Maxim Integrated MAX6348UR44 Microprocessor Reset Circuit

The MAX6348UR44 from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of protection to your digital systems by ensuring that the µP and its peripherals are reset properly during a power failure or whenever the voltage drops below a predetermined threshold.

This compact, low-power device is ideal for use in a wide range of applications, including portable/battery-powered equipment, computers, controllers, and intelligent instruments. Its primary function is to maintain system integrity by asserting a reset signal to the µP during power-up, power-down, and brownout conditions.

The MAX6348UR44 features a factory-trimmed reset threshold voltage of 4.4V, which is suitable for 5V-powered systems. The reset output remains asserted for a minimum of 140ms after V_CC has risen above the reset threshold level, providing ample time for the system to stabilize upon power-up.

Key features of the MAX6348UR44 include:

• Accurate Monitoring of 5V Power-Supply Voltages
• 140ms Minimum Power-On Reset Pulse Width
• Low Supply Current of 1.2µA (Typical)
• Guaranteed Reset Valid to V_CC = 1V
• No External Components Required
• Compact SOT23 Packaging

The device operates over a wide temperature range, making it suitable for demanding environments. The MAX6348UR44 is available in a small SOT23-3 package, which is ideal for space-constrained applications. Its simplicity of use, with no external components required, makes it an excellent choice for system designers looking to enhance the reliability of their systems with minimal additional complexity.

Overall, the MAX6348UR44 is a testament to Maxim Integrated's commitment to providing robust and easy-to-implement solutions for power management and system integrity. Whether you're designing a new system or looking to upgrade an existing one, the MAX6348UR44 offers a straightforward way to protect your investment and ensure continuous, reliable operation.