CAT1023ZD4I-42-T2

Supervisors Overview

The CAT1023ZD4I-42-T2 is a supervisory circuit manufactured by onsemi, integrating a 2-kbit I2C serial EEPROM with system power monitoring capabilities. It operates within a voltage range of 2.7 V to 5.5 V and features a fixed threshold voltage of 4.2 V for under-voltage detection. The device includes a watchdog timer, manual reset input, and over-voltage protection at 4.5 V. Designed for industrial temperatures (-40°C to +85°C), it utilizes low-power CMOS technology and is housed in an 8-pin TDFN package (3x3 mm).

Supervisors Feature Summary

• Integrates 2-kbit I2C EEPROM with brown-out protection and watchdog timer.
• Provides precise voltage supervision with manual reset capability.
• Ensures valid reset output down to 1 V supply voltage.
• Supports 400 kHz I2C bus interface with page write buffer.

Supervisors Applications

• Microcontroller-based systems requiring memory and supervision.
• Industrial control units operating in harsh environments.
• Consumer electronics needing reliable power management.

Supervisors Procurement Notes

Verify the specific suffix 'T2' indicates tape-and-reel packaging if required for automated assembly. Confirm the 'ZD4' package code corresponds to the TDFN-8 form factor. Check current lifecycle status as some variants may be discontinued. Ensure RoHS compliance documentation is available for regulatory adherence. Validate that the 4.2 V threshold matches the target system's under-voltage requirements.

Supervisors Selection Notes

Select this component when a combined solution for data storage and power supervision is needed. The 4.2 V threshold suits 5 V and 3.3 V systems. Consider the TDFN package for space-constrained designs. Verify I2C compatibility with the host microcontroller. Evaluate the need for the integrated watchdog timer to enhance system reliability.

Supervisors Part Context

This part belongs to the CAT1023 family, which combines EEPROM memory with supervisory functions. It is designed for microcontroller applications where power integrity and non-volatile data retention are critical. The family offers various threshold voltages and package options to suit different design constraints.

Supervisors Replacement Considerations

Check for CAT1023 variants with different suffixes indicating alternative packages or thresholds. Verify functional equivalence regarding I2C speed and memory size. Ensure substitute parts support the same temperature range and voltage specifications.