Maxim Integrated MAX6302CUA Microprocessor Supervisory Circuit

The MAX6302CUA from Maxim Integrated is a highly reliable 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 with 5V-powered circuits.

This device features a combination of functions that make it ideal for microprocessor systems. It includes a reset output during power-up, power-down, and brownout conditions. The reset signal remains active for a minimum of 140ms after VCC has risen above the reset threshold level, ensuring that the µP is fully reset and ready to operate correctly once the power is stable.

The MAX6302CUA comes in a compact 8-pin µMAX package, making it suitable for space-constrained applications. It operates over a wide temperature range of -40°C to +85°C, ensuring reliable performance in various environments.

Key features of the MAX6302CUA include:

• Reset threshold suitable for 5V-powered circuits
• 140ms min power-on reset pulse width
• Debounced manual reset input
• Independent watchdog timer with 1.6s timeout (typ)
• Low supply current of 20µA (typ)
• Guaranteed reset valid to VCC = 1V

The device also includes a watchdog timer that helps ensure proper system operation by resetting the µP if it fails to strobe within a preset timeout period. This feature is essential for systems that require high reliability and can help prevent costly system failures.

With its combination of reset logic with watchdog timer and manual reset input, the MAX6302CUA provides a robust solution for system monitoring. It is particularly well-suited for use in portable computers, controllers, intelligent instruments, critical µP and µC power monitoring, and automotive systems where the integrity of operation is paramount.

Maxim Integrated's commitment to quality ensures that the MAX6302CUA supervisory circuit meets the stringent requirements of the most demanding applications, providing designers with a trusted solution for system management and protection.