ICL7665IJA

Supervisors Overview

The ICL7665IJA is a microprocessor voltage monitor manufactured by Analog Devices Inc./Maxim Integrated. It provides overvoltage and undervoltage warnings for system protection. The device operates within a supply voltage range of 1.6V to 16V, while monitoring input voltages starting from 1.3V. It features dual comparators with a precision internal reference and externally programmable trip points via external resistors. The component draws a typical operating current of only 3µA. It includes on-board hysteresis and outputs active high or low signals. The industrial temperature grade (I) supports operation from -40°C to +85°C in an 8-pin DIP package.

Supervisors Feature Summary

• Dual comparator design with precision internal reference for accurate voltage detection
• Externally programmable trip points allowing flexible threshold configuration
• Ultra-low power consumption with typical operating current of 3µA
• On-board hysteresis integrated to prevent output oscillation during threshold transitions

Supervisors Applications

• Microprocessor voltage monitoring systems
• Low-battery detection circuits
• Power-fail and brownout detection applications
• Battery backup switching logic
• Over/undervoltage protection in industrial equipment

Supervisors Procurement Notes

Verify the specific suffix 'IJA' against official datasheets to confirm industrial temperature rating (-40°C to +85°C) and through-hole DIP packaging. Confirm RoHS compliance status as older Maxim variants may not meet current standards. Ensure external resistor values are calculated correctly for desired trip points, as thresholds are user-defined. Check for obsolescence notices or lifecycle status updates from the manufacturer before finalizing procurement plans.

Supervisors Selection Notes

Select this component when precise, adjustable voltage monitoring is required without fixed internal thresholds. The ICL7665IJA is suitable for designs needing ultra-low quiescent current to extend battery life. Consider the need for external programming resistors versus fixed-threshold alternatives. Verify that the 1.6V minimum supply voltage aligns with the system's lowest operating condition. Ensure the manual reset capability matches the system's fault recovery strategy.

Supervisors Part Context

The ICL7665 series belongs to Maxim Integrated's family of micropower voltage monitors designed for protecting microprocessors and memory devices. It serves as a critical interface between power supplies and digital logic, ensuring system stability during voltage transients. The 'I' designation indicates an industrial temperature range, expanding usability beyond commercial environments. This part complements other supervisory circuits like the ICL7665C and ICL7665B, offering customizable detection limits.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include ICL7665ACSA+ and ICL7665CSA+. These equivalents offer parameter-matched functionality but may differ in package type (SOIC vs. DIP) or temperature grade. Verify pin compatibility and electrical specifications before substitution. Note that some replacements may carry updated RoHS compliance status compared to the original ICL7665IJA.