CAT1027YI-42-GT3

Supervisors Overview

The CAT1027YI-42-GT3 is a dual voltage supervisory circuit manufactured by onsemi, housed in an 8-TSSOP package. It integrates a 2-kbit I²C serial EEPROM with two independent voltage monitoring channels. The device operates within a supply voltage range of 2.7 V to 5.5 V and features a typical operating current of 3 mA. Key electrical parameters include a threshold voltage of 4.2 V, an overvoltage threshold of 4.5 V, and an undervoltage threshold of 4.25 V. It supports an open-drain output configuration and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates dual voltage supervision with a 2-kbit I²C serial EEPROM for data storage
• Provides open-drain output capability for flexible system interfacing
• Supports standard I²C communication protocol for reliable data access

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Data retention management in battery-backed circuits
• Industrial control system voltage supervision

Supervisors Procurement Notes

Verify the specific suffix GT3 indicates tape and reel packaging when placing orders. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the 8-TSSOP footprint matches your PCB layout requirements. Check for any recent product change notices regarding pinout or electrical characteristics updates from onsemi before finalizing procurement specifications.

Supervisors Selection Notes

Select this component when both voltage supervision and non-volatile data storage are required in a single package. The dual-channel design allows monitoring of separate power rails simultaneously. The I²C interface minimizes pin count compared to parallel EEPROM solutions. Consider the 4.2 V threshold specifically for applications requiring precise detection of nominal 5 V rail deviations.

Supervisors Part Context

This part belongs to the CAT1027 series of supervisory circuits which combine voltage monitoring with memory functions. It serves as a compact solution for systems needing both reset generation and persistent data logging. The I²C interface distinguishes it from SPI-based alternatives in the same family, offering compatibility with standard microcontroller peripherals.

Supervisors Replacement Considerations

CAT1027ZI-42-T3 offers similar functionality in an MSOP-8 package with tape and reel packaging.