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 up to 5.5V and features a fixed reset threshold voltage of 4.375V. The device provides an active low, push-pull output and includes a manual reset input for system control. It consumes a typical operating supply current of 8µA and offers a reset delay time of 1.4ms. The component is housed in a compact SOT-23-5 surface-mount package and supports an industrial temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Monitors multiple power supply inputs to assert a system reset if any monitored voltage falls outside the programmed threshold.
• Features a manual reset input allowing for external system control independent of power supply conditions.
• Designed to ignore fast transients on monitored supplies to prevent false reset assertions during normal operation.

Supervisors Applications

• Monitoring dual voltage rails such as 5V and 3.3V in personal computer systems
• Portable electronic applications requiring low supply current consumption
• Microprocessor supervisory circuits requiring transient immunity

Supervisors Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm RoHS compliance status as datasheets may vary by production batch. Ensure the manufacturer designation matches Analog Devices or Maxim Integrated records. Validate that the lead-free marking corresponds with current environmental regulations for the intended region.

Supervisors Selection Notes

Select this component when simultaneous monitoring of multiple voltage rails is required within a single package. The fixed 4.375V threshold suits applications where one rail requires precise supervision while others are monitored comparatively. The SOT-23-5 footprint is suitable for space-constrained designs. Verify that the 8µA quiescent current meets battery life requirements.

Supervisors Part Context

This part belongs to the MAX6305–MAX6313 family of 5-pin, multiple-input, programmable reset ICs. These devices are engineered for microprocessor supervisory applications where monitoring more than one power supply is necessary. The series is characterized by low supply current and small package size, making it ideal for portable electronics and systems requiring robust power management.

Supervisors Replacement Considerations

Cross-reference with other MAX6309 variants having different threshold voltages if the 4.375V level is unsuitable. Check MAX6305–MAX6313 siblings for alternative pinouts or manual reset availability. Verify package compatibility with existing PCB footprints before substitution.