The MAX803REXR, from Maxim Integrated, is a highly reliable, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a significant level of system integrity by asserting a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the µP and its peripherals are reset properly during power-up, power-down, and brown-out conditions.

Key Features

• Precision Monitoring: The MAX803REXR offers precision voltage monitoring with factory-set reset threshold voltages ranging from 2.63V to 5V, ensuring compatibility with a variety of microprocessors and digital systems.
• Low Power Consumption: This device is designed for energy-efficient operation, consuming minimal power and thereby extending battery life in portable applications.
• Manual Reset Input: A manual reset input is provided, which allows for a reset to be triggered with an external switch or logic signal, offering additional system control flexibility.
• Reset Output: The reset output is available in both active-low (MAX803) and active-high (MAX809) configurations, providing a versatile solution that can interface with a wide array of µP and logic systems.
• Power Supply Glitch Immunity: The device ensures stable operation by maintaining the reset output in the active state during VCC transients, glitches, or short interruptions, thereby enhancing system reliability.

Applications

The MAX803REXR is ideal for use in a broad range of applications, including:

• Computers and Servers
• Embedded Systems
• Portable/Battery-Powered Equipment
• Networking and Communications Equipment
• Data Storage

Package and Temperature Range

The device is available in a compact SOT-323 package, which is suitable for space-constrained applications. It operates over an extended temperature range of -40°C to +85°C, making it suitable for industrial applications where temperature extremes are a concern.

In summary, the MAX803REXR by Maxim Integrated is a versatile, reliable, and energy-efficient supervisory circuit that enhances the operational stability of digital systems by providing essential monitoring and control functions.