MAX6309UK42D3

Supervisors Overview

The MAX6309UK42D3 is a CMOS microprocessor supervisory circuit designed to monitor multiple power supplies. It features a factory-programmed reset threshold voltage of 4.2V and includes a manual reset input. The device operates within an extended temperature range of -40°C to +85°C and consumes low supply current, making it suitable for portable applications. It is housed in a compact SOT-23-5 package.

Supervisors Feature Summary

• Monitors more than one power supply and asserts system reset if any monitored supply falls outside the programmed threshold
• Specifically designed to ignore fast transients on any monitored supply
• Features a manual reset input for external control

Supervisors Applications

• Monitoring both 5V and 3.3V supplies in personal computer systems
• Portable applications requiring low supply current
• Microprocessor supervisory circuits

Supervisors Procurement Notes

Verify the specific suffix D3 indicates the 4.2V threshold variant. Confirm the manufacturer source is Maxim Integrated or Analog Devices Inc. Ensure the package matches the SOT-23-5 specification. Check RoHS compliance status as datasheets may vary by production batch.

Supervisors Selection Notes

Select this component when monitoring multiple rails with a fixed 4.2V threshold is required. Consider the SOT-23-5 package size for space-constrained designs. Verify that the manual reset input functionality meets system requirements. Ensure the operating temperature range covers the application environment.

Supervisors Part Context

Part of the MAX6305–MAX6313 family of 5-pin, multiple-input, programmable reset ICs. These devices are optimized for monitoring various power supplies in embedded systems. The family offers factory-programmed thresholds from 2.5V to 5.0V in 100mV increments.

Supervisors Replacement Considerations

Other variants in the MAX6305–MAX6313 series offer different reset thresholds. Verify that alternative part numbers match the required 4.2V threshold and SOT-23-5 package. Cross-reference pinouts and electrical characteristics before substitution.