LTC2919CMS-2.5#PBF

Supervisors Overview

The LTC2919CMS-2.5#PBF is a precision, low-power voltage supervisor from Analog Devices Inc., featuring an adjustable reset threshold and a built-in manual reset input. It operates within a supply voltage range of 1.25V to 5.5V, with the CMS-2.5 variant providing a fixed 2.5V trip point. The device includes a watchdog timer with a timeout period selectable via external components or fixed options. It utilizes a SOT-23-6 package, ensuring compact integration in space-constrained designs while maintaining high accuracy for system monitoring.

Supervisors Feature Summary

• Provides precise supervision of power supply voltages with a fixed 2.5V threshold
• Integrates a manual reset input for controlled system restarts
• Includes a configurable watchdog timer to detect software failures
• Operates with ultra-low quiescent current for battery-powered applications

Supervisors Applications

• Portable electronic devices requiring reliable power management
• Embedded systems needing automatic recovery from brown-out conditions
• Industrial control units utilizing watchdog functionality for fault detection
• Battery-operated equipment where low standby current is critical

Supervisors Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free packaging compliant with RoHS standards. Confirm the 'CMS-2.5' designation matches the required 2.5V trip point for your circuit design. Ensure the SOT-23-6 footprint aligns with your PCB layout constraints. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing specifications.

Supervisors Selection Notes

Select this component when a fixed 2.5V reset threshold is required rather than an adjustable one. Consider the SOT-23-6 package size if board space is limited compared to larger packages. Evaluate the need for a manual reset feature alongside automatic supervision. Verify that the operating voltage range of 1.25V to 5.5V covers your system's nominal and transient voltage levels.

Supervisors Part Context

This part belongs to the LTC291x family of voltage supervisors, designed for monitoring single or multiple power rails. The CMS-2.5 variant specifically fixes the reset threshold at 2.5V, simplifying design calculations for systems operating near this level. It complements other variants in the series that offer adjustable thresholds or different package options, providing flexibility across various application requirements.

Supervisors Replacement Considerations

Direct replacements may include other LTC291x variants with similar pinouts but verify the reset threshold matches the 2.5V requirement. Check for equivalent parts from other manufacturers offering comparable quiescent current and watchdog features. Ensure any substitute supports the same SOT-23-6 package and manual reset functionality if those are critical to the design.