MAX6353LSUK+

Overview

The MAX6353LSUK+T is a dual-input voltage supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors two independent supply voltages and asserts active-low reset outputs when inputs fall below preset thresholds. The device features a manual reset input, push-pull outputs, and operates within an extended temperature range of -40°C to +85°C. Key electrical parameters include a maximum supply voltage of 5.5V, a typical quiescent current of 20µA, and a reset delay time of 180ms. Accuracy is specified at 1.5%, with threshold voltages for the LS variant typically around 2.63V and 4.40V.

Feature Summary

• Dual-channel voltage monitoring with factory-set precision thresholds
• Active-low debounced manual reset input compatible with TTL/CMOS logic
• Low power consumption suitable for battery-operated systems
• Push-pull output configuration for robust signal driving

Applications

• Monitoring multiple power rails in embedded microprocessor systems
• Voltage supervision in portable consumer electronics
• Industrial control system power integrity verification
• Automotive electronic module power management

Procurement Notes

Verify component authenticity through authorized distribution channels due to limited availability status. Confirm package marking and datasheet revision alignment during incoming inspection. Ensure storage conditions comply with moisture sensitivity level requirements prior to reflow soldering. Cross-reference ordering part numbers carefully as suffixes may indicate specific tape-and-reel configurations or regional compliance variations.

Selection Notes

Select this component when precise monitoring of two distinct voltage levels is required without external resistor networks. Consider the fixed threshold options available within the MAX6353 series to match target supply voltages. Evaluate the 180ms reset delay against system startup timing requirements. Verify that the SOT-23-5 package footprint aligns with existing PCB layout constraints and thermal dissipation needs.

Part Context

This device belongs to the MAX635x family of microprocessor supervisors designed for enhanced system reliability. It replaces discrete comparator solutions by integrating precision references and hysteresis into a compact surface-mount package. The series offers various threshold combinations to cover standard voltage rails such as 1.8V, 2.5V, 3.3V, and 5V, providing a standardized approach to power sequencing and fault detection.

Replacement Considerations

Direct pin-compatible alternatives within the MAX635x family may offer different threshold voltages or additional features like watchdog timers. Verify functional equivalence regarding reset polarity, output drive capability, and operating temperature range before substitution.