Maxim Integrated MAX6314US31D4-T Microprocessor Reset Circuit

The MAX6314US31D4-T is a highly reliable, low-power microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of system reliability through its reset function, ensuring that the µP boots up in a known state every time.

This compact device is specifically tailored to maintain system integrity by monitoring the power supply voltage. When the voltage drops below a preset threshold, the MAX6314US31D4-T generates a reset signal, which remains asserted for a minimum timeout period after the voltage rises above the reset threshold. The reset output is available in both active-high and active-low configurations, which makes it versatile for different µP logic levels.

The device operates with a nominal reset threshold voltage of 3.1V, which is suitable for 3.3V powered systems. Its low supply current of only 1.2µA (typical) makes it an excellent choice for power-sensitive applications. The MAX6314US31D4-T comes in a 4-pin SOT-143 package, offering a compact solution for space-constrained designs.

Additionally, the MAX6314US31D4-T features an integrated debounce circuit, which filters out short-duration voltage dips, preventing unnecessary resets and ensuring stable system operation. This is particularly valuable in environments where power supply noise or fluctuations are common.

Key features of the MAX6314US31D4-T include:

• Immunity to short voltage transients
• Low power consumption
• Precision monitoring of 3.1V power supplies
• 150ms (min) reset timeout period
• Active-high and active-low reset outputs
• Wide operating temperature range (-40°C to +85°C)
• Compact SOT-143 package

Designed for use in computers, controllers, intelligent instruments, and critical µP power monitoring, the MAX6314US31D4-T is a straightforward solution for enhancing system reliability and performance. Its ease of integration and minimal power requirements make it an ideal choice for designers looking to bolster their system's stability with a robust reset circuit.