Maxim Integrated's MAX811LEUS - Microprocessor (µP) Supervisory Circuit

The MAX811LEUS from Maxim Integrated is a compact, highly-reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial safeguard against low voltage conditions, which can lead to system errors and data corruption. This supervisory circuit is an essential component for systems that require a high level of operational stability and data integrity.

With its precision voltage monitoring capability, the MAX811LEUS ensures that the microprocessor and other critical system components are reset to a known, stable state in the event of a power failure or brownout condition. The device features an active-low reset output, which remains asserted until the supply voltage reaches the reset threshold level and maintains this state for a specified period after the supply voltage has risen above the threshold, ensuring a proper system reset.

The MAX811LEUS offers a reset threshold voltage of 4.63V, which is suitable for 5V-powered systems. The reset timeout period is fixed at 140ms, providing ample time for the system to stabilize after a power disturbance. This supervisory circuit is available in a compact SOT-143 package, making it ideal for space-constrained applications where board real estate is at a premium.

Key features of the MAX811LEUS include:

• Low power consumption, ideal for battery-operated and portable devices.
• Guaranteed reset valid to Vcc = 1V, ensuring reliable operation during low voltage conditions.
• Immunity to short Vcc transients, enhancing system robustness.
• No external components required, simplifying design and reducing overall system cost.

This supervisory circuit is widely used in applications such as computers, controllers, intelligent instruments, portable/battery-powered equipment, and any other system that cannot tolerate voltage uncertainties without compromising functionality. By integrating the MAX811LEUS into their designs, engineers can ensure their systems maintain operational integrity and protect against unexpected power supply issues.

The MAX811LEUS from Maxim Integrated is a testament to the company's commitment to providing high-quality, reliable solutions for power monitoring and system control, making it a trusted choice for designers looking to enhance the safety and reliability of their digital systems.