MAX6355SYUT-T

Overview

The MAX6355SYUT-T is a dual/triple-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range of 1.0V to 5.5V and features three monitored inputs with factory-set thresholds, specifically 2.63V and 4.38V for this variant. The device provides active-low, open-drain reset outputs with a fixed 180ms reset delay time. It includes a debounced manual reset input and consumes only 20µA of supply current. Accuracy is specified at 1.5%, and it functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Monitors multiple power-supply voltages simultaneously using precision factory-set thresholds
• Provides active-low open-drain reset outputs valid as long as any input remains above 1.0V
• Includes a debounced manual reset input compatible with TTL/CMOS logic levels

Applications

• Multi-rail embedded system power supervision
• Microprocessor reset generation in industrial control units
• Portable equipment requiring low standby current monitoring

Procurement Notes

Verify the exact suffix configuration against the official datasheet to ensure correct threshold voltages and output types. Confirm availability status as distribution channels may list limited or obsolete stock. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Ensure the SOT-23-6 package compatibility matches your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when simultaneous monitoring of two or three distinct voltage rails is required without external resistors. The open-drain output suits systems needing wired-OR connections or level shifting. Consider the 180ms delay for applications tolerant of startup latency. Verify that the 20µA quiescent current meets battery-life constraints. Ensure the operating temperature range aligns with the environmental conditions of the target deployment.

Part Context

This part belongs to the MAX635x series of microprocessor supervisors designed to improve system reliability. Unlike discrete solutions, these ICs integrate multiple comparators and reset circuits into a compact form factor. The series supports various threshold combinations and output configurations, allowing designers to replace multiple discrete components with a single integrated solution for complex power sequencing needs.

Replacement Considerations

Direct substitutes include other variants within the MAX6355 family with different threshold codes, such as MAX6355MRUT+T. Check pinout compatibility between SOT-23-6 packages. Verify that alternative parts maintain the same active-low open-drain output structure and 180ms reset delay characteristics to ensure functional equivalence in existing designs.