LTC690CS8#PBF

Supervisors Overview

The LTC690CS8#PBF is a microprocessor supervisory circuit manufactured by Analog Devices Inc. in an 8-pin SOIC package. It provides complete power supply monitoring and battery control functions for microprocessor reset, battery backup, CMOS RAM write protection, power failure warning, and watchdog timing. The device features a precise internal voltage reference and comparator circuit to monitor the power supply line. When an out-of-tolerance condition occurs, the reset output activates.

Supervisors Feature Summary

• Provides comprehensive power supply monitoring and battery control functions including microprocessor reset and watchdog timing.
• Features a precise internal voltage reference and comparator circuit to detect out-of-tolerance power supply conditions.

Supervisors Applications

• Microprocessor reset circuits
• Battery backup systems
• CMOS RAM write protection

Supervisors Procurement Notes

Verify that the specific suffix #PBF corresponds to the lead-free RoHS-compliant variant of the LTC690CS8 when sourcing from distributors. Confirm the package type is 8-SOIC as indicated in official component descriptions. Ensure the part number matches the exact supervisory function requirements rather than similar family members like the LTC691 or LTC694 which may have different pinouts or thresholds.

Supervisors Selection Notes

Select this component when a simple, low-cost supervisory circuit with a fixed threshold is required for standard voltage rails. It is suitable for applications where external resistor networks are undesirable due to space or cost constraints. Consider the LTC691 if a different reset threshold voltage is needed, or the LTC694/LTC695 for additional functionality such as manual reset inputs or multiple monitored supplies.

Supervisors Part Context

The LTC690 is part of the LTC690 family, which includes the LTC690, LTC691, LTC694, and LTC695. This family is designed to provide complete power supply monitoring and battery control functions. The CS8 suffix indicates a commercial temperature range and an 8-pin SOIC package. Other variants in the family offer different thresholds, manual reset capabilities, or dual-supply monitoring options.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include LTC690CS8#TRPBF (tape and reel version) and LTC690CS8-PBF. For different thresholds, consider LTC691CS8#PBF. For manual reset capability, consider LTC694CS8#PBF or LTC695CS8#PBF. Verify package compatibility and electrical specifications before substitution.