Maxim Integrated MAX6328UR25-T Microprocessor Reset Circuit

The MAX6328UR25-T is a precision microprocessor (µP) reset circuit device designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant level of protection against low-voltage conditions, ensuring that the microprocessor and associated circuitry reset to a known state during a power failure or when the power supply voltage drops below a predetermined threshold.

This device is particularly well-suited for portable and battery-powered applications due to its low power consumption and small footprint. The MAX6328UR25-T operates over a wide voltage range and is preset to a threshold voltage of 2.5V, which makes it an ideal choice for managing 2.5V-powered circuits.

Key Features:

• Precision Voltage Monitoring: The MAX6328UR25-T offers a tight ±1.5% reset threshold accuracy over the entire operating temperature range, ensuring reliable monitoring and system protection.
• Low Power Consumption: With its low supply current of 1µA (typical), it is optimized for use in power-sensitive applications.
• Manual Reset Input: The device includes a manual reset input that allows the user to trigger a system reset with an external pushbutton or logic signal.
• Power Supply Glitch Immunity: The reset output is guaranteed to remain in the correct state for VCC down to 1V, making it highly reliable during power supply transients.
• Compact Package: The MAX6328UR25-T comes in a small SOT23-3 package, which is suitable for space-constrained applications.

The device also features an active-low RESET output, which remains asserted for a minimum reset timeout period after VCC has risen above the reset threshold. This ensures that the µP and other devices are held in reset for an adequate period during power-up, allowing the system to stabilize before operation resumes.

Overall, the MAX6328UR25-T from Maxim Integrated is an essential component for systems that require precise voltage monitoring and reliable reset capabilities, particularly where space and power efficiency are critical considerations. Its robust feature set and easy integration make it a popular choice for designers looking to enhance system reliability and performance.