Maxim Integrated MAX6831VFUT+T Microprocessor Supervisory Circuit

The Maxim Integrated MAX6831VFUT+T is a highly compact, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating the need for external components and adjustments when monitoring nominal system voltages from 1.8V to 5.0V.

This supervisory circuit is particularly well-suited for portable, battery-powered equipment due to its low 1.5µA supply current, which significantly extends battery life. The MAX6831VFUT+T ensures that the µP boots up in a known state by asserting a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold. The reset output remains asserted for a minimum timeout period after VCC has risen above the reset threshold, providing a guaranteed reset duration and allowing the power supply and processor to stabilize.

The device comes in a small, 6-pin SOT23 package, making it ideal for space-constrained applications. It operates over a wide temperature range of -40°C to +125°C, ensuring reliable performance across diverse operating conditions. The MAX6831VFUT+T features a reset threshold voltage of 4.38V, with other options available to accommodate different system requirements.

Key features of the MAX6831VFUT+T include:

• Factory-Set Reset Threshold Voltages for 1.8V, 2.5V, 3.0V, 3.3V, and 5.0V Supplies
• Low 1.5µA Supply Current
• Guaranteed Reset Valid to VCC = 1.0V
• 140ms Min Reset Timeout Period
• No External Components
• Immune to Short VCC Transients
• Wide Operating Temperature Range: -40°C to +125°C

Overall, the Maxim Integrated MAX6831VFUT+T is an efficient solution for system monitoring, offering robust features in a miniature package. Its precision and low power consumption make it an excellent choice for managing power-on reset functions in microprocessor systems, ensuring proper operation through a variety of conditions.