MAX6357SWUT-T

Overview

The MAX6357SWUT-T is a dual/triple-voltage microprocessor supervisory circuit in a SOT-23-6 package. It monitors multiple power supplies, asserting reset outputs if any input drops below preset thresholds. The device features an active-low debounced manual reset input and operates with supply voltages greater than +1.0V. It offers precision factory-set thresholds for +1.8V, +2.5V, +3.0V, +3.3V, and +5V rails. Key electrical parameters include a 20µA supply current, a minimum 100ms power-on reset pulse width, and operation over the -40°C to +85°C temperature range.

Feature Summary

• Precision monitoring of multiple power-supply voltages including +1.8V, +2.5V, +3.0V, +3.3V, and +5V
• Factory-set power-supply reset thresholds ensure system reliability without external components
• Active-low debounced manual-reset input compatible with TTL/CMOS logic levels

Applications

• Multi-rail embedded systems requiring simultaneous voltage supervision
• Microprocessor-based designs needing precise power-on reset timing
• Portable electronics utilizing low standby current requirements

Procurement Notes

Verify the complete part number against official Analog Devices or Maxim Integrated documentation to confirm specific threshold voltages and package variants. Ensure the suffix matches the required operating temperature range and pin configuration. Cross-reference datasheet revision dates to confirm feature availability, particularly regarding watchdog timer support which may vary within the MAX635x family series.

Selection Notes

Select this component when designing systems that require supervision of two or three distinct voltage rails from a single IC. It is suitable for applications demanding low quiescent current and high accuracy. Consider the specific threshold levels available in the datasheet table to match target supply voltages. Verify that the SOT-23-6 package fits the board layout constraints and thermal requirements of the final assembly.

Part Context

This device belongs to the MAX6351–MAX6360 series of microprocessor supervisors. These circuits improve system reliability compared to discrete solutions by integrating multiple monitoring functions. The series includes variants with watchdog timers and different output configurations. All devices share common features like manual reset inputs and extended temperature operation, providing a standardized approach to power management in compact form factors.

Replacement Considerations

Check the MAX6356 and MAX6358 datasheets for functional equivalents within the same series. Confirm that alternative parts offer identical threshold voltages and package dimensions. Verify compatibility of reset output polarity and manual reset input specifications before substitution.