MAX6309UK42D3+

Supervisors Overview

The MAX6309UK42D3+T is a CMOS microprocessor supervisory circuit designed to monitor multiple power supplies. It asserts a system reset if any monitored supply falls outside the programmed threshold, specifically ignoring fast transients. The device features a manual reset input and operates within an extended temperature range of -40°C to +85°C. It is housed in a compact SOT-23-5 package with a maximum operating voltage of 5.5V.

Supervisors Feature Summary

• Monitors more than one power supply simultaneously
• Asserts system reset when supplies fall outside programmed thresholds
• Ignores fast transients on monitored supplies
• Includes manual reset input functionality

Supervisors Applications

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

Supervisors Procurement Notes

Verify RoHS compliance status as suffixes indicate lead-free (+) or leaded variants. Confirm the specific reset threshold voltage associated with the '42' code against official datasheets. Ensure the package type matches the required footprint for PCB design. Check availability status as some distributors may list limited stock.

Supervisors Selection Notes

Select this component for designs requiring multi-supervision of critical voltage rails. The fixed factory-programmed threshold eliminates external resistor networks. Consider the SOT-23-5 package size for space-constrained portable electronics. Verify that the manual reset pin meets system control requirements.

Supervisors Part Context

Part of the MAX6305–MAX6313 family of 5-pin, multiple-input, programmable reset ICs from Maxim Integrated. These devices are optimized for monitoring dual voltage rails common in PC architectures while maintaining low quiescent current suitable for battery-powered operation.

Supervisors Replacement Considerations

Cross-reference with other MAX6309 variants differing only in reset threshold voltage codes (e.g., UK34, UK46). Verify package compatibility between SOT-23-5 and alternative footprints if substituting.