Maxim Integrated MAX6315US30D1+T Low-Power Microprocessor Reset Circuits

The MAX6315US30D1+T is a compact, highly-reliable microprocessor (µP) supervisory circuit designed to maintain system integrity during power failures or unexpected events. Manufactured by Maxim Integrated, this device is a vital component for systems that require precise monitoring of their supply voltages. It is specifically designed to assert a reset signal whenever the VCC supply voltage falls below a preset threshold, ensuring that the µP and associated circuitry reset cleanly during power-up, power-down, or brown-out conditions.

This particular model, the MAX6315US30D1+T, has a factory-set reset threshold voltage of 3.0V, making it suitable for 3.3V-powered systems. The reset output is active-low and is guaranteed to remain asserted for a minimum of 140ms after VCC has risen above the reset threshold level. This feature provides ample time for the system to stabilize before the processor starts its operation, thus preventing any erroneous actions during power transitions.

The MAX6315 series boasts a low supply current of typically 1µA, making it an excellent choice for power-sensitive applications. Its small footprint is attributed to the SOT-143 package, which is ideal for space-constrained designs. The device also supports a wide operating temperature range from -40°C to +85°C, allowing it to function reliably in various environments.

Additional features of the MAX6315US30D1+T include a debounced manual reset input, which allows for a manual override of the reset signal, and an ability to ignore short transients on the VCC line, which helps to prevent false resets. The combination of these features makes this reset circuit a robust solution for enhancing system reliability in microprocessor-based applications such as computers, controllers, intelligent instruments, and portable consumer electronics.

For design flexibility, the MAX6315 is available in various threshold voltages and with different reset timeout periods. This enables designers to select the appropriate variant that matches their specific system requirements. Maxim Integrated's MAX6315US30D1+T is a testament to the company's commitment to providing innovative, high-quality integrated circuits that address the critical needs of modern electronic systems.