MAX6309UK44D3+T

Supervisors Overview

The MAX6309UK44D3+T is a CMOS microprocessor supervisory circuit designed to monitor multiple power supplies. It operates within a supply voltage range of 1.8 V to 5.5 V and features a fixed reset threshold of 4.375 V with an overvoltage threshold of 4.484 V. The device provides an active low, push-pull output and includes a manual reset input. It has a reset delay time of 225 ms and consumes only 7 uA of quiescent current. Packaged in a SOT-23-5 surface-mount format, it supports operation from -40°C to +85°C.

Supervisors Feature Summary

• Monitors multiple power supplies and asserts system reset if any monitored supply falls outside the programmed threshold
• Features a manual reset input for user-initiated system control
• Designed to ignore fast transients on any monitored supply line

Supervisors Applications

• Monitoring 5V and 3.3V power rails in personal computer systems
• Portable applications requiring low supply current consumption
• Microprocessor (µP) supervisory circuits

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead-free specifications against the official datasheet. Check for obsolescence notices as availability may be limited. Ensure the SOT-23-5 package matches design requirements. Validate electrical parameters such as threshold voltage and quiescent current against application needs.

Supervisors Selection Notes

Select this component when monitoring multiple voltage rails is required in a compact footprint. The 7 uA quiescent current makes it suitable for battery-powered portable devices. The manual reset feature allows for external control. Verify that the 4.375 V threshold aligns with the specific supply rail being monitored. Consider the SOT-23-5 package size for space-constrained PCB layouts.

Supervisors Part Context

Part of the MAX6305–MAX6313 series of 5-pin, multiple-input, programmable reset ICs. These devices are specifically engineered for microprocessor supervision in environments where transient immunity and low power consumption are critical. The series offers various factory-programmed thresholds to accommodate different standard voltage levels without external components.

Supervisors Replacement Considerations

Cross-reference with other members of the MAX6305–MAX6313 family for alternative threshold voltages or package options. Verify pin compatibility and electrical characteristics before substitution.