MAX6340UK31/V+T

Overview

The MAX6340UK31/V+T is a low-power microprocessor supervisor circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors system voltages ranging from 1.6V to 5V and asserts a reset signal when the supply voltage falls below its specific threshold. The device features an active-low, open-drain reset output and utilizes an external capacitor to adjust the reset timeout delay, providing design flexibility. It operates within a temperature range of -40°C to +125°C with a maximum supply voltage of 5.5V and typical quiescent current of 1.6µA.

Feature Summary

• Capacitor-adjustable reset timeout period for flexible timing configuration
• Low quiescent current consumption suitable for power-sensitive applications
• Immune to short voltage transients to prevent false resets
• Guaranteed reset valid down to 1V supply voltage

Applications

• Microprocessor system supervision in industrial equipment
• Automotive electronic control unit monitoring
• Portable battery-powered devices requiring low standby current
• Consumer electronics voltage supervision

Procurement Notes

Verify the exact suffix 'V' against the manufacturer's official documentation to confirm package type and temperature grade specifications. Ensure compatibility with existing PCB footprints for SOT-23-5 packages. Confirm that the open-drain output configuration aligns with the target system's pull-up requirements. Cross-reference the revision history for any pinout or electrical characteristic updates prior to final procurement.

Selection Notes

Select this component when a single-supervisor function with adjustable timeout is required. The open-drain output necessitates an external pull-up resistor, which must be sized according to the load capacitance and desired rise time. Consider the 1.6µA typical quiescent current for battery life calculations. Ensure the monitored voltage range covers the system's operational window without exceeding the 5.5V absolute maximum rating.

Part Context

This part belongs to the MAX6340/MAX642x family of low-power supervisors. It is pin-compatible with certain legacy parts like LP3470 but requires verification of electrical parameters. The family offers multiple output options including push-pull and open-drain configurations across SC70, SOT143, and SOT23 packages.

Replacement Considerations

Publicly confirmed substitutes include NCP300–NCP303, MC33464/MC33465, and LP3470. Verify pinout compatibility and electrical thresholds before substitution. Ensure the replacement supports the required open-drain output and capacitor-adjustable timeout functionality.