CAT1021WI-45-GT3

Supervisors Overview

The CAT1021WI-45-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a 2K bit EEPROM with the supervisory function. The device operates within a supply voltage range of 2.7 V to 5.5 V and features a threshold voltage of 4.5 V with an overvoltage threshold of 4.75 V. It includes a manual reset capability and a watchdog timer. The component is housed in an SOIC-8 package and supports SMD/SMT installation. It functions across a temperature range of -40°C to +85°C with a typical operating current of 3 mA.

Supervisors Feature Summary

• Integrates 2K bit EEPROM storage with voltage supervision capabilities
• Provides manual reset functionality for system control
• Includes built-in watchdog timer for fault detection
• Supports single input monitoring with open collector/drain output

Supervisors Applications

• CPU power supply monitoring
• Embedded system voltage supervision
• Industrial control board reset management

Supervisors Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to discontinuation notices. Confirm RoHS compliance status via official Material Composition Declaration documents before integration. Check for specific end-of-life notifications from onsemi regarding production schedules. Ensure packaging specifications match design requirements for surface mount assembly processes.

Supervisors Selection Notes

Select this component when a combined voltage supervisor and non-volatile memory solution is required for low-pin-count designs. The SOIC-8 package offers a compact footprint suitable for space-constrained PCB layouts. Consider the 4.5V threshold alignment with standard logic levels. Verify that the manual reset feature meets system recovery requirements compared to automatic-only reset options.

Supervisors Part Context

This part belongs to the CAT1021 series of supervisory circuits from onsemi. It shares functional similarities with other parts in the family but differs in package type and specific threshold settings. The 'WI' suffix typically indicates the SOIC-8 package variant, distinguishing it from TSSOP or MSOP versions found in related models like the CAT1022 or CAT1026 series.

Supervisors Replacement Considerations

Direct substitutes include CAT1021YI-45-GT3 (TSSOP-8 package) and CAT1021ZI-45-GT3 (MSOP-8 package). Cross-package replacements require PCB layout adjustments. Verify pin compatibility and electrical parameters against original datasheets before substitution.