CAT1023LI-42

Supervisors Overview

The CAT1023LI-42 is a supervisory circuit integrating a 2-kbit I2C serial EEPROM with system power monitoring capabilities. It operates within a supply voltage range of 2.7 V to 5.5 V and features a manual reset input alongside a watchdog timer. The device monitors a single input with a threshold voltage of 4.2 V, an undervoltage threshold of 4.25 V, and an overvoltage threshold of 4.5 V. It supports industrial temperature ranges from -40°C to +85°C and consumes 3 mA during operation.

Supervisors Feature Summary

• Integrates 2-kbit I2C serial EEPROM with brown-out protection
• Includes manual reset input and watchdog timer functionality
• Provides precision power supply voltage monitoring for 5 V, 3.3 V, and 3 V systems

Supervisors Applications

• Microcontroller-based system supervision
• I2C bus memory storage in embedded devices
• Brown-out protection circuits

Supervisors Procurement Notes

Verify component authenticity through authorized onsemi distributors or direct manufacturer channels. Confirm the specific suffix 'LI-42' matches required package type (PDIP-8) and temperature grade. Request official datasheets and RoHS compliance documentation prior to procurement to ensure alignment with design specifications and regulatory requirements.

Supervisors Selection Notes

Select this component when a combined solution for non-volatile data storage and power supervision is required. Ensure the 4.2 V threshold aligns with the target system voltage rails. Verify that the PDIP-8 package fits the PCB layout constraints. Consider the 400 kHz I2C speed and page write buffer size relative to application data throughput needs.

Supervisors Part Context

Part of the CAT102x series combining EEPROM and supervisor functions. Similar variants include CAT1021, CAT1022, and CAT1023 with different package options like SOIC, TSSOP, MSOP, or TDFN. The LI-42 suffix indicates specific pinout and threshold characteristics within the family.

Supervisors Replacement Considerations

Check for CAT1023ZI-42-T3 or CAT1023RI-42 for surface mount alternatives. Verify functional equivalence regarding I2C interface, EEPROM capacity, and reset thresholds before substitution.