Maxim Integrated MAX6315US26D2 Low-Power Microprocessor Reset Circuit

The MAX6315US26D2 is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant function by ensuring that the µP and its associated hardware are reset to a known state during power-up, power-down, or brown-out conditions. This particular model ensures a 2.63V reset threshold level, suitable for systems that operate with specific voltage requirements.

Encased in a small SOT-143 package, the MAX6315US26D2 is optimized for space-constrained applications. It is an ideal choice for portable devices, where size and power consumption are critical considerations. The device is characterized by its low power consumption, drawing a quiescent current of only 1µA, which is advantageous for battery-operated equipment by extending the battery life.

One of the key features of the MAX6315 is its precision voltage monitoring capability. It is designed to maintain system integrity by asserting a reset signal whenever the VCC supply voltage falls below its preset threshold. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset threshold, ensuring proper system reset. This timing accuracy is maintained over the full temperature range and does not require any external components.

The MAX6315US26D2 offers an active-low RESET output, which is guaranteed to be in the correct state for VCC down to 1V. This makes the device suitable for low-voltage operation, a common requirement in modern electronic designs. The device's built-in debounce circuitry ensures that erratic system behavior due to noisy inputs is minimized.

In summary, the Maxim Integrated MAX6315US26D2 is a robust and reliable solution for system designers who need to protect their digital systems from the dangers of unpredictable power supply conditions. Its low power consumption, small footprint, and precision voltage monitoring make it an excellent choice for a wide range of applications, including portable devices, embedded systems, and other microprocessor-based hardware.