Maxim Integrated MAX6426UK39+T Voltage Detector

The Maxim Integrated MAX6426UK39+T is a highly precise, low-power voltage detector designed for a variety of applications that require voltage monitoring with minimal power consumption. This compact device is part of Maxim's family of microprocessor (µP) supervisory circuits that provide a reliable solution for monitoring power supplies in µP and digital systems. It ensures that the system's voltage levels remain within specific thresholds, thereby protecting the system from improper operation at low voltages.

Encased in a small SOT-23 package, the MAX6426UK39+T is optimized for space-constrained applications. It operates over a wide voltage range and has a preset threshold voltage of 3.9V, making it suitable for monitoring 3.3V power supplies and other voltage rails close to this threshold. The detector provides a reset output, which remains asserted for a minimum reset timeout period after V<sub>CC rises above the reset threshold. This feature ensures that the system has sufficient time to stabilize before the processor starts or resumes operation.

One of the key features of the MAX6426UK39+T is its low power consumption, drawing a quiescent current of only 1.2µA (typical), which is ideal for battery-operated and portable devices where power efficiency is critical. Additionally, the device offers excellent temperature stability and low supply current, further enhancing its reliability in demanding environments.

The MAX6426UK39+T also includes a manual reset input, which provides a means to trigger a system reset externally. This is useful for implementing a push-button reset function or for connecting to other system components that may require a manual reset capability.

With its built-in hysteresis, the voltage detector prevents rapid on/off cycling due to transient noise, ensuring stable operation. The device is also fully specified over the -40°C to +125°C extended temperature range, which allows it to perform reliably in industrial and automotive applications that experience extreme temperature variations.

In summary, the Maxim Integrated MAX6426UK39+T voltage detector is a versatile, low-power, and reliable solution for system voltage monitoring. Its features make it an excellent choice for applications ranging from battery-powered devices to automotive and industrial systems where accurate voltage detection is crucial for system integrity and performance.