MAX6355MTUT

Overview

The MAX6355MTUT+T is a dual/triple-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors up to three input supply voltages and asserts active-low, open-drain reset outputs when any voltage drops below its preset threshold. The device operates within a supply voltage range of 1.2V to 5.5V and features a manual reset input with debouncing. It includes a watchdog timer option in related variants, though the MAX6355 specifically lacks this feature. The circuit provides precision factory-set thresholds with 1.5% accuracy and consumes only 20µA of supply current. It is available in a compact SOT-23-6 package and 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
• Provides active-low, open-drain reset outputs for system reliability
• Includes a debounced manual-reset input compatible with TTL/CMOS logic
• Operates with low supply current consumption suitable for battery-powered applications

Applications

• Microprocessor (µP) system supervision
• Dual or triple voltage monitoring in embedded systems
• Portable electronic devices requiring low power consumption
• Industrial control systems operating in extended temperature environments

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm RoHS compliance status and specific suffix variations against official datasheets before procurement. Check for obsolescence notices as some variants may be discontinued. Ensure packaging format matches production requirements. Validate electrical parameters against application needs prior to ordering.

Selection Notes

Select this component when precise monitoring of two or three distinct voltage rails is required without the need for a watchdog timer. Consider the open-drain output configuration for compatibility with various logic families. Evaluate the 1.5% threshold accuracy against system tolerance requirements. Ensure the SOT-23-6 package fits the PCB layout constraints. Verify that the 180ms reset delay meets the startup timing specifications of the monitored microprocessor.

Part Context

The MAX6355 belongs to the MAX6351–MAX6360 family of dual/triple-voltage µP supervisory circuits designed to improve system reliability over discrete solutions. These devices simplify design by integrating multiple voltage monitors into a single IC. The MAX6355 variant specifically focuses on triple-voltage monitoring without a watchdog timer, distinguishing it from other family members like the MAX6358 which includes watchdog functionality. This family shares common features such as low power consumption and extended temperature operation.

Replacement Considerations

Direct substitutes include other MAX6355 variants with different threshold voltages or packages, such as MAX6355MRUT+T or MAX6355TZUT+T. Cross-referencing with similar Maxim Integrated supervisor ICs requires verifying identical pinouts, output types, and threshold levels. Ensure replacement parts maintain the same SOT-23-6 footprint and electrical characteristics.