CAT1023YI-42-GT3

Supervisors Overview

The CAT1023YI-42-GT3 is a supervisory circuit integrating a 2-kbit I2C serial EEPROM with a voltage monitor, manual reset input, and watchdog timer. It operates within a supply voltage range of 2.7 V to 5.5 V and features a 400 kHz I2C bus interface. The device includes brown-out protection with a threshold voltage of 4.2 V and an overvoltage threshold of 4.5 V. It supports active high or low reset outputs and guarantees valid reset at VCC = 1 V. Packaged in TSSOP-8, it functions from -40°C to +85°C.

Supervisors Feature Summary

• Integrates 2-kbit I2C EEPROM with system power supervisor for microcontroller-based systems
• Includes watchdog timer and manual reset input for enhanced system reliability
• Provides precision power supply voltage monitoring with brown-out protection
• Features inadvertent write protection via WP pin and 16-byte page write buffer

Supervisors Applications

• Microcontroller-based system power management
• Data storage in embedded control circuits
• Brown-out protection in industrial equipment
• Watchdog timer implementation in safety-critical systems

Supervisors Procurement Notes

Verify the specific suffix 'GT3' indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status through official datasheets as environmental declarations may vary by production batch. Ensure the manufacturer is onsemi, as this part was originally developed under the Catalyst Semiconductor brand before acquisition. Check current lifecycle status directly with the manufacturer to confirm availability, as older CMOS parts may be subject to discontinuation notices.

Supervisors Selection Notes

Select this component when both non-volatile data storage and power supervision are required in a single package. The 4.2 V threshold suits 5 V and 3.3 V systems. Verify that the TSSOP-8 package fits the PCB layout constraints. Consider the 400 kHz I2C speed against system bus requirements. Ensure the operating temperature range of -40°C to +85°C meets the application environment needs.

Supervisors Part Context

This part belongs to the CAT1023 family of supervisory circuits with integrated EEPROM. It combines memory and monitoring functions to reduce component count in microcontroller designs. The series offers various threshold voltages and package options. Originally from Catalyst Semiconductor, the product line is now managed by onsemi following their acquisition. The family supports industrial and extended temperature ranges for robust operation.

Supervisors Replacement Considerations

CAT1023WI-42-G (SOIC-8 package) offers identical electrical specifications but in a surface-mount SOIC-8 footprint instead of TSSOP-8. CAT1023UE-42-TE13 provides extended temperature range up to +125°C in TSSOP-8. Verify pin compatibility and package dimensions before substituting.