MAX6309UK31D3-T

Supervisors Overview

The MAX6309UK31D3-T is a CMOS microprocessor supervisory circuit designed to monitor multiple power supplies. It features two monitored inputs with factory-programmed thresholds of 3.3V and 5V. The device provides an active low, push-pull reset output with a manual reset input capability. It operates within a supply voltage range up to 5.5V and has a reset delay time of 1.4 ms. The operating supply current is 8 uA. The component is housed in a SOT-23-5 package and supports an industrial temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Monitors two independent power supply inputs for system integrity
• Provides active low push-pull reset signal generation
• Includes manual reset input functionality for user control
• Designed to ignore fast transients on monitored supplies

Supervisors Applications

• Personal computer systems monitoring 5V and 3.3V rails
• Portable applications requiring low supply current
• Microprocessor supervisory circuits
• Multiple-input programmable reset ICs

Supervisors Procurement Notes

Verify the specific suffix D3 against official Analog Devices documentation to confirm lead-free status and RoHS compliance, as suffix variations may indicate different environmental certifications or manufacturing batches. Confirm availability status through authorized distributors, as this part number may be subject to limited supply or end-of-life restrictions. Ensure the source document explicitly identifies Maxim Integrated or Analog Devices as the manufacturer to avoid counterfeit components.

Supervisors Selection Notes

Select this component when dual-supervision of distinct voltage rails is required within a compact footprint. The fixed 3.3V and 5V thresholds make it suitable for standard logic levels without external programming. Consider the 8 uA supply current for battery-sensitive designs. Verify that the push-pull output drive strength meets the load requirements of the target reset line compared to open-drain alternatives.

Supervisors Part Context

This part belongs to the MAX6305–MAX6313 family of 5-pin, multiple-input, programmable reset ICs. These devices are specifically engineered to assert a system reset if any monitored supply falls outside its programmed threshold. The family shares common characteristics such as small SOT-23-5 packaging and transient immunity, differing primarily in factory-programmed threshold voltages and output configurations.

Supervisors Replacement Considerations

Cross-reference with MAX6309EUK31D3+T for lead-free equivalents. Check MAX6306UK31D3-T for similar supervision but note potential differences in output type (open drain vs push-pull) and reset delay times. Verify exact threshold matching with MAX6309 series variants before substitution.