Maxim Integrated MAX6349THUT+T Microprocessor Reset Circuit

The MAX6349THUT+T is a compact, high-precision microprocessor (μP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a single +3.0V to +3.6V power-supply voltage.

This microprocessor reset 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 prevents the system processor from operating in unknown conditions, which can lead to errors and instability.

The MAX6349THUT+T comes in a compact SOT23, 6-pin package, making it an ideal choice for space-constrained applications. Its small size and high level of integration make it perfect for portable devices, where space is at a premium and power consumption needs to be minimized.

Key Features:

• Factory-trimmed VCC reset threshold voltages ranging from 2.32V to 4.63V.
• Low supply current of 1.2μA, which is beneficial for power-sensitive applications.
• Guaranteed reset valid to VCC = +1.0V, ensuring reliable operation under a wide range of conditions.
• No external components are required, simplifying design and reducing bill of materials.
• 140ms min power-on reset pulse width provides ample time for the system to stabilize before the processor starts.
• Immune to short VCC transients, enhancing system stability.

The MAX6349THUT+T is ideal for use in a variety of applications, including embedded systems, computers, controllers, intelligent instruments, portable/battery-powered equipment, and any other system that requires a precise and reliable reset signal for proper operation.

By incorporating the MAX6349THUT+T into your design, you can improve the reliability and performance of your electronic systems, ensuring that they operate as intended even in the face of power supply fluctuations or interruptions.