Maxim Integrated MAX6863UK28+T Microprocessor Supervisory Circuit

The MAX6863UK28+T from Maxim Integrated is a highly reliable and robust microprocessor (μP) supervisory circuit designed to monitor power supplies in μP and digital systems. It provides a significant layer of protection by ensuring that the system's voltage levels remain within operational thresholds, thereby safeguarding the system from unpredictable behavior that can arise from power surges, dips, or system failures.

This supervisory circuit operates over a wide voltage range and is optimized for low-power consumption, making it an excellent choice for portable and battery-operated applications. The MAX6863UK28+T is available in a compact SOT-23 package, which is ideal for space-constrained applications where board real estate is at a premium.

One of the key features of the MAX6863UK28+T is its preset factory-trimmed V_CC reset threshold of 2.8V, which caters to a variety of low-voltage applications. The device boasts a ±1.5% reset threshold accuracy over the entire temperature range of -40°C to +125°C, ensuring reliable operation under varying environmental conditions.

The MAX6863UK28+T also includes a manual reset input, which provides a simple and effective way for the system to trigger a reset event externally. This feature is particularly useful for system maintenance or to recover from an error state. The reset output is available in both push-pull and open-drain configurations, providing flexibility in interfacing with other components within a system.

Another notable feature is the device's low supply current of 5.5μA (typical), which helps to minimize power consumption, thereby extending the battery life of portable devices. The supervisory circuit also includes an active-low reset output, which remains asserted for a minimum of 140ms after V_CC has risen above the reset threshold. This ensures that the μP has sufficient time to stabilize before it resumes operation.

In summary, the MAX6863UK28+T from Maxim Integrated is a versatile and reliable supervisory circuit that provides critical monitoring of system voltages to enhance system reliability and prevent data corruption. Its low power consumption, compact form factor, and precision voltage monitoring make it an excellent choice for a wide range of applications, from consumer electronics to industrial control systems.