CAT1641WI-42

Supervisors Overview

The CAT1641WI-42 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It operates within a supply voltage range of 3 V to 5.5 V and features an SOIC-8 surface-mount package. The device monitors a single input with specific threshold voltages of 3 V, 3.3 V, and 5 V. It provides active high and open drain outputs with a manual reset capability. Key electrical parameters include a reset delay time of 270 ms, a maximum power dissipation of 1 W, and a quiescent current of 3 mA. The component supports an overvoltage threshold of 4.5 V and functions reliably across an operating temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Integrates CPU supervision with non-volatile memory capabilities
• Provides manual reset functionality for system control
• Features active high and open drain output configurations

Supervisors Applications

• CPU voltage monitoring in embedded systems
• System reset generation for microprocessors
• Power management circuits requiring manual intervention

Supervisors Procurement Notes

Verify the exact suffix (e.g., T3) for packaging details as the base part number may refer to multiple variants. Confirm RoHS compliance status through official datasheets or manufacturer documentation before integration. Check current lifecycle status as this component may be discontinued or subject to last-time buy restrictions. Ensure the selected variant matches the required package type and thermal specifications for your application design.

Supervisors Selection Notes

Select this component when a supervisory circuit with integrated EEPROM storage is required for CPU monitoring. Consider the 270 ms reset delay and 3 mA quiescent current against system power and timing constraints. Verify that the SOIC-8 package fits the PCB layout requirements. Compare against other CAT1641 variants if different reset delays or memory sizes are needed. Ensure the operating voltage range aligns with the target system's power rails.

Supervisors Part Context

This component belongs to the CAT1641 series of supervisory circuits produced by onsemi. The series typically combines voltage monitoring with serial EEPROM functionality for storing calibration data or configuration settings. These devices are part of the broader PMIC category, focusing on power management and system reliability. The WI suffix indicates a specific package and temperature grade variation within the product line.

Supervisors Replacement Considerations

CAT1641YI-42-GT3 offers similar supervisory functions but utilizes a TSSOP-8 package and features a significantly faster 5 us reset delay compared to the 270 ms delay of the CAT1641WI-42. Verify package compatibility and timing requirements before substitution.