CAT1641WI-25

Supervisors Overview

The CAT1641WI-25 is a supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a voltage supervisor with a 64K CMOS EEPROM. The device operates within a supply voltage range of 3 V to 5.5 V and features selectable threshold voltages including 2.5 V, 3 V, 3.3 V, and 5 V. It provides an active high or open drain output with a manual reset capability and a fixed reset delay time of 270 ms. The component supports single-input monitoring without a watchdog timer or battery backup switch. It is housed in an SOIC-8 surface-mount package and functions reliably across an operating temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a voltage supervisory circuit with a 64K CMOS EEPROM for combined monitoring and data storage.
• Provides manual reset functionality with a defined reset delay time for precise timing control.
• Supports multiple selectable threshold voltages to accommodate various system power rails.

Supervisors Applications

• CPU monitoring systems
• Voltage supervision in embedded controllers
• Data retention circuits requiring integrated memory

Supervisors Procurement Notes

Verify the specific suffix against official datasheets to confirm threshold voltage selection and package type. Ensure compatibility with required operating temperatures and supply voltage ranges. Confirm RoHS compliance status through manufacturer documentation before integration into final designs.

Supervisors Selection Notes

Select this component when simultaneous voltage supervision and non-volatile data storage are required in a compact form factor. Consider the 270 ms reset delay and manual reset feature for system initialization requirements. Verify that the available threshold options align with the target power rail specifications.

Supervisors Part Context

This part belongs to the CAT1641 series of supervisory circuits from onsemi. The series combines power management monitoring with embedded EEPROM capabilities, targeting applications where system integrity and configuration data preservation are critical. It serves as a specialized PMIC solution for microprocessor-based systems.

Supervisors Replacement Considerations

Check for CAT1641 variants with different suffixes for alternative threshold voltages or packages. Verify pinout compatibility if substituting with other supervisory ICs featuring integrated memory.