LTC2918HMS-B1#PBF

Supervisors Overview

The LTC2918HMS-B1#PBF is a low voltage single-supply monitor featuring selectable thresholds and an adjustable watchdog timer. It operates from 1.5V to 5.5V with a quiescent current of 30μA. Three state inputs select one of nine internally programmed supply voltages, including 12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 1V, and +ADJ (0.5V). The device includes a separate manual reset input for push-button interface operation. Threshold accuracy is guaranteed at ±1.5% over the operating temperature range.

Supervisors Feature Summary

• Includes a separate manual reset input allowing simple push-button interface
• Features a windowed watchdog capability for high-reliability applications
• Provides glitch filtering to ensure reliable reset operation without false triggering

Supervisors Applications

• Automotive systems requiring operation up to 125°C
• High-reliability embedded monitoring circuits
• Low voltage power supply supervision

Supervisors Procurement Notes

Verify the specific B1 suffix configuration against official Analog Devices documentation to confirm the presence of the windowed watchdog feature. Ensure the MSOP-10 package matches the target PCB footprint. Confirm that the selected threshold voltage aligns with the nine internal options provided by the three-state logic inputs.

Supervisors Selection Notes

Select this component when a manual reset input is required alongside automatic supervision. The B1 variant is necessary for applications demanding windowed watchdog functionality. Verify that the system voltage remains within the 1.5V to 5.5V operational range and that the 30μA quiescent current meets power constraints.

Supervisors Part Context

This part belongs to the LTC2917/LTC2918 family of low voltage supervisors. While the LTC2917 lacks a manual reset input, the LTC2918 adds this feature. The B1 designation specifically indicates the inclusion of the windowed watchdog timer, distinguishing it from standard versions in the series.

Supervisors Replacement Considerations

LTC2917HMS-B1#PBF: Lacks manual reset input but shares similar supervision features.

Supervisors FAQ

What is the function of the B1 suffix in this model?

The B1 suffix indicates that the device includes a windowed watchdog feature designed for high-reliability applications.

How are the reset thresholds configured?

Thresholds are set using two three-state inputs that select one of nine internally programmed voltages without external resistors.