Maxim Integrated MAX6315US46D3-T Microprocessor Reset Circuit

The MAX6315US46D3-T is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides a significant level of system reliability through its ability to reset a µP during power-up, power-down, and brownout conditions. The device is available in a small SOT-143 package, making it ideal for space-constrained applications.

With a factory-trimmed reset threshold voltage of 4.63V, the MAX6315US46D3-T ensures that systems operating at 5V supply levels are kept within their safe operating conditions. This device is particularly well-suited for portable and battery-operated equipment due to its low power consumption and high precision voltage monitoring.

One of the key features of the MAX6315US46D3-T is its ability to provide a reset signal to the µP for a minimum of 140ms after VCC has risen above the reset threshold level. This ensures that the µP has sufficient time to initialize and stabilize before beginning operation. Additionally, the device boasts an impressive low supply current of only 1µA (typical), which contributes to the overall efficiency of the system it is monitoring.

The MAX6315US46D3-T also includes a debounced manual reset input, which allows for a forced reset when necessary. This manual reset capability is an essential feature for systems that require user intervention to recover from a fault condition or to initiate a system restart.

Designed with reliability in mind, the MAX6315US46D3-T incorporates a robust set of features including thermal shutdown and a wide operating temperature range of -40°C to +85°C. This makes it suitable for use in a variety of challenging environmental conditions.

In summary, the Maxim Integrated MAX6315US46D3-T is a versatile and reliable reset circuit that offers critical protection for microprocessors. Its low power consumption, precise monitoring capabilities, and additional safety features make it an excellent choice for designers looking to enhance system reliability in their digital and microprocessor-based applications.