Maxim Integrated MAX6864UK29D3S Microprocessor Reset Circuit

The MAX6864UK29D3S is a compact, highly reliable microprocessor (µP) supervisory circuit designed and manufactured by Maxim Integrated. This precision device is engineered to monitor power supplies in digital systems, providing a robust solution for system reset during power-up, power-down, and brownout conditions. Its primary function is to ensure that the µP and its peripherals are reset properly, preventing any malfunction due to inadequate supply voltages.

One of the standout features of the MAX6864UK29D3S is its factory-set reset threshold voltage of 2.93V, which is ideal for 3V systems. This threshold precision is maintained over temperature, ensuring consistent performance. The device is capable of asserting a reset signal whenever the VCC supply voltage falls below this preset threshold, keeping the reset active for a minimum of 140ms after VCC rises above the reset threshold. This ensures that the µP has sufficient time to stabilize before resuming operation.

The MAX6864UK29D3S comes in a tiny SOT23-5 package, making it an excellent choice for space-constrained applications. Its low power consumption is an added benefit, drawing only 6µA of supply current, which is particularly valuable for portable and battery-operated devices where power efficiency is paramount.

Additional features of the MAX6864UK29D3S include a debounced manual reset input, which allows for a forced reset when needed. This input can be triggered by an external pushbutton or logic signal, providing flexibility and control to the system designers. The device also offers an active-low reset output, which is compatible with a wide range of microprocessors and other digital ICs.

Overall, the MAX6864UK29D3S is a robust, reliable solution for system monitoring and reset control, ensuring that digital systems operate reliably within their voltage specifications. Its combination of precision, low power, and small footprint makes it an excellent choice for a variety of applications, including portable devices, embedded systems, and IoT devices where consistent and reliable operation is critical.