LTC691CN#PBF

Supervisors Overview

The LTC691CN#PBF is a microprocessor supervisory circuit manufactured by Analog Devices Inc. It provides voltage monitoring and reset generation for system reliability. The device operates within a supply voltage range of 4.75 V to 5.5 V, featuring a precise threshold voltage of 4.65 V with 2% accuracy. It utilizes a PDIP-16 through-hole package and includes a watchdog timer function. The reset delay time is specified at 50 ms, and the chip enables via a dedicated signal. Operating temperatures range from -40°C to +85°C, with a typical quiescent current of 600 uA.

Supervisors Feature Summary

• Integrates complete power supply monitoring and battery control functions for microprocessor reset and backup applications.
• Includes a watchdog timer and power failure warning capabilities to ensure system stability.
• Features a CMOS output type suitable for direct interfacing with digital logic circuits.

Supervisors Applications

• Microprocessor reset supervision in embedded systems
• Battery backup switching for non-volatile memory retention
• CMOS RAM write protection circuits

Supervisors Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm RoHS compliance status and lot traceability upon receipt. Ensure storage conditions adhere to moisture sensitivity level requirements to prevent package degradation prior to assembly.

Supervisors Selection Notes

Select this component when a single-channel voltage supervisor with integrated watchdog functionality is required. The fixed 4.65 V threshold suits standard 5 V logic systems. Consider the PDIP-16 package for through-hole prototyping or high-reliability mechanical mounting needs compared to surface-mount alternatives.

Supervisors Part Context

This part belongs to the LTC690 family of supervisory circuits, which also includes the LTC690, LTC694, and LTC695. These devices share common architectural features for power management but differ in pin counts, package options, and specific feature sets like manual reset availability or additional input channels.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with LTC690 series variants only if functional compatibility with shared family features is verified against official datasheets.