MAX6468US26D3+T

Overview

The MAX6468US26D3+T is a microprocessor supervisory reset circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors single power-supply voltages ranging from +1.8V to +5.0V and asserts a reset signal if the supply voltage drops below its preset threshold of 2.63V. The device features an edge-triggered, one-shot manual reset function that ensures the microprocessor enters reset mode for a fixed timeout period only. Key electrical parameters include a maximum supply voltage of 5.5V, a reset delay time of 225ms, and a quiescent current of 7uA. It operates within a temperature range of -40°C to +125°C and utilizes an SOT-143-4 package.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents continuous reset assertion during held manual reset conditions.
• Factory-trimmed threshold voltage eliminates the need for external components.
• Active-low push-pull output provides robust drive capability for microprocessor reset lines.

Applications

• Microprocessor (µP) supervisory circuits
• Single power-supply monitoring systems
• Embedded systems requiring reliable reset generation

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status (+ suffix indicates lead-free). Check current availability as lifecycle status may vary. Ensure ordering suffix matches required package and temperature grade specifications.

Selection Notes

Select this part for applications requiring a fixed 2.63V threshold with active-low push-pull output. Consider the 225ms reset delay and 7uA quiescent current against system power and timing requirements. Verify compatibility with the target microprocessor's reset input characteristics and operating voltage range.

Part Context

Part of the MAX6467/MAX6468 family of microprocessor supervisory circuits. Designed to improve system reliability compared to traditional manual reset circuits. Offers various factory-trimmed threshold options to accommodate different supply voltages and tolerances without external components.

Replacement Considerations

MAX6468US26D3+ (non-tape reel version). Cross-reference with other MAX6468 variants for different threshold voltages or packages if 2.63V is not suitable.