Maxim Integrated MAX6315US45D3-T Microprocessor Reset Circuit

The MAX6315US45D3-T is a compact, highly-reliable microprocessor (µP) supervisory circuit designed and manufactured by Maxim Integrated. This device is engineered to maintain system integrity by monitoring the power supply voltage in digital systems. It provides a robust solution for managing power-on reset and power-fail warning functions, ensuring that microprocessors and other critical system components operate within safe parameters.

This supervisory circuit features a factory-trimmed reset threshold voltage of 4.5V, suitable for 5V-powered systems. It offers precision monitoring without the need for external components, making it an ideal choice for space-constrained applications. The MAX6315US45D3-T comes in a small 4-pin SOT-143 package, which is highly beneficial for designs where board space is at a premium.

One of the key features of the MAX6315US45D3-T is its ability to assert a reset signal whenever the V_CC voltage drops below the threshold level. The reset output remains asserted for a minimum of 140ms after V_CC has risen above the reset threshold, providing ample time for the system to stabilize. This ensures that the microprocessor and other devices are reset properly during power-up, power-down, and brownout conditions.

The device boasts a low supply current of only 1µA (typical), which is highly advantageous for battery-powered and portable applications where power efficiency is critical. Its wide operating temperature range of -40°C to +85°C allows for reliable operation in harsh environmental conditions.

Additionally, the MAX6315US45D3-T features an active-low RESET output, which is guaranteed to be in the correct state for V_CC down to 1V. This characteristic is particularly important for systems that may experience low voltage conditions, ensuring that the reset signal is maintained even under such scenarios.

In summary, the MAX6315US45D3-T from Maxim Integrated is a robust and reliable solution for system reset management. Its precision voltage monitoring, low power consumption, small footprint, and wide operating temperature range make it an excellent choice for a variety of applications, including portable devices, embedded systems, and industrial controls.