LTC2919HMS-3.3#PBF

Supervisors Overview

The LTC2919HMS-3.3#PBF is a precision supervisory circuit manufactured by Analog Devices Inc., designed for monitoring multiple voltage rails in embedded systems. This specific variant features three monitored inputs with a fixed threshold of 3.3V, suitable for detecting under-voltage and over-voltage conditions. It operates within a supply voltage range up to 6V and delivers an open-drain reset output. The device is housed in a 10-lead MSOP package and supports industrial temperature ranges from -40°C to +85°C, ensuring reliable performance in demanding environments.

Supervisors Feature Summary

• Provides simultaneous monitoring of three independent voltage inputs for comprehensive power system supervision.
• Features a fixed 3.3V threshold setting, eliminating the need for external resistor dividers for standard logic levels.
• Delivers a low-active open-drain reset signal to interface directly with microcontroller reset pins.

Supervisors Applications

• Monitoring main power rails in industrial control systems
• Supervising battery-backed memory circuits in embedded devices
• Ensuring stable operation in multi-rail server infrastructure

Supervisors Procurement Notes

Verify the exact suffix #PBF confirms lead-free compliance and tube packaging when ordering. Confirm the MSOP-10 package availability matches your PCB footprint requirements. Check current stock levels as distribution may vary by region. Ensure the 3.3V fixed threshold aligns with your target rail voltage before finalizing procurement.

Supervisors Selection Notes

Select this part when a fixed 3.3V trip point is required for three channels without external programming components. Compare against adjustable variants like the IMS-2.5 if custom thresholds are needed. Consider the MSOP-10 package size constraints relative to available board space. Verify that the open-drain output capability matches your system's pull-up configuration.

Supervisors Part Context

This component belongs to the LTC2919 family of triple/dual input voltage monitors. It shares functional similarities with other members like the LTC2919CMS-3.3 but differs in package type and operating temperature range. The series is designed for applications requiring precise voltage supervision with minimal external component count.

Supervisors Replacement Considerations

Direct substitutes include other LTC2919 variants with matching 3.3V thresholds and open-drain outputs, such as LTC2919CMS-3.3#TRPBF or LTC2919CDDB-3.3#TRMPBF, provided package compatibility is addressed.