Maxim Integrated MAX6381XR46D2/V+T Microprocessor Reset Circuit

The Maxim Integrated MAX6381XR46D2/V+T is a high-quality microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant layer of protection against low voltage, which can lead to system malfunctions, data corruption, or even system failures. This compact component is crucial for ensuring the reliable operation of µP systems by asserting a reset signal whenever the VCC supply voltage drops below a preset threshold.

With a factory-set reset threshold voltage of 4.63V, the MAX6381XR46D2/V+T is tailored for systems that operate at 5V power supply levels. It maintains the reset output for a minimum of 140ms after VCC has risen above the reset threshold, ensuring that the µP has ample time to stabilize and initialize properly before resuming operation. This feature is particularly important in preventing system errors during power-up, power-down, and brownout conditions.

The device comes in a compact, surface-mount SC70 package, which is ideal for space-constrained applications. It is also available in a variety of other standard SOT packages, providing designers with flexibility in their layout designs. The MAX6381XR46D2/V+T operates over an extended temperature range of -40°C to +125°C, making it suitable for use in a wide range of industrial and consumer applications where temperature extremes are a concern.

Key features of the MAX6381XR46D2/V+T include:

• 4.63V ±1.5% reset threshold voltage
• 140ms (min) reset timeout period
• Low power consumption
• Guaranteed reset valid to VCC = 1V
• Immune to short VCC transients
• SC70 packaging for space-saving applications

This device is ideal for use in computers, controllers, intelligent instruments, portable/battery-powered equipment, and other microprocessor-based systems that require precise monitoring of the power supply voltage. The MAX6381XR46D2/V+T's combination of features ensures that it is a reliable and essential component for maintaining system integrity and preventing data loss due to power supply issues.