Maxim Integrated MAX6361PUT26 Microprocessor Supervisory Circuit

The Maxim Integrated MAX6361PUT26 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 ensures that the µP starts up in a known state by asserting a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. This feature is crucial for systems that require a stable and reliable startup.

The MAX6361PUT26 is part of Maxim's family of pin-compatible watchdog timers, and it comes in a compact SOT23-6 package, making it suitable for space-constrained applications. Its small size and low power consumption make it an ideal choice for portable and battery-powered electronics.

Key features of the MAX6361PUT26 include:

• Factory-trimmed VCC reset threshold suitable for 5V-powered circuits.
• 140ms (min) reset timeout to ensure proper system reset.
• Watchdog timer with 1.6s (typ) timeout to monitor µP activity.
• Manual reset input for triggered system resets.
• Low supply current of 4µA (typ) for energy-efficient operation.
• Guaranteed reset valid to VCC = 1V for low-voltage conditions.
• Immune to short VCC transients to prevent false resets.

The device operates over a wide temperature range of -40°C to +85°C, catering to industrial applications that may be exposed to extreme conditions. It is also characterized for the automotive temperature range of -40°C to +125°C, making it suitable for use in vehicle electronics.

Whether you're designing consumer electronics, computers, controllers, or automotive systems, the Maxim Integrated MAX6361PUT26 offers a simple and robust solution for enhancing system reliability through power supply monitoring and µP supervision.