Maxim Integrated MAX6866UK26D3L-T Microprocessor Reset Circuit

The MAX6866UK26D3L-T is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 2.63V voltage threshold. This component is particularly suitable for portable, battery-powered equipment due to its low power consumption and small size.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset voltage threshold, providing ample time for the system to stabilize. The MAX6866UK26D3L-T operates with a supply voltage range from 1.2V to 5.5V, making it versatile for various applications.

The device comes in a small, 5-pin SOT23 package, which is ideal for space-constrained applications. Its lead(Pb)-free finish and RoHS compliance ensure that it meets current environmental standards for electronic components. Moreover, the MAX6866UK26D3L-T features an active-low, push-pull reset output, which provides a direct interface to the reset pin of the microprocessor without requiring an external transistor.

Key features of the MAX6866UK26D3L-T include:

• Factory-trimmed VCC reset threshold at 2.63V
• Immune to short VCC transients
• Low power consumption, suitable for battery-powered devices
• Guaranteed reset valid to VCC = 1.0V
• 140ms (min) reset timeout period
• Low supply current of 6µA (typ)
• Operating temperature range: -40°C to +85°C

With its precision voltage monitoring and robust reset features, the MAX6866UK26D3L-T is an essential component for ensuring the reliable operation of microprocessor-based systems. Whether it's in consumer electronics, computers, controllers, or other digital applications, this reset circuit from Maxim Integrated provides the security and stability needed for effective system management.