MAX6354LSUK+T

Overview

The MAX6354LSUK+T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors two power supplies with factory-set thresholds of 3.08V and 4.63V, asserting active-low push-pull reset outputs when voltages drop below these levels. The device operates within a supply voltage range up to 5.5V and maintains an accuracy of 1.5%. It features a manual reset input and a fixed reset delay time of 180ms. Designed for surface-mount installation in SOT-23-5 packages, it supports an operating temperature range from -40°C to +85°C while consuming only 20µA of supply current.

Feature Summary

• Monitors multiple power-supply voltages with precision factory-set thresholds
• Asserts system reset if any monitored supply falls outside programmed limits
• Includes debounced TTL/CMOS-compatible manual-reset input
• Provides power-supply transient immunity without external components

Applications

• Personal computer systems monitoring 5V and 3.3V rails
• Intelligent instruments requiring multi-voltage supervision
• Controllers in multivoltage embedded systems
• Portable and battery-powered equipment

Procurement Notes

Verify the specific suffix 'LS' against official Maxim Integrated documentation, as standard listings typically reference 'LT'. Confirm availability status directly with authorized distributors, as stock levels fluctuate. Ensure the package type matches the required SOT-23-5 footprint. Validate RoHS compliance requirements for your manufacturing process before ordering.

Selection Notes

Select this component when precise monitoring of two distinct voltage rails is required without external resistors. The fixed thresholds simplify design compared to programmable supervisors. Consider the 180ms reset delay and low quiescent current for battery-sensitive applications. Verify that the active-low output polarity aligns with the target microprocessor's reset pin requirements.

Part Context

This part belongs to the MAX635x series of CMOS microprocessor supervisory circuits designed to improve system reliability. These devices integrate multiple reset functions into small 5-pin SOT-23 packages, replacing discrete components. The series is optimized for portable applications due to low power consumption and guaranteed performance over temperature ranges.

Replacement Considerations

Check for direct substitutes within the MAX635x family with matching threshold voltages. Verify pin compatibility and output drive capabilities before substitution.