MAX6359MSUT+

Overview

The MAX6359MSUT+T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range of 1.2V to 5.5V and features two monitored inputs with threshold voltages of 3.08V and 4.63V. The device provides an active-low, push-pull reset output referenced to VCC1, with a reset delay time of 180ms. It includes a manual reset input and a watchdog timer. The component is housed in a SOT-23-6 package, offers 1.5% accuracy, and consumes 20µA of supply current. It functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Monitors multiple power-supply voltages with precision factory-set thresholds to improve system reliability.
• Integrates a watchdog timer with defined startup and normal timeout periods for fault detection.
• Features a debounced manual reset input compatible with TTL/CMOS logic levels.

Applications

• Embedded systems requiring multi-rail power supervision
• Industrial control units needing watchdog protection
• Portable devices utilizing low-current monitoring

Procurement Notes

Verify the specific suffix 'MS' against official datasheets to confirm the exact voltage thresholds and temperature grade, as these parameters vary significantly across the MAX6359 family. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer, as availability may be restricted. Ensure the SOT-23-6 footprint matches your PCB design requirements before finalizing procurement.

Selection Notes

Select this component when precise monitoring of two distinct voltage rails is required alongside watchdog functionality. The 20µA supply current makes it suitable for battery-operated applications. Verify that the 3.08V and 4.63V thresholds align with your system's power rails. Consider the 180ms reset delay and the active-low push-pull output characteristics for compatibility with your microprocessor reset interface.

Part Context

The MAX6359 belongs to the Maxim Integrated MAX6351–MAX6360 series of microprocessor supervisors. This family is designed to replace discrete components, offering improved accuracy and reliability. The MAX6359 specifically monitors two voltages and includes a watchdog timer, distinguishing it from variants like the MAX6356 which monitors three voltages without a watchdog.

Replacement Considerations

Check for MAX6359LTUT+T or MAX6359SVUT+T if different voltage thresholds are needed. Verify pinout compatibility with other SOT-23-6 supervisor ICs from the same family before substitution.