CAT1640LI-45-G

Supervisors Overview

The CAT1640LI-45-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a precision power supply monitor with a manual reset input and features an active low, open drain output. The device operates within a supply voltage range of 3 V to 5.5 V, utilizing a PDIP-8 through-hole package. Key electrical parameters include a threshold voltage of 4.5 V, an overvoltage threshold of 4.75 V, and a reset delay time of 270 ms. It supports a maximum power dissipation of 1 W and functions reliably across an industrial temperature range from -40 °C to +85 °C.

Supervisors Feature Summary

• Integrates a precision voltage supervisor with a manual reset input for system control
• Provides an active low, open drain reset output signal
• Includes built-in overvoltage detection capabilities

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Brown-out protection for microcontroller-based circuits
• System reset generation during power fluctuations

Supervisors Procurement Notes

Verify component authenticity due to obsolete status. Confirm package integrity as PDIP-8 units may have aged. Check datasheet revisions for parameter consistency. Ensure compatibility with existing PCB footprints. Validate thermal performance under maximum load conditions.

Supervisors Selection Notes

Evaluate the fixed 4.5 V threshold against system voltage requirements. Consider the 270 ms reset delay for startup timing constraints. Assess the need for manual reset functionality versus automatic operation. Verify PDIP-8 packaging suitability for assembly processes. Review operating temperature limits for environmental compliance.

Supervisors Part Context

This component belongs to the CAT1640 series of supervisory circuits from onsemi. It combines voltage monitoring with memory support capabilities, specifically targeting CPU applications. The series offers various threshold options and package configurations to suit different design needs within the PMIC category.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.