Microchip Technology MIC809JU-TR Microcontroller Supervisor IC

The MIC809JU-TR from Microchip Technology is a highly reliable, compact supervisor integrated circuit (IC) designed to monitor power supply voltages in microcontroller systems. This tiny component plays a crucial role in ensuring that your digital systems operate within their intended voltage thresholds, thereby protecting them from the potential risks associated with unpredictable power supply conditions.

One of the key features of the MIC809JU-TR is its ability to perform a precise monitoring function for a 3V power supply. With a threshold voltage typically set around 2.63V, it ensures that the connected microcontroller or processor does not operate under voltages that could lead to malfunction or damage. When the supply voltage falls below the threshold, the MIC809JU-TR asserts a reset signal, which remains active until the supply voltage returns to an acceptable level, plus a built-in delay time to ensure system stability.

This supervisor IC comes in a SOT-23 package, which is known for its small footprint on PCBs, making it an excellent choice for space-constrained applications. Its active-low, open-drain reset output can interface directly with the reset pin of most microcontrollers, providing a simple and efficient way to implement a watchdog timer or manual reset capability.

With its low power consumption, the MIC809JU-TR is an energy-efficient solution suitable for battery-operated devices. It has an operating temperature range of -40°C to +85°C, which allows it to perform reliably in a wide range of environmental conditions. Furthermore, the device is characterized for operation from 1V to 5.5V, providing the flexibility to work with various logic levels and power supplies.

The MIC809JU-TR is an ideal choice for managing system resets in portable devices, computers, controllers, intelligent instruments, and other sophisticated electronic systems that require high reliability in power monitoring. Its ease of use, combined with Microchip's reputation for quality, makes it a go-to component for engineers looking to enhance the robustness of their system designs.