Maxim Integrated MAX6745XKVD3 Low-Power Microprocessor Supervisory Circuit

The MAX6745XKVD3 from Maxim Integrated is a compact, 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 monitoring nominal system voltages from 1.8V to 5V.

This supervisory circuit ensures that the µP starts up in a known state by asserting a reset signal whenever the VCC supply voltage falls below a preset threshold. The reset output remains asserted for a minimum timeout period after VCC has risen above the reset threshold, providing a guaranteed reset duration and allowing the power supply and processor to stabilize before resuming operation.

Key features of the MAX6745XKVD3 include:

• Factory-Trimmed Reset Thresholds: The device offers a variety of factory-trimmed threshold voltages suitable for monitoring a range of supply voltages, ensuring flexibility for different application requirements.
• Low Power Consumption: With its low supply current of only 7.5µA, the MAX6745XKVD3 is ideal for portable and battery-powered applications where power efficiency is critical.
• Manual Reset Input: A manual reset input allows for a reset to be asserted at any time by an external signal, providing additional system-level control.
• Watchdog Timer: An integrated watchdog timer improves system reliability by resetting the µP if it fails to strobe within a preset timeout period.
• Immune to Short VCC Transients: The device is designed to ignore brief dips in VCC, which prevents false resets from occurring due to transient conditions.
• Compact SOT Package: The MAX6745XKVD3 comes in a small, 5-pin SOT23 package, making it suitable for space-constrained applications.

Applications for the MAX6745XKVD3 include portable devices, computers, controllers, and intelligent instruments where reliable system operation is paramount. Its combination of features ensures that systems remain operational and protected, even in the face of power supply irregularities.

Overall, the Maxim Integrated MAX6745XKVD3 supervisory circuit is an essential component for enhancing system reliability, offering a robust set of features in a small footprint, and is a top choice for designers looking to improve the safety and performance of their digital systems.