CAT1021WI30

Supervisors Overview

The CAT1021WI-30-GT3 is a voltage supervisory circuit manufactured by onsemi, housed in an SOIC-8 surface-mount package. It integrates a 2k-bit CMOS EEPROM with I²C serial interface and a system power supervisor featuring brown-out protection. The device monitors a single input with a threshold voltage of 3 V to 3.15 V and supports manual reset functionality alongside a built-in watchdog timer. It operates within a supply voltage range of 2.7 V to 5.5 V and functions across temperatures from -40°C to +85°C.

Supervisors Feature Summary

• Integrates 2k-bit serial EEPROM with I²C interface for non-volatile data storage
• Provides system power supervision with brown-out detection and manual reset capability
• Includes a built-in watchdog timer to ensure system reliability
• Features inadvertent write protection via the WP pin

Supervisors Applications

• Microcontroller-based systems requiring memory and supervision
• Industrial control units needing reliable power monitoring
• Automotive electronics operating in extended temperature ranges

Supervisors Procurement Notes

Verify component status as this part may be obsolete or end-of-life. Confirm availability through authorized distributors or secondary markets like Rochester Electronics. Ensure RoHS compliance matches project requirements. Check for alternative packages if SOIC-8 is unavailable. Validate datasheet revisions for any functional changes before integration.

Supervisors Selection Notes

Select this component when a combined solution for memory storage and power supervision is required. The I²C interface minimizes pin count compared to parallel alternatives. Consider the 2k-bit capacity against application data logging needs. Verify that the 3 V threshold aligns with the target system's operating voltage. Ensure the SOIC-8 package fits the PCB layout constraints.

Supervisors Part Context

This part belongs to the CAT1021 series, which combines supervisory circuits with serial EEPROM. Other variants include different threshold voltages (e.g., CAT1021WI-45) and package types such as DIP or TSSOP. The series is designed for microcontroller systems, offering integrated protection and storage in a compact form factor suitable for space-constrained designs.

Supervisors Replacement Considerations

Check for direct substitutes within the CAT1021 family with matching thresholds. Verify pin compatibility with other SOIC-8 supervisors. Consult onsemi documentation for discontinued part notifications. Ensure equivalent I²C addressability if multiple devices are used.