Maxim Integrated MAX6314US30D4-T Microprocessor Reset Circuit

The MAX6314US30D4-T is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +3V-powered circuits. This device is particularly well-suited for portable electronics due to its low power consumption and small footprint.

The MAX6314US30D4-T ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. It asserts a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold of 3.0V. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset threshold, ensuring the system has sufficient time to stabilize before the processor starts operating.

This supervisory circuit comes in a compact SOT-143 package, making it ideal for space-constrained applications. The MAX6314US30D4-T features an active-low, open-drain reset output, which allows multiple devices to be wire-connected to a common reset line. This configuration also supports the use of an external pull-up resistor for specific voltage level requirements or interfacing with other logic levels.

Key features of the MAX6314US30D4-T include:

• Factory-set reset threshold voltage of 3.0V
• Minimum reset timeout of 140ms
• Low supply current of 1.2µA (typical), ideal for battery-powered equipment
• Immune to short VCC transients
• Open-drain reset output
• Guaranteed reset valid to VCC = 1V
• Operating temperature range from -40°C to +85°C
• Compact SOT-143 package

Applications for the MAX6314US30D4-T include portable/battery-powered equipment, computers, controllers, intelligent instruments, critical µP and µC power monitoring, and any system where a precise and reliable reset is crucial for proper operation.

In summary, the Maxim Integrated MAX6314US30D4-T is a purpose-built supervisory circuit that offers a simple and efficient solution for managing system resets, contributing to the overall stability and reliability of electronic systems.