LTC691ISW#TRPBF

Supervisors Overview

The Analog Devices LTC691ISW#TRPBF is a microprocessor supervisory circuit designed for voltage monitoring and system reset management. It 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. The device provides a CMOS output and includes a fixed 50 ms reset delay time. It supports power failure detection and battery backup switching functions. Operating temperatures range from -40°C to +85°C, with a typical operating current of 600 µA and maximum power dissipation of 500 mW.

Supervisors Feature Summary

• Provides complete power supply monitoring and battery control functions for microprocessor reset and watchdog timing
• Integrates a precise internal voltage reference and comparator circuit to monitor the power supply line
• Features CMOS output format with chip enable signal capability

Supervisors Applications

• Microprocessor reset circuits
• Battery backup systems
• CMOS RAM write protection
• Power failure warning systems

Supervisors Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the ISW variant meets the required industrial temperature range and SOIC-16 package constraints. Cross-reference the datasheet revision to ensure compatibility with existing design specifications before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a dedicated supervisory circuit with integrated watchdog and power-fail detection is required. The CMOS output interface suits digital logic families. Ensure the 4.65 V threshold aligns with the monitored rail tolerance. Consider the 600 µA quiescent current for low-power system designs requiring reliable voltage supervision without excessive drain.

Supervisors Part Context

This part belongs to the LTC690 family of microprocessor supervisory circuits, which also includes the LTC690, LTC694, and LTC695. These devices provide comprehensive power management features including reset generation, battery backup switching, and watchdog timing. The family utilizes a common architecture with varying thresholds and package options to suit different system requirements.

Supervisors Replacement Considerations

The LTC691IN#PBF serves as a pin-compatible alternative in PDIP-16 packaging. Verify that the package change does not impact thermal or mechanical constraints. Other family members like LTC690 or LTC694 may offer different thresholds but share similar functional blocks.