely used in a variety of applications where system integrity is critical. These include:

• Computers and Servers
• Embedded Systems
• Industrial Control Systems
• Portable/Battery-Powered Equipment

Technical Specifications

The MAX690SCSA operates over a wide supply voltage range and is available in a compact 8-pin SO package. Its key specifications include:

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature: -40°C to +85°C
• Reset Threshold Voltage: Typically 4.65V
• Package Type: 8-Pin SOIC

With its robust feature set, the MAX690SCSA supervisory circuit from Maxim Integrated is an excellent choice for ensuring the stable and reliable operation of your microprocessor-based systems.