MAX6359TWUT

Overview

The MAX6359TWUT+T is a dual/triple-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1.2V to 5.5V and features an active-low, push-pull reset output referenced to VCC1. The device monitors two input voltages with specific threshold levels of 3.08V and 4.63V, and overvoltage thresholds of 3.14V and 4.72V. It includes a manual reset input and a watchdog timer with a 46.4s startup timeout and 2.9s normal timeout. The reset delay time is 180ms, and the quiescent supply current is 20µA. Accuracy is specified at 1.5%. The component is housed in a SOT-23-6 package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides precision monitoring for multiple power-supply voltages using factory-set reset thresholds.
• Integrates a watchdog timer input with defined startup and normal timeout periods for system reliability.
• Features a debounced, TTL/CMOS-compatible manual reset input for user-initiated control.

Applications

• Monitoring critical power rails in embedded systems requiring dual or triple voltage supervision
• Ensuring system stability in industrial equipment through integrated watchdog functionality
• Protecting microprocessor-based designs from undervoltage conditions via precise threshold detection

Procurement Notes

Verify the complete part number suffix, as variations such as LTUT, SVUT, or MSUT indicate different temperature grades or specific voltage thresholds. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may be restricted. Ensure the selected variant matches the required voltage thresholds and package type for your specific design implementation.

Selection Notes

Select this component when simultaneous monitoring of two distinct voltage rails is required alongside watchdog protection. The low 20µA supply current makes it suitable for battery-operated applications. Verify that the specific threshold voltages (e.g., 3.08V/4.63V) align with your system's power rail specifications before integration.

Part Context

This device belongs to the MAX6351–MAX6360 series of microprocessor supervisory circuits. These components are designed to improve system reliability by providing multiple reset outputs referenced to different supply voltages. The series utilizes small SOT23 packages and offers extended temperature operation, addressing the need for compact, accurate power management in modern electronic designs.

Replacement Considerations

Check for other variants within the MAX6359 family, such as MAX6359LTUT+T or MAX6359SVUT+T, which may offer different temperature ratings or threshold configurations. Ensure any substitute maintains the same SOT-23-6 footprint and electrical characteristics, including the 180ms reset delay and watchdog functionality.