The MAX814KCPA+ from Maxim Integrated is a sophisticated microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in conjunction with +5V-powered µPs.

Key Features

• Precision Monitoring: The device features a precision voltage monitor that keeps a vigilant eye on the +5V power supply, ensuring that the system operates within the acceptable voltage range.
• Power-On Reset: An internal power-on reset feature ensures that the µP logic starts in a known state by holding the reset output active for a minimum of 140ms after the supply voltage reaches its threshold level.
• Manual Reset: A manual reset input allows for a very low input current, which can be activated with a momentary closure to ground to initiate a system reset, offering a convenient way to reset the system without cycling the power.
• Watchdog Timer: An integrated watchdog timer with a 1.6s timeout (min) helps to ensure that the µP system functions as expected by monitoring the µP activity and initiating a system reset if necessary.
• Voltage Monitor Output: The device includes an active-low RESET output, which can be used to reset external devices during a power fault condition.

Applications

The MAX814KCPA+ is suitable for a wide range of applications including:

• Computers
• Controllers
• Intelligent Instruments
• Portable/Battery-Powered Equipment
• Critical µP and µC Power Monitoring

Package and Quality

The MAX814KCPA+ comes in an 8-pin PDIP package, offering a compact solution for PCB layouts. Maxim Integrated is known for its commitment to quality, and this product is no exception, ensuring reliable performance for critical applications.

Conclusion

The Maxim Integrated MAX814KCPA+ is an essential component for any digital system requiring robust power supply and microprocessor supervision. Its integration of key features such as precision monitoring, power-on reset, manual reset, watchdog timer, and voltage monitor output, packaged in a small form factor, makes it a versatile and reliable choice for designers and engineers.