Maxim Integrated MAX6314US31D3+T Microprocessor Reset Circuit

The MAX6314US31D3+T is a highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events. Manufactured by Maxim Integrated, a leader in analog and mixed-signal engineering, this compact device is essential for managing system resets and power-on reset control in digital systems.

This device operates with a nominal reset threshold level of 3.1V, making it suitable for 3.3V-powered systems. Its primary function is to monitor the supply voltage and assert a reset signal to the µP whenever the supply voltage drops below the preset threshold. The reset output remains asserted for a minimum of 140ms after the supply voltage rises above the reset threshold, ensuring the system has adequate time to stabilize before resuming operation. This feature is crucial for preventing system errors and data corruption during power-up, power-down, or brown-out conditions.

The MAX6314US31D3+T comes in a compact SOT-143 package, which is ideal for space-constrained applications. Its low power consumption and wide operating temperature range of -40°C to +85°C make it suitable for portable devices, embedded systems, and industrial controls.

Key features of the MAX6314US31D3+T include:

• Immunity to short V<sub>CC transients
• Low supply current of 1.2µA (typical)
• Guaranteed reset valid to V<sub>CC = 1V
• No external components required
• Debounced manual reset input

With its built-in manual reset capability, the device allows for a manual system reset, which can be triggered by an external push-button or logic signal. This manual reset input is debounced to prevent spurious resets caused by noise or contact bounce.

The MAX6314US31D3+T is designed to support a broad range of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring. Its robust design ensures reliable operation, making it an excellent choice for designers looking for a simple, effective solution to protect their digital systems.