MAX6358TWUT-T

Overview

The MAX6358TWUT-T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors two input supply voltages with factory-set thresholds of 1.67V and 3.08V. The device features active-low, open-drain reset outputs that are asserted if any monitored voltage drops below its threshold. It includes a debounced manual reset input and a watchdog timer with a 46.4s startup timeout and a 2.9s normal timeout period. The IC operates over an extended temperature range of -40°C to +85°C and draws a typical supply current of 20µA.

Feature Summary

• Monitors multiple power-supply voltages with precision factory-set thresholds
• Includes a watchdog timer with specified startup and normal timeout periods
• Features a debounced manual reset input compatible with TTL/CMOS logic

Applications

• Embedded systems requiring reliable power supervision
• Microprocessor-based designs needing multi-voltage monitoring
• Industrial control units operating in extended temperature environments

Procurement Notes

Verify the exact suffix against official datasheets, as variations like LTUT or TWUT may indicate different thermal grades or packaging options. Confirm availability status, as some variants are marked as obsolete or discontinued. Ensure the selected part matches the required voltage thresholds and package type for your specific PCB layout and system requirements before ordering.

Selection Notes

Select this component when dual-voltage supervision with watchdog functionality is required. Compare threshold voltages (1.67V, 3.08V) against system rails to ensure proper triggering. Consider the SOT-23-6 package size for space-constrained designs. Verify that the open-drain output configuration aligns with the downstream logic interface requirements.

Part Context

This part belongs to the MAX6351–MAX6360 family of dual/triple-voltage microprocessor supervisors. These devices improve system reliability by replacing discrete components with integrated solutions. The series offers various threshold combinations and output configurations, including push-pull and open-drain options, to suit diverse application needs.

Replacement Considerations

Check for direct substitutes within the MAX635x family with matching thresholds and package types. Verify pin compatibility and electrical specifications before swapping. Note that some variants may be obsolete; consult manufacturer lifecycle notices for long-term sourcing viability.