LTC691ISW#PBF

Supervisors Overview

The LTC691ISW#PBF is a microprocessor supervisory circuit manufactured by Analog Devices Inc., housed in an 8-SOIC package. It monitors a single voltage input with a threshold of 4.65 V and features a CMOS output type. The device includes a watchdog timer, battery backup switch, and power failure detection capabilities. It operates within a supply voltage range of 4.75 V to 5.5 V, drawing 600 uA of working current. The reset delay time is 50 ms, with an accuracy of 2%. It functions between -40°C and +85°C.

Supervisors Feature Summary

• Provides complete power supply monitoring for microprocessor reset and battery backup control
• Integrates watchdog timing and power failure warning functions
• Features precise internal voltage reference and comparator circuit

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix against official documentation to confirm pinout and electrical characteristics match design requirements. Confirm RoHS compliance status through manufacturer datasheets. Ensure availability aligns with project timelines as distribution status may vary. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Supervisors Selection Notes

Select this component when a single-supply monitor with integrated watchdog and power failure detection is required. Consider the 4.65 V threshold and 50 ms reset delay for system timing constraints. Evaluate the SOIC package for PCB space limitations. Compare operating temperature ranges against environmental conditions.

Supervisors Part Context

Part of the LTC690 family, which provides comprehensive power management supervision. This series integrates voltage monitoring, reset generation, and battery management into a single IC. The family supports various thresholds and packages to suit different microprocessor architectures.

Supervisors Replacement Considerations

LTC690MJ8 is a documented substitute within the same family offering similar supervisory functions.