MAX6352LSUK+T

Overview

The MAX6352LSUK+T is a dual-input voltage supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors two power-supply voltages and asserts reset outputs if any input drops below its preset threshold. The device features a debounced manual-reset input, push-pull active-low outputs, and a watchdog timer with a 46.4-second start-up timeout and 2.9-second normal timeout. It operates within a supply voltage range of 1V to 5.5V, consumes 20µA of supply current, and functions across a temperature range of -40°C to +85°C in a SOT-23-5 package.

Feature Summary

• Monitors multiple power-supply voltages and asserts system reset when inputs fall below factory-set thresholds
• Includes a debounced TTL/CMOS-compatible manual-reset input for user-initiated control
• Integrates a watchdog timer with distinct start-up and normal timeout periods
• Provides transient immunity to ignore short power-supply glitches

Applications

• Personal computer systems monitoring 5V and 3.3V supplies
• Portable and battery-powered equipment requiring low power consumption
• Controllers and intelligent instruments
• Multivoltage systems improving reliability over discrete components

Procurement Notes

Verify the specific suffix 'LSUK' against official Maxim Integrated documentation to confirm exact threshold voltages and revision status. Ensure compatibility with the required operating temperature range and package type. Confirm RoHS compliance and lead-free status as indicated by the '+' suffix. Cross-reference the datasheet version to validate feature availability such as the watchdog timer configuration.

Selection Notes

Select this component for applications requiring simultaneous monitoring of two distinct voltage rails with high precision. The low 20µA supply current makes it suitable for portable devices where power efficiency is critical. The integrated watchdog timer simplifies design by eliminating external timing components. Ensure the monitored voltages align with the available factory-set threshold options ranging from 2.5V to 5.0V.

Part Context

This part belongs to the MAX635x series of microprocessor supervisory circuits designed to enhance system reliability. These CMOS ICs replace separate supervisor ICs or discrete components by integrating multiple monitoring functions into a small footprint. The series is characterized by guaranteed reset validity down to 1V and immunity to supply transients, making them robust choices for complex digital systems.

Replacement Considerations

Check for direct pin-to-pin replacements within the MAX635x family that match the specific threshold requirements. Verify that alternative parts support the same watchdog timer functionality and output drive capabilities. Ensure the replacement maintains the SOT-23-5 package form factor for board compatibility.