Maxim Integrated MAX6381XR23D6-T Microprocessor Reset Circuit

The MAX6381XR23D6-T is a compact, high-precision microprocessor (μP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant layer of protection by ensuring that the μP and its associated hardware boot up in the correct state. This is particularly crucial in systems where reliable operation is paramount, and any malfunction due to power issues could lead to critical failures.

This supervisory circuit is tailored to maintain system integrity by monitoring the power supply voltage. It asserts a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold level of 2.3V. The reset signal remains asserted for a minimum reset timeout period after VCC rises above the reset threshold, ensuring the system has adequate time to stabilize before the processor starts up. This timeout period is typically 140ms, which helps prevent system errors during power-up, power-down, and brownout conditions.

The MAX6381XR23D6-T comes in a small, 3-pin SC70 package, making it ideal for space-constrained applications. It operates over a wide temperature range of -40°C to +125°C, which allows for deployment in various environments, from commercial to industrial. The device is also characterized by its low power consumption, drawing a quiescent current of only 1.1µA, which is beneficial for battery-powered applications where power efficiency is critical.

Key features of the MAX6381XR23D6-T include:

• Precision factory-set VCC reset thresholds
• Low 1.1µA supply current
• 140ms minimum reset timeout period
• Wide operating temperature range of -40°C to +125°C
• Small 3-pin SC70 package
• Immune to short VCC transients

The device is suitable for a wide range of applications, such as portable/battery-powered equipment, computers, controllers, intelligent instruments, critical μP and μC power monitoring, and more. As a part of Maxim Integrated's extensive range of power management solutions, the MAX6381XR23D6-T offers a reliable and efficient way to safeguard digital systems from the perils of unpredictable power supplies.