Maxim Integrated MAX6314US25D1 Microprocessor Reset Circuit

The Maxim Integrated MAX6314US25D1 is a compact, high-precision microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of system reliability through its ability to reset a microprocessor during power-up, power-down, and brown-out conditions, ensuring that the µP starts in a known state.

This device comes in a highly compact SOT-143 package, making it suitable for space-constrained applications. The MAX6314US25D1 is designed to maintain system integrity by monitoring the supply voltage (V<sub>CC) and keeping the microprocessor in the reset state until V<sub>CC has reached the stable operating voltage level of 2.5V. Once this threshold is met, the reset signal is kept active for approximately 140ms after V<sub>CC rises above the reset threshold, providing a sufficient time margin for the system to stabilize.

The reset output from the MAX6314US25D1 is active-low, which is a common configuration compatible with many microprocessors and digital ICs. This ensures that the reset signal is asserted (low) when a reset is required, and is deasserted (high) when the system is operating normally.

Key features of the MAX6314US25D1 include:

• High precision monitoring of 2.5V power supplies
• Low supply current of 1.2µA (typical), which is ideal for battery-operated equipment
• 140ms minimum power-on reset pulse width that guarantees a reliable system reset
• Immune to short V<sub>CC transients, enhancing system robustness
• Active-low RESET output
• Compact SOT-143 package suitable for space-saving designs

The MAX6314US25D1 is a reliable choice for managing system reset functions in a variety of digital applications, including computers, controllers, intelligent instruments, and portable/battery-powered equipment. Its low power consumption and precision voltage monitoring make it an essential component for systems that require consistent operation and a high degree of uptime.

Maxim Integrated's commitment to quality and reliability is evident in the MAX6314US25D1, providing designers with a trusted solution for their microprocessor supervisory needs.