MAX6309UK42D3-T

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 configured with a 4.2V reset threshold voltage. The device features a manual reset input and operates within an industrial temperature range of -40°C to +85°C. Packaged in a compact SOT-23-5 outline, it supports a maximum supply voltage of 5.5V and includes factory-programmed thresholds from 2.5V to 5.0V in 100mV increments.

Supervisors Feature Summary

• Monitors more than one power supply and asserts system reset if any monitored supply falls outside the programmed threshold
• 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 in personal computer systems
• Portable applications requiring low supply current and small package size

Supervisors Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm lead-free status by checking for '+' designation; this part number lacks the plus sign, indicating non-lead-compliant composition. Ensure compatibility with the SOT-23-5 footprint and validate the 4.2V threshold requirement against system specifications before procurement.

Supervisors Selection Notes

Select this component when monitoring multiple rails requires a single IC solution with a fixed 4.2V threshold. The SOT-23-5 package suits space-constrained designs. Verify that the non-lead-compliant nature meets regulatory requirements for the target application environment.

Supervisors Part Context

Part of the MAX6305–MAX6313 family of 5-pin, multiple-input, programmable reset ICs manufactured by Maxim Integrated (now Analog Devices). These devices are optimized for portable applications due to low supply current and small package size.

Supervisors Replacement Considerations

Other MAX6309 variants with different threshold voltages or packaging options may serve as substitutes if electrical parameters align.