Maxim Integrated's MAX6328UR27+T Microprocessor Reset Circuit

The MAX6328UR27+T is a highly precise, low-power 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 in systems with a 2.7V power supply voltage.

This supervisory circuit is specifically engineered to maintain system integrity by monitoring the power supply voltage levels. When the monitored voltage falls below a preset threshold of 2.7V, the MAX6328UR27+T asserts a reset signal to hold the connected µP in the reset state. This reset signal remains asserted for a minimum timeout period after the voltage exceeds the reset threshold, ensuring the system has adequate time to stabilize before the processor begins operation.

Featuring a low supply current of only 1µA, the MAX6328UR27+T is an ideal solution for portable and battery-operated applications where power conservation is critical. The device's small SOT23 packaging makes it an excellent choice for space-constrained applications, while its extended temperature range of -40°C to +85°C allows for use in a wide range of environments.

Key features of the MAX6328UR27+T include:

• Factory-trimmed V<sub>CC reset threshold of 2.7V suitable for 2.7V-powered systems.
• Low 1µA supply current ideal for battery-operated equipment.
• Minimum reset timeout period of 140ms (minimum) to ensure proper system reset.
• No external components required for a compact system design.
• Immune to short V<sub>CC transients.
• Available in a small SOT23 package.

Applications for the MAX6328UR27+T span a diverse range of sectors including portable devices, computers, controllers, and intelligent instruments. Its ability to provide a reliable reset function helps to protect microprocessors and other sensitive digital systems from erratic behavior caused by low voltage and power glitches. By integrating the MAX6328UR27+T into your design, you can ensure a more robust and dependable system operation.

Maxim Integrated's commitment to quality and innovation is embodied in the MAX6328UR27+T, making it a smart choice for designers looking to enhance system reliability without increasing complexity or cost.