The Maxim Integrated MAX6375UR29 is a precision, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from 2.63V to 5.0V.

This voltage monitor ensures system integrity by providing a reset signal to the µP during power-up, power-down, and brownout conditions. The reset signal remains asserted for a minimum of 140ms after V<sub>CC has risen above the reset threshold level, ensuring a proper system reset. The reset threshold level for the MAX6375UR29 is precisely set at 2.925V, making it suitable for 3V systems and applications that require a higher threshold.

The device operates with a very low supply current of 1.5µA (typical), which is ideal for portable and battery-operated equipment. It comes in a compact SOT-23 package, which is highly favored for space-constrained applications. The MAX6375UR29 features a debounced manual reset input, allowing for a manual reset capability that can be triggered with an external push-button or logic signal.

The MAX6375UR29 also includes an active-low open-drain reset output, providing the flexibility to interface with various logic levels. This output can directly drive a microprocessor reset or can be used to gate the power supply for additional power savings during standby.

Key features of the MAX6375UR29 include:

• Precision monitoring of 3V power supplies
• Low supply current of 1.5µA (typ)
• 140ms (min) reset pulse width
• Debounced manual reset input
• Active-low open-drain reset output
• Compact SOT-23 packaging

The MAX6375UR29 voltage monitor is a reliable solution for systems that require precise voltage monitoring and reset functions, ensuring that digital systems operate within their intended voltage range and providing a robust defense against power supply variations.