MAX6358MSUT+T

Overview

The MAX6358MSUT+T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors two independent power supply rails, providing active-low open-drain reset outputs when voltages drop below preset thresholds of 4.38 V and 2.93 V. The device features a manual reset input, a watchdog timer with a 180 ms reset delay, and operates within a supply voltage range up to 5.5 V. It maintains accuracy within 1.5% and consumes only 20 µA of supply current. The component is housed in a compact SOT-23-6 package and supports operation across an extended temperature range from -40°C to +85°C.

Feature Summary

• Dual-channel voltage monitoring with precision factory-set thresholds for reliable system supervision
• Integrated watchdog timer with startup timeout and manual reset capability for enhanced fault recovery
• Ultra-low 20 µA supply current consumption suitable for battery-powered applications
• Active-low open-drain reset outputs valid as long as input supplies remain above minimum operating levels

Applications

• Multi-rail embedded systems requiring simultaneous power supply validation
• Portable electronic devices where low quiescent current is critical
• Industrial control units needing robust watchdog timer functionality
• Telecommunications equipment utilizing extended temperature range components

Procurement Notes

Verify the specific suffix 'MSUT' against official Analog Devices documentation to confirm pinout and threshold specifications. Confirm RoHS compliance status through the manufacturer's latest datasheet revision. Check availability constraints as distribution channels may report limited stock or end-of-life statuses. Ensure the ordering part number matches the required voltage thresholds and package type exactly before procurement.

Selection Notes

Select this component when dual-supervision is required without chip enable signals. Compare threshold voltages against target rail specifications to ensure proper reset assertion timing. Consider the open-drain output configuration for compatibility with downstream logic levels. Evaluate the 180 ms reset delay against system startup requirements to prevent premature initialization errors during power ramp-up phases.

Part Context

The MAX6358 belongs to the Maxim Integrated MAX635x series of dual/triple-voltage microprocessor supervisors. This family improves system reliability by integrating multiple reset functions into a single small footprint compared to discrete solutions. The MAX6358 specifically targets applications needing two monitored inputs with watchdog capabilities, distinguishing it from variants like the MAX6356 which offers three monitored inputs but different output configurations.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify functional equivalence with other MAX635x series variants such as MAX6358LSUT+T or MAX6358LTUT+T based on specific threshold voltage requirements and package compatibility.