MAX6309UK29D3+T

Supervisors Overview

The MAX6309UK29D3+T is a CMOS microprocessor supervisory circuit designed to monitor power supplies. It operates within a supply voltage range up to 5.5V and features a fixed reset threshold of 2.9V. The device provides an active low, push-pull output with a manual reset input capability. It includes a watchdog timer for system reliability and supports operation across a temperature range of -40°C to +85°C. Packaged in a SOT-23-5 surface-mount format, it draws 8µA of operating current.

Supervisors Feature Summary

• Monitors multiple power supply inputs to assert a system reset if any monitored supply falls outside the programmed threshold.
• Features a manual reset input allowing external control over the reset state.
• Includes an integrated watchdog timer to detect software malfunctions or system hangs.
• Designed to ignore fast transients on monitored supplies to prevent false resets.

Supervisors Applications

• Monitoring dual power rails in personal computer systems
• Portable electronic devices requiring low supply current
• Microprocessor system supervision

Supervisors Procurement Notes

Verify the specific suffix D3 indicates the tape and reel packaging configuration. Confirm the UK package code corresponds to the SOT-23-5 footprint required for your PCB layout. Ensure the component meets RoHS compliance standards for your manufacturing process. Check for obsolescence status as this series may have limited availability from Analog Devices.

Supervisors Selection Notes

Select this part when monitoring multiple voltages with a single IC is required. The fixed 2.9V threshold suits applications where this specific rail needs supervision. The push-pull output drives loads directly without external pull-ups. Consider the 8µA quiescent current for battery-powered designs. Verify that the manual reset pin functionality aligns with the system's recovery strategy.

Supervisors Part Context

This component belongs to the MAX6305–MAX6313 family of 5-pin, multiple-input programmable reset ICs. These devices are engineered for portable applications due to their small SOT-23-5 package and low power consumption. The family offers factory-programmed thresholds ranging from 2.5V to 5.0V in 100mV increments.

Supervisors Replacement Considerations

Other parts in the MAX6305–MAX6313 series offer different fixed thresholds. For example, MAX6309EUK31D3+T provides a 3.08V threshold. MAX6309EUK46D3+T offers a 4.63V threshold. Ensure the replacement matches the required reset voltage and output type.