Maxim Integrated MAX810JEUR-T Microprocessor Reset Circuit

The MAX810JEUR-T is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. This device provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 3.3V power supply.

This supervisory circuit is specifically tailored to maintain system integrity by monitoring the power supply voltage levels. When the monitored voltage drops below a preset threshold, the MAX810JEUR-T asserts a reset signal to prevent the system's microprocessor from operating under potentially harmful conditions, such as low voltage that could lead to incorrect operation. The reset signal remains asserted for a minimum of 140ms after the supply voltage rises above the reset threshold, ensuring that the system has adequate time to stabilize before resuming operation.

The MAX810JEUR-T comes in a compact SOT-23 package, making it ideal for space-constrained applications. Its low supply current of 17µA (typical) makes it suitable for battery-operated equipment. The device features an active-low RESET output, which is guaranteed to be in the correct state for V_CC down to 1V, ensuring reliable system reset even during low voltage conditions.

Key features of the MAX810JEUR-T include:

• Precision factory-set V_CC reset thresholds suitable for 3.3V-powered systems.
• Immunity to short V_CC transients, avoiding false triggers and unnecessary system resets.
• Low power consumption, enhancing battery life in portable devices.
• Capability to assert reset signal with V_CC as low as 1V, ensuring proper behavior during power-down or brown-out conditions.
• RoHS compliance, adhering to environmental standards and regulations.

Applications for this reset circuit span a wide range, including computers, controllers, intelligent instruments, portable/battery-powered equipment, and embedded systems. The MAX810JEUR-T's robustness and simplicity make it an essential component for ensuring the reliable operation of digital systems that require consistent monitoring of their power supply.

With its combination of features, the MAX810JEUR-T from Maxim Integrated is an excellent choice for designers looking to enhance system reliability without incurring additional complexity or cost.