Maxim Integrated's MAX6829TWUT Microprocessor Reset Circuit

The MAX6829TWUT is a high-precision microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems that require voltage monitoring.

This compact device is highly suited for portable electronics due to its small 6-pin SOT-23 package, making it ideal for space-constrained applications. It ensures system integrity by monitoring the power supply voltage and keeping the µP reset active for a minimum of 140ms after VCC has risen above the reset threshold level. This feature gives the system power supply time to stabilize before the processor starts, which helps prevent erroneous operation.

The MAX6829TWUT offers a variety of features that make it a robust choice for critical applications. It has a precision VCC reset threshold and a low supply current of only 5.5µA, which is particularly beneficial for battery-powered devices. The reset output stage can sink or source current, where RESET is a push-pull output and RESET is an open-drain output.

Additionally, the device's reset comparator is designed to ignore fast transients on VCC, which enhances system stability by preventing false resets. The wide operating temperature range of -40°C to +125°C allows the MAX6829TWUT to be used in environments with extreme temperature variations.

Furthermore, the MAX6829TWUT is designed with an active-low RESET output, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level. This ensures that the µP is held in the reset state until conditions are stable for proper operation.

In summary, the MAX6829TWUT from Maxim Integrated is a reliable and efficient solution for monitoring power supply voltages in microprocessor systems. Its small form factor, low power consumption, and robust feature set make it an excellent choice for a wide range of applications, from portable devices to industrial controls.