Maxim Integrated MAX6392KA26 Microprocessor Reset Circuit

The Maxim Integrated MAX6392KA26 is a highly reliable and robust microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events. This precision monitoring device is specifically engineered to keep microprocessor systems safe by monitoring the supply voltage and asserting a reset signal whenever the voltage drops below a predetermined threshold, ensuring that the µP and its associated circuitry reset to a known state.

The MAX6392KA26 is characterized by its low supply current and wide operating voltage range, making it an ideal choice for battery-operated and portable devices where power efficiency is crucial. With its ability to operate over a broad voltage range of 1.2V to 5.5V, this supervisory circuit can cater to a variety of low-voltage applications.

One of the key features of this device is its factory-trimmed reset threshold voltage, which for the MAX6392KA26 variant is set at 2.63V. This precision threshold ensures that the reset signal is reliably asserted whenever the monitored voltage falls below this value. The reset output remains asserted for a minimum reset timeout period after the voltage rises above the reset threshold, providing a guaranteed reset signal duration that allows the µP to stabilize.

The MAX6392KA26 comes in a compact SOT23 package, which is highly beneficial for space-constrained applications. Its small footprint does not compromise its performance, as it includes an active-low, push-pull reset output. This output configuration provides a strong, defined logic state that interfaces seamlessly with most µP and logic systems.

Additional features of the MAX6392KA26 include a low power consumption of only 1.6µA (typical) and an immunity to short VCC transients, ensuring stable operation during conditions that might cause false resets in less robust devices. The combination of low power, high accuracy, and small size makes the MAX6392KA26 an excellent choice for portable devices, networking equipment, computers, controllers, and other critical µP-based systems that require reliable monitoring and reset capabilities.

Overall, the Maxim Integrated MAX6392KA26 is a high-performance solution for system designers looking to enhance the reliability and stability of their µP systems with a minimal footprint and power overhead.