Maxim Integrated MAX703CSA Microprocessor Supervisory Circuit

The MAX703CSA from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V-powered circuits.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, and brown-out conditions. The MAX703CSA integrates several key features, including a reset output during power-up, power-down, and brown-out conditions, a 200ms reset pulse width, and a manual reset feature. The reset output remains operational with VCC as low as 1V.

Key Features:

• Precision Voltage Monitor: The MAX703CSA features a precision voltage monitor that keeps a constant check on the power supply voltage. It ensures that the µP is held in the reset state until the system voltage stabilizes above the reset threshold.
• Manual Reset Capability: A manual reset input is provided, allowing for a reset to be triggered with an external pushbutton or logic signal, offering additional control and safety.
• Minimum External Components: Designed to simplify the system design, this supervisory circuit requires no external components, which reduces the overall bill of materials and saves board space.
• Reset Signal: The device generates a reset signal for a minimum of 200ms after VCC has risen above the reset threshold level, ensuring the µP starts up correctly every time.
• Low Power Consumption: With its low power consumption, the MAX703CSA is suitable for power-sensitive applications, contributing to the efficiency of the overall system.

Applications:

The MAX703CSA is ideal for use in a wide range of applications that require reliable voltage monitoring and reset capabilities. These include:

• Computers and Controllers
• Embedded Systems
• Portable/Battery-Powered Equipment
• Intelligent Instruments
• Critical µP Power Monitoring

Maxim Integrated's commitment to quality and innovation ensures that the MAX703CSA supervisory circuit is a smart choice for designers looking to enhance system reliability and performance without incurring high costs or complexity.