Maxim Integrated's MAX6328UR30 Microprocessor Reset Circuit

The MAX6328UR30 is a precision, low-power microprocessor (µP) reset circuit device from Maxim Integrated, designed to monitor power supplies in digital systems. It provides a high degree of accuracy and reliability in ensuring that a system's microprocessor resets properly during power-up, power-down, or brown-out conditions. This device is specifically tailored for battery-powered applications due to its low power consumption and small footprint.

The MAX6328UR30 operates by monitoring the voltage level of the power supply connected to it. When this voltage drops below a preset threshold, the device asserts a reset signal that holds the microprocessor in a reset state for a minimum of 140ms after the supply voltage exceeds the reset threshold level. This ensures that the microprocessor restarts with a clean slate once adequate power levels are restored.

Key Features of the MAX6328UR30:

• Factory-Set Reset Thresholds: The reset voltage thresholds are precisely preset at the factory, with the MAX6328UR30 variant having a threshold of 3.0V.
• Low Power Consumption: Designed for power-sensitive applications, this device consumes minimal power, making it ideal for portable and battery-operated equipment.
• Guaranteed Reset Valid to VCC = 1V: This feature ensures that the device will continue to function even when VCC drops to as low as 1V.
• Immune to Short VCC Transients: The MAX6328UR30 is designed to ignore fast transients on the VCC line, preventing false resets and ensuring stable operation of the connected microprocessor.
• Low Cost: Maxim Integrated offers this high-quality reset circuit at a competitive price point, providing an economical solution for system stability.

This device comes in a compact, surface-mount SOT23 package, making it an excellent choice for space-constrained applications. The MAX6328UR30 is an ideal solution for managing microprocessor reset functions in a wide array of products, including portable devices, computers, controllers, and intelligent instruments.

With its precision reset threshold, low power consumption, and small size, the MAX6328UR30 from Maxim Integrated is a robust and reliable component that ensures the proper functioning of microprocessor-based systems under various power conditions.