MAX6424UK31

Supervisors Overview

The MAX6424UK31 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 of 2.625V. The device features an active-low, push-pull reset output and utilizes a capacitor-adjustable reset timeout delay of 4.375ms. Packaged in a compact SOT-23-5 surface-mount format, it operates within a temperature range of -40°C to +125°C with a maximum supply voltage of 5.5V.

Supervisors Feature Summary

• Capacitor-adjustable reset timeout period for flexible timing configuration
• Active-low push-pull reset output ensuring robust drive capability
• Guaranteed reset valid down to VCC = 1V for reliable operation at low voltages

Supervisors Applications

• Portable equipment requiring strict power monitoring
• Battery-powered computers and embedded controllers
• Automotive and medical instrumentation systems
• Critical microprocessor supervision in intelligent instruments

Supervisors Procurement Notes

Verify component authenticity through authorized distributors due to potential obsolescence status. Confirm RoHS compliance and lead-free specifications against current manufacturing declarations. Validate package marking codes and pinout configurations to ensure compatibility with existing PCB footprints. Check for recent product change notices regarding material or process updates that may affect long-term availability.

Supervisors Selection Notes

Select this component when an active-low push-pull output is required rather than open-drain variants. Ensure the external capacitor value aligns with the desired 4.375ms timeout specification. Verify that the 2.625V threshold matches the target system voltage rail. Consider the SOT-23-5 footprint constraints during layout design to maintain thermal and electrical performance standards.

Supervisors Part Context

This part belongs to the MAX6340/MAX6421–MAX6426 family of low-power supervisors. These circuits share common architectural features including capacitor-adjustable timeouts and immunity to short transients. The MAX6424 variant specifically provides a push-pull output, distinguishing it from open-drain counterparts like the MAX6423 or MAX6425 within the same series.

Supervisors Replacement Considerations

Pin-compatible alternatives include NCP300–NCP303, MC33464/MC33465, S807/S808/S809, and RN5VD series devices. Verify threshold voltage and output type compatibility before substitution. Cross-reference datasheets for differences in quiescent current and operating temperature ranges.