CAT1026YI-42

Supervisors Overview

The CAT1026YI-42 is a voltage supervisory circuit manufactured by onsemi, designed for CPU supervision applications. It features an integrated 2K-bit EEPROM and operates within a supply voltage range of 2.7 V to 5.5 V. The device monitors a single input with a threshold voltage of 4.2 V and includes a reset delay time of 200 ms. It functions in an industrial temperature range from -40°C to +85°C and consumes a typical operating current of 3 mA. The component is housed in an SOIC-8 surface-mount package.

Supervisors Feature Summary

• Integrates non-volatile 2K-bit EEPROM for data storage alongside voltage monitoring capabilities
• Provides dedicated CPU supervision with automatic reset generation upon power failure
• Operates across a wide industrial temperature range suitable for demanding environments

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Data retention management using integrated EEPROM
• Industrial control units requiring reliable voltage supervision

Supervisors Procurement Notes

Verify the specific suffix and package variant against official datasheets before procurement. Confirm availability status as some variants may be discontinued or subject to special order requirements. Ensure compatibility with existing PCB footprints and thermal management strategies. Cross-reference manufacturer part numbers to avoid substitution errors during production integration.

Supervisors Selection Notes

Select this component when a combined voltage supervisor and small data storage solution is required. The 4.2 V threshold suits systems where main rails operate near this level. Consider the SOIC-8 package for space-constrained designs. Verify that the 200 ms reset delay aligns with system startup timing requirements and that no manual reset or watchdog functionality is needed.

Supervisors Part Context

This part belongs to the CAT1026 series of supervisory circuits from onsemi. The series typically combines voltage monitoring with EEPROM storage. Variants differ by threshold voltage, package type, and output configuration. This specific model targets applications needing both system integrity monitoring and persistent data storage in a compact form factor.

Supervisors Replacement Considerations

Check for direct pin-compatible substitutes within the same series with adjusted thresholds. Verify if newer generations offer improved accuracy or lower current consumption. Ensure any replacement maintains the 2K-bit EEPROM capacity and SOIC-8 footprint.