Maxim Integrated MAX6704MKA-T Microprocessor Reset Circuit

The MAX6704MKA-T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in 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 features a precision temperature-compensated voltage reference and comparator circuit to monitor the status of the power supply (Vcc). The reset output is triggered when the Vcc drops below the factory-set reset threshold level. The reset signal remains asserted for a minimum reset timeout period after Vcc rises above the reset threshold, ensuring the system has adequate time to stabilize before the processor is allowed to execute code.

The MAX6704MKA-T comes in a compact SOT-23 package, making it suitable for space-constrained applications. It operates over a wide temperature range, ensuring reliable performance in diverse operating environments.

Key features of the MAX6704MKA-T include:

• Factory-set reset threshold levels ranging from 2.32V to 4.63V
• Minimum reset timeout period of 140ms, ensuring system stability
• Low supply current of 5.5µA (typical), ideal for battery-powered applications
• Guaranteed reset valid to Vcc = 1V, accommodating low power conditions
• Immune to short Vcc transients, preventing false resets

This reset circuit is particularly suited for portable devices, computers, controllers, and intelligent instruments where reliable monitoring of the system power supply is critical. Its ease of integration and robust feature set make the MAX6704MKA-T an excellent choice for designers looking to enhance system reliability without incurring significant additional costs or design complexities.

By integrating the MAX6704MKA-T into your design, you can achieve a higher level of system protection and reduce the risk of data corruption or loss due to unexpected power failures or brown-out conditions.