LTC2909IDDB-5#TRPBF

Supervisors Overview

The LTC2909IDDB-5#TRPBF is a precision supervisory circuit manufactured by Analog Devices Inc. It functions as a triple/dual input under-voltage, over-voltage, and negative voltage monitor. The device features an open-drain output with a low-active reset signal and a fixed 200 ms reset delay time. It operates within a supply voltage range of up to 6 V and maintains an accuracy of 1.5%. The component supports adjustable thresholds for two channels while providing a fixed threshold for the third. It is designed for surface mount installation in an 8-WFDFN package with a bare pad, suitable for applications requiring precise power monitoring.

Supervisors Feature Summary

• Provides simultaneous monitoring for three independent voltage inputs including under-voltage, over-voltage, and negative voltage detection capabilities.
• Features an open-drain reset output that asserts low when monitored voltages exceed defined limits, ensuring reliable system supervision.
• Includes a fixed 200 ms reset delay timer to prevent false triggering during transient power events or startup sequences.

Supervisors Applications

• Monitoring multiple power rails in embedded systems to ensure stable operation.
• Supervising battery-powered devices for under-voltage and over-voltage protection.
• Industrial control systems requiring precise voltage level verification.

Supervisors Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging with lead-free and RoHS compliance. Confirm the 'I' grade designation matches the required industrial temperature range specifications. Ensure the DFN-8 package footprint aligns with the target PCB layout requirements before finalizing procurement orders.

Supervisors Selection Notes

Select this component when triple-channel voltage supervision is required within a compact form factor. The fixed 200 ms delay suits applications tolerant of standard startup times. Consider the 1.5% accuracy specification against system tolerance requirements. Verify that the open-drain output interface is compatible with the downstream logic levels of the microcontroller or processor being supervised.

Supervisors Part Context

This part belongs to the LTC2909 family of precision voltage monitors from Analog Devices. The family offers various threshold configurations and package options to suit different multi-rail monitoring needs. The IDDB variant specifically denotes the industrial temperature range and the 8-lead DFN package style commonly used in space-constrained designs.

Supervisors Replacement Considerations

LTC2909IDDB-3.3#TRMPBF

Supervisors FAQ

What is the function of the reset delay timer?

The reset delay timer provides a fixed 200 ms delay after a fault condition is detected before asserting the reset signal, helping to ignore short-duration transients.

How many voltage inputs can be monitored simultaneously?

The device monitors three independent voltage inputs, supporting dual-input or triple-input configurations depending on the application design.