Maxim Integrated MAX6806UR46+T Microprocessor Reset Circuit

The MAX6806UR46+T is a compact, highly efficient microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. Manufactured by Maxim Integrated, this device ensures that the µP and its peripherals are reset properly during a power failure or whenever the voltage supplied falls below a predetermined threshold. This feature is crucial for maintaining system integrity and preventing data corruption.

The MAX6806UR46+T comes in a small, 3-pin SOT-23 package, making it ideal for space-constrained applications. It operates over a wide voltage range and features a factory-trimmed reset threshold voltage of 4.63V, tailored for systems that require a precise monitoring voltage level. This voltage level is particularly suitable for 5V-powered systems, providing a safe margin to account for power supply variations and ensuring the system has adequate time to complete the reset process before the supply drops too low.

One of the key features of the MAX6806UR46+T is its low power consumption, drawing a quiescent current of only 1.5µA. This makes it an excellent choice for portable and battery-operated devices where power efficiency is paramount. The device also offers a reset timeout period of 140ms (min), which gives the system enough time to stabilize after a reset has been initiated.

Additionally, the MAX6806UR46+T provides an active-low reset output, which remains asserted for the duration of the timeout period once the monitored voltage falls below the reset threshold. This output can directly interface with the reset or chip-enable inputs of µPs, microcontrollers, and other digital ICs, ensuring a reliable reset operation.

In summary, the MAX6806UR46+T from Maxim Integrated is a robust and reliable solution for monitoring power supply conditions in digital systems. Its small footprint, precision voltage monitoring, low power consumption, and active-low reset output make it an essential component for enhancing system reliability in a wide range of applications, including portable devices, embedded systems, and industrial controls.