MAX6430FGUS+T

Overview

The MAX6430FGUS+T is a microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within an input voltage range of 1.2V to 5.5V and provides a fixed reset threshold of 2.938V. The device features a manual reset input with an extended setup period to prevent nuisance resets from short switch closures. It asserts the reset output when monitored supply voltages drop below the specified threshold and remains asserted for a timeout period after supplies exceed thresholds. The component is available in a 6-pin SOT-23 package.

Feature Summary

• Features a debounced manual reset input with an extended setup period to ignore short switch closures
• Asserts reset output when monitored supply voltages drop below the specified threshold
• Maintains reset assertion for a defined timeout period after all monitored supplies exceed their reset thresholds

Applications

• Microprocessor (µP) and digital system power supply monitoring
• Circuits requiring reliable reset generation with manual override capability
• Systems needing protection against nuisance resets from transient switch events

Procurement Notes

Verify the specific suffix 'FGUS' against official datasheets to confirm pinout, thermal characteristics, and exact threshold voltage. Ensure compatibility with existing PCB footprint and soldering profiles. Confirm RoHS compliance status as indicated by the '+' suffix. Cross-reference with manufacturer documentation for any recent product change notices or obsolescence alerts before finalizing procurement plans.

Selection Notes

Select this component when a fixed 2.938V reset threshold is required for low-voltage systems. Consider the manual reset feature if user intervention is needed. Evaluate the SOT-23 package size constraints against board space limitations. Compare against other MAX64xx variants if adjustable thresholds or different timeout periods are necessary for the specific application requirements.

Part Context

The MAX6430 belongs to the MAX6430-MAX6437 family of ultra-low-voltage, low-power microprocessor reset circuits. These devices are designed to monitor supply voltages in 1.8V to 3.3V systems. The family shares common functional characteristics, including manual reset inputs and extended setup periods, differing primarily in reset threshold voltages and package options. This specific part is optimized for applications requiring precise supervision at lower voltage levels.

Replacement Considerations

Check for direct substitutes within the MAX643x series with compatible threshold voltages. Verify pin-to-pin compatibility with alternative packages like SOT-23-5 if space allows. Consult manufacturer cross-reference lists for updated components replacing older revisions. Ensure electrical specifications match exactly before substitution.