CAT1640WI-45-T3

Supervisors Overview

The CAT1640WI-45-T3 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It operates within a supply voltage range of 2.7 V to 5.5 V and features a fixed threshold voltage of 4.5 V with an overvoltage threshold of 4.75 V. The device provides manual reset functionality and includes a watchdog timer with a minimum reset delay of 130 ms. It utilizes an open drain output configuration and consumes 3 mA of operating current. The component is housed in an 8-SOIC package and supports industrial temperature ranges from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer with manual reset capability for system reliability
• Provides active high, active low, and open drain output options
• Features a single monitored input channel for voltage supervision

Supervisors Applications

• CPU supervisor circuits requiring voltage monitoring
• Industrial control systems needing watchdog protection
• Embedded systems with manual reset requirements

Supervisors Procurement Notes

Verify the specific suffix 'T3' indicates tape and reel packaging when sourcing. Confirm the 'W' designation corresponds to the SOIC-Wide package variant rather than standard SOIC. Check for RoHS compliance status as indicated in official documentation. Ensure the manufacturer is identified as onsemi to avoid counterfeit components. Validate the 4.5V threshold specification against the latest datasheet revision.

Supervisors Selection Notes

Select this component when a dedicated watchdog timer and manual reset are required alongside voltage supervision. The 4.5V threshold suits 5V logic systems. Consider the 8-SOIC package for surface mount assembly. Verify that the 3mA current consumption fits the power budget. Ensure the open drain output compatibility matches the downstream logic interface requirements.

Supervisors Part Context

This part belongs to the CAT1640 series of supervisory circuits from onsemi. It shares functional similarities with other CAT16xx variants but differs in package type and specific timing parameters. The series is designed for robust system management in embedded environments. Compare with CAT1640YI for TSSOP package alternatives if space constraints differ.

Supervisors Replacement Considerations

CAT1640YI-45-T3 offers the same electrical specifications in an 8-TSSOP package. Verify pinout compatibility before substitution. No direct cross-brand equivalents are confirmed in public data.