Maxim Integrated's MAX6315US45D3+T: A Robust Low-Power Microprocessor Reset Circuit

The MAX6315US45D3+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a crucial function by asserting a reset signal whenever the VCC supply voltage drops below a preset threshold, ensuring that the µP and its peripherals are reset properly during power-up, power-down, and brown-out conditions. This reset signal maintains the system integrity by preventing code execution errors during inadequate power supply levels.

With a factory-trimmed reset threshold voltage set at 4.5V, the MAX6315US45D3+T is tailored for systems that operate at 5V power supply levels. The device features an active-low RESET output, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level. This ensures that the system has sufficient time to stabilize before the processor starts its operation.

One of the key attributes of the MAX6315 is its low power consumption, drawing less than 1µA of supply current. This makes it an ideal choice for power-sensitive applications, including portable, battery-operated devices. The device's tiny SOT-143 package allows for space-saving on PCB layouts, which is particularly beneficial in compact electronic products.

The MAX6315US45D3+T features integrated glitch immunity, ensuring that the output remains in the correct state during transient conditions on the VCC line, which is critical for maintaining system reliability. It is designed to operate over a wide temperature range of -40°C to +85°C, making it suitable for industrial applications with harsh environmental conditions.

Maxim Integrated's commitment to quality is evident in the MAX6315US45D3+T, which is designed with an array of protections to enhance system reliability. The device is shipped in tape and reel form, denoted by the "+T" suffix, facilitating efficient handling and placement during automated manufacturing processes. Whether used in microcontrollers, computers, controllers, or other digital systems, the MAX6315US45D3+T offers a robust solution for managing system resets with precision and reliability.