MAX6421XS48+T

Supervisors Overview

The MAX6421XS48+T is a low-power microprocessor supervisor circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors system voltages ranging from 1V to 5.5V and asserts an active-low, push-pull reset signal when the supply voltage falls below its specific threshold of 4.80V. The device features a fixed reset timeout period of 4.375 ms, which begins after the supply voltage rises above the threshold. It operates with a quiescent current of 2.5 µA and is housed in a compact SC-70-4 surface-mount package.

Supervisors Feature Summary

• Provides reliable system reset protection by monitoring supply voltage levels against a precise threshold
• Features an active-low, push-pull reset output for direct interface with microprocessor reset pins
• Designed for ultra-low power consumption suitable for battery-operated applications

Supervisors Applications

• Microprocessor reset circuits in portable electronic devices
• Voltage supervision in battery-powered instrumentation
• System reset management in embedded control units

Supervisors Procurement Notes

Verify the exact suffix 'S48' corresponds to the 4.80V threshold and 'T' indicates tape-and-reel packaging. Confirm RoHS compliance status via the manufacturer's latest documentation. Ensure the SC-70-4 footprint matches your PCB design constraints. Cross-reference the part number with official Analog Devices distributors to avoid counterfeit components.

Supervisors Selection Notes

Select this component when a fixed 4.80V threshold is required for systems operating between 1V and 5.5V. Choose the SC-70-4 package for space-constrained designs. Consider the 4.375 ms fixed timeout duration to ensure compatibility with the target microprocessor's startup requirements. Verify that the active-low output polarity aligns with the system logic.

Supervisors Part Context

The MAX6421 series includes various supervisors with different thresholds and packages. The MAX6421XS48+T specifically denotes the 4.80V threshold variant in the SC-70-4 package. Other variants in the family may offer adjustable timeouts or different output polarities. This part belongs to the broader category of low-power microprocessor supervisors designed for voltage monitoring.

Supervisors Replacement Considerations

Check for MAX6421XS48 (without +T) if reel packaging is not required. Verify if other threshold variants like MAX6421XSxx are compatible with adjusted system voltages. Ensure any substitute maintains the same SC-70-4 footprint and active-low push-pull output characteristics.