MAX6359MSUT

Overview

The MAX6359MSUT+T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors two independent power-supply voltages and asserts an active-low, push-pull reset output when either input drops below its preset threshold. The device features a manual reset input and a watchdog timer with specified startup and timeout periods. It operates within a supply voltage range up to 5.5 V and maintains accuracy of 1.5%. Key electrical parameters include threshold voltages of 3.08 V and 4.63 V, overvoltage thresholds of 3.14 V and 4.72 V, a reset delay of 180 ms, and a quiescent current of 20 µA. It is housed in a SOT-23-6 package and functions across an extended temperature range from -40°C to +85°C.

Feature Summary

• Dual-input voltage monitoring with factory-set precision thresholds for reliable system supervision
• Integrated watchdog timer with defined startup and operational timeout periods
• Active-low push-pull reset output referenced to the primary supply rail
• Debounced manual reset input compatible with TTL/CMOS logic levels

Applications

• Multi-rail embedded systems requiring simultaneous voltage supervision
• Microprocessor-based designs needing watchdog functionality
• Industrial control units operating in extended temperature environments

Procurement Notes

Verify the complete ordering part number, including suffixes such as +T or +TR, against official manufacturer documentation to ensure correct packaging and RoHS compliance. Confirm availability status directly with authorized distributors, as supply constraints may apply. Cross-reference the specific threshold voltage codes to match design requirements precisely.

Selection Notes

Select this component when dual voltage rails require synchronized reset assertion under fault conditions. Ensure the monitored voltages align with the available factory-set threshold options. Verify that the required reset delay and watchdog timing specifications meet the system's stability criteria. Confirm package compatibility with the target PCB layout.

Part Context

This device belongs to the MAX635x series of microprocessor supervisory circuits designed to enhance system reliability. These components replace discrete monitoring solutions by integrating multiple voltage supervisors into a single compact package. The series offers various threshold combinations and package options to accommodate diverse multi-voltage architectures.

FAQ

What is the reference point for the reset output?

The reset output is active-low, push-pull, and referenced to VCC1.

Does the device support battery backup switching?

No, the MAX6359 does not include a battery backup switch feature.