Maxim Integrated MAX6863UK17+T Microprocessor Reset Circuit

The MAX6863UK17+T from Maxim Integrated is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 1.7V-powered circuits.

This device is particularly well-suited for portable and battery-powered applications due to its low power consumption and small footprint. It ensures that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. The reset output remains asserted for a preset timeout period after V<sub>CC has risen above the reset voltage threshold, providing a stable system reset.

The MAX6863UK17+T features a factory-trimmed reset threshold suitable for lower voltage applications, and it is capable of asserting a reset signal if the supply voltage drops below the preset threshold. This reset signal ensures that the connected microprocessor starts operating correctly once the supply voltage returns to an acceptable level.

Key features of the MAX6863UK17+T include:

• Precision factory-set V<sub>CC reset thresholds
• Immune to short V<sub>CC transients
• Low, 1µA supply current
• Guaranteed reset valid to V<sub>CC = 1V
• 150ms min reset timeout period
• Small, 5-pin SOT23 package

With its built-in debounce circuitry, the MAX6863UK17+T is highly resistant to spurious resets due to noise or interference, ensuring stable operation of the end application. The device is available in a tiny 5-pin SOT23 package, making it ideal for space-constrained applications.

Maxim Integrated's commitment to high-quality and reliability makes the MAX6863UK17+T an excellent choice for critical applications that require a high level of precision in monitoring power supply conditions, such as handheld devices, portable media players, and other battery-operated electronics.