Maxim Integrated MAX6315US30D3+T Low-Power, SOT-143, µP Reset Circuits

The MAX6315US30D3+T is a compact, high-precision microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant line of defense against system failures caused by fluctuations and unregulated power supplies. Housed in a small SOT-143 package, this device is ideal for space-constrained applications requiring the highest level of reliability.

This microprocessor reset circuit operates with a nominal reset threshold voltage of 3.0V, making it well-suited for 3.3V-powered systems. The MAX6315US30D3+T ensures that the µP resets cleanly during power-up, power-down, and brown-out conditions. Upon detecting that the VCC supply voltage has dropped below the factory-set reset threshold, the reset output is asserted, which remains active for a minimum reset pulse width of 140ms after VCC has risen above the reset threshold. This feature provides the processor ample time to return to a stable operating condition before resuming operation.

One of the key features of this device is its low power consumption, with a typical supply current of only 1µA, which is particularly beneficial for portable and battery-operated equipment. Additionally, the MAX6315US30D3+T offers an excellent temperature stability of ±2% over the full temperature range of -40°C to +85°C. This precision ensures reliable operation even under extreme environmental conditions.

The device includes a debounced manual reset input that allows for a forced reset, making it versatile for a variety of applications. The open-drain reset output of the MAX6315US30D3+T can be connected to a pull-up resistor to a voltage higher than VCC, allowing for a reset signal to be distributed across different voltage domains within a system.

Engineered for ease of use, the MAX6315US30D3+T requires no external components, and its plug-and-play nature simplifies system design. It is commonly used in applications such as computers, controllers, intelligent instruments, portable/battery-powered equipment, and embedded systems, where maintaining the integrity of the operational state is critical.

Overall, the Maxim Integrated MAX6315US30D3+T provides a robust and reliable solution for system monitoring, ensuring that digital systems maintain their performance and stability across a wide range of supply conditions.