LTC2939CMS#PBF

Power Supply Controllers, Monitors Overview

The LTC2939CMS#PBF is a configurable six-supply monitor featuring an integrated watchdog timer, manufactured by Analog Devices Inc. It operates within a supply voltage range of 1V to 6V and draws a maximum supply current of 80µA. The device provides four fixed preset thresholds (12V, 5V, 3.3V, 1.8V) and two adjustable inputs with a nominal 0.5V threshold. Reset and watchdog timeout periods are programmable via external capacitors, with a maximum reset active time of 4ms. It is housed in a 16-lead MSOP package.

Power Supply Controllers, Monitors Feature Summary

• Configurable monitoring for up to six supply voltages using selectable preset or adjustable thresholds
• Integrated watchdog timer with timeout period adjustable via external capacitor
• Reset assertion timing adjustable through external capacitance connection
• High accuracy voltage thresholds maintained at ±1.5% over the operating temperature range

Power Supply Controllers, Monitors Applications

• Multi-rail processor power supply supervision
• Industrial control system voltage monitoring
• Automotive electronics power integrity verification
• Telecommunications infrastructure equipment protection

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout and electrical characteristics. Ensure the component meets required environmental specifications for the target application. Confirm package dimensions match design constraints before integration.

Power Supply Controllers, Monitors Selection Notes

Select this component when supervising systems requiring up to six distinct voltage rails with integrated fault detection. The adjustable watchdog and reset timers allow customization for specific system recovery requirements. Verify that the 1V to 6V supply range aligns with the primary logic voltage being monitored.

Power Supply Controllers, Monitors Part Context

This part belongs to the LTC2938/LTC2939 family of configurable supply monitors. While the LTC2938 supports four supplies, the LTC2939 extends this capability to six supplies. Both share identical features regarding watchdog functionality, threshold accuracy, and low power consumption profiles.

Power Supply Controllers, Monitors Replacement Considerations

The LTC2938CMS#PBF serves as a functional substitute for applications requiring only four monitored supplies instead of six. Verify that the reduced channel count does not impact system safety requirements.