LTC691IN#PBF

Supervisors Overview

The LTC691IN#PBF is a microprocessor supervisory circuit manufactured by Analog Devices. It operates within a supply voltage range of 4.75 V to 5.5 V and features a precise threshold voltage of 4.65 V for power monitoring. The device provides a CMOS output type with a reset delay time of 50 ms. It includes integrated watchdog timer functionality and battery backup switching capabilities. The unit consumes a typical operating supply current of 600 uA and supports chip enable signals. Designed for through-hole installation, it is housed in a PDIP-16 package and maintains an accuracy of 2% across the specified industrial temperature range.

Supervisors Feature Summary

• Provides complete power supply monitoring and battery control functions for microprocessor reset and RAM write protection
• Integrates a watchdog timer and power failure warning detection circuitry
• Features a precise internal voltage reference and comparator for accurate out-of-tolerance condition detection

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix #PBF confirms the lead-free PDIP-16 through-hole package variant. Confirm the manufacturer designation as Analog Devices Inc., noting the historical Linear Technology branding. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the Mouser part number 584-LTC691IN#PBF for current availability status. Validate that the 4.65 V threshold aligns with your system's voltage supervision needs.

Supervisors Selection Notes

Select this component when a dedicated supervisory circuit with integrated watchdog timing is required. It is suitable for designs needing a fixed 4.65 V threshold without external resistor dividers. Consider the PDIP-16 package if through-hole mounting is mandated by mechanical constraints. The low 600 uA supply current makes it appropriate for systems where standby power consumption must be minimized during active monitoring phases.

Supervisors Part Context

This device belongs to the LTC690 family of microprocessor supervisory circuits, which also includes the LTC690, LTC694, and LTC695. These components provide comprehensive power management support including reset generation and battery backup control. The family utilizes a precise internal voltage reference to monitor supply lines, triggering resets or warnings when voltages fall outside tolerance limits.

Supervisors Replacement Considerations

The LTC690MJ8 serves as a functional substitute within the same supervisory family, offering similar reset and battery backup capabilities. Verify pin compatibility between the PDIP-16 LTC691 and alternative packages like the CERDIP used by the LTC690 before implementation.