Maxim Integrated MAX6804US30D1+T Microprocessor Reset Circuit

The MAX6804US30D1+T from Maxim Integrated is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial function in ensuring system stability by resetting the microprocessor during power-up, power-down, and brown-out conditions. The device helps to prevent erroneous operation when the supply voltage falls below a predetermined threshold.

This supervisory circuit operates with a nominal supply voltage of 3.0V, making it suitable for low voltage applications such as portable devices, embedded systems, and other electronics that require energy efficiency. The MAX6804US30D1+T comes in a space-saving SOT-143 package, which is ideal for systems where board space is at a premium.

One of the key features of the MAX6804 is its ability to assert a reset signal whenever the VCC supply voltage drops below the factory-set reset threshold level. The reset output remains asserted for a minimum reset timeout period after VCC has risen above the reset threshold, ensuring the µP has sufficient time to stabilize and initialize properly. This timeout period is typically 140ms, which helps to prevent system errors during transient conditions.

The device boasts a low supply current of only 10µA, contributing to the overall power efficiency of the system it is integrated into. Additionally, the MAX6804US30D1+T is characterized for operation over a wide temperature range of -40°C to +85°C, ensuring reliable performance across various environmental conditions.

The MAX6804US30D1+T also features an active-low RESET output, which provides a guaranteed valid reset signal down to VCC = 1V. This feature is particularly important for systems that operate at low voltages and may experience significant drops in power supply levels.

Overall, the Maxim Integrated MAX6804US30D1+T is a robust and essential component for any system that relies on a microprocessor or microcontroller. It helps to ensure that digital systems operate correctly by providing a reliable reset mechanism during power disturbances, thereby enhancing the stability and reliability of the application it serves.