MAX6468XS18D3+

Overview

The MAX6468XS18D3+ is a microprocessor supervisory 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 1.8V. The device features an edge-triggered, one-shot manual reset function that ensures the processor enters reset mode for a fixed timeout period only. It operates within a temperature range of -40°C to +125°C and is housed in a compact SC-70-4 surface-mount package.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents continuous reset assertion
• Monitors single power-supply voltages from +1.8V to +5.0V
• Asserts reset when supply voltage drops below preset threshold
• Improves system reliability compared to traditional manual reset circuits

Applications

• Microprocessor (µP) supervisory systems
• Power supply monitoring circuits
• Embedded system reset management

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and lead times directly with suppliers. Check for obsolescence notices as this part may have limited availability. Ensure packaging specifications match design requirements. Validate datasheet revisions against current production versions.

Selection Notes

Select this component for applications requiring precise voltage monitoring with manual reset capabilities. Consider the fixed 1.8V threshold suitability for specific logic families. Evaluate the SC-70-4 package constraints for PCB layout. Compare operating temperature ranges against environmental conditions. Assess power consumption requirements against available supply rails.

Part Context

This component belongs to the MAX6467/MAX6468 series of microprocessor supervisory circuits. These devices are designed to enhance system reliability by providing accurate voltage monitoring and controlled reset generation. The series offers various factory-trimmed threshold options to accommodate different power supply standards.

Replacement Considerations

MAX6468XS19D3+T: Higher threshold variant. MAX6468XS20D3+: 2.0V threshold option. MAX6468US29D3+: SOT-143 package alternative.