Maxim Integrated MAX6383XR30D2+T Microprocessor Reset Circuit

The MAX6383XR30D2+T from Maxim Integrated is a high-quality microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 3.0V-powered circuits.

This device is particularly efficient in providing a reset signal to the µP during power-up, power-down, and brown-out conditions. With its precision factory-set V<sub>CC reset threshold voltage, the MAX6383XR30D2+T ensures that the µP resets cleanly during power fluctuations and maintains proper operation by preventing code execution errors.

One of the key features of this supervisory circuit is its ability to assert a reset signal if the V<sub>CC supply voltage falls below the preset threshold. The reset output remains asserted for the reset timeout period after V<sub>CC rises above the reset threshold, ensuring the system has adequate time to stabilize before the processor starts operating. This timeout period is internally set to a minimum of 140ms, which provides a stable reset signal even in the face of fast transient voltage drops.

The MAX6383XR30D2+T comes in a compact SOT-323 package and is designed for surface-mount technology (SMT), making it suitable for high-density PCB layouts. Its small size and low power consumption make it an ideal choice for portable and space-constrained applications such as handheld devices, consumer electronics, and embedded systems.

Key features of the MAX6383XR30D2+T include:

• Factory-set reset threshold voltage for 3.0V systems
• Minimum 140ms reset timeout period
• Low supply current of 1.2µA (typical)
• Guaranteed reset valid to V<sub>CC = 1V
• Operates over a wide temperature range of -40°C to +125°C
• Compact 3-pin SOT-323 package

With its robust design and precise voltage monitoring, the MAX6383XR30D2+T is an essential component for systems that require reliable operation under varying power conditions. Maxim Integrated's commitment to quality ensures that this reset circuit will maintain system integrity and prevent data corruption due to unexpected power interruptions.