Maxim Integrated MAX706PCSA Microprocessor Supervisory Circuit

The MAX706PCSA from Maxim Integrated is a highly efficient microprocessor (µP) supervisory circuit designed to monitor the power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V-powered circuits.

This supervisory circuit offers a combination of features that make it ideal for controlling µP systems, including a precision voltage monitor, watchdog timer, and a manual reset capability. The MAX706PCSA ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. It is particularly useful in situations where the system needs to be brought back to a non-volatile, known state after a power failure or upon command.

Key Features:

• Reset Output: The device provides a reset signal to the µP during power-up, power-down, and brown-out conditions. This reset output remains operational with VCC as low as 1V.
• Watchdog Timer: A watchdog timer is built-in to ensure that the µP does not hang in an uncontrolled state. If the µP fails to strobe the watchdog within a preset timeout period, the MAX706PCSA will issue a system reset.
• Manual Reset: An additional feature is the manual reset input that allows for an external trigger to initiate a system reset.
• Power Supply Monitoring: The device monitors the power supply voltage and maintains system integrity by providing a reset to the µP whenever the monitored voltage drops below a preset threshold.

Applications:

The MAX706PCSA is versatile, finding applications in a variety of systems, including:

• Computers and Controllers
• Intelligent Instruments
• Portable/Battery-Powered Equipment
• Embedded Systems

With its compact 8-pin SOIC package, the MAX706PCSA is suitable for space-constrained applications. Its temperature range of 0°C to +70°C allows it to operate reliably in most standard environments. By integrating this supervisory circuit into your design, you can enhance the reliability and performance of your microprocessor-based systems.

Maxim Integrated's commitment to quality and innovation is evident in the MAX706PCSA, making it a smart choice for designers looking for a robust µP supervisory solution.