CAT140021TWI-G

Supervisors Overview

The CAT140021TWI-G is a voltage supervisory circuit manufactured by onsemi, housed in an 8-pin SOIC-wide package. It monitors a single input with threshold voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The device operates within a supply voltage range of 2.5 V to 5.5 V and includes a 2-kbit I2C EEPROM for configuration storage. It features no manual reset or watchdog timer functions. Operating temperatures range from -40°C to +85°C, with a typical supply current of 1 mA.

Supervisors Feature Summary

• Integrates a 2-kbit I2C-compatible serial EEPROM for non-volatile configuration data storage alongside the supervisory function.

Supervisors Applications

• Voltage monitoring in embedded systems requiring configurable thresholds via I2C interface.

Supervisors Procurement Notes

Verify component authenticity through official onsemi channels or authorized distributors. Confirm the specific suffix matches the required pinout and package variant. Check for obsolescence status as some variants may be discontinued. Ensure ESD protection measures are applied during handling due to the CMOS construction. Validate that the I2C address and EEPROM capacity meet system design requirements before procurement.

Supervisors Selection Notes

Select this component when a combined supervisor and small data storage solution is needed in a compact SOIC-8 package. Consider the available threshold options (2.5V, 3V, 3.3V, 5V) to match the monitored rail. Verify that the absence of a watchdog timer and manual reset does not conflict with system safety protocols. Ensure the I2C bus speed and addressing scheme are compatible with the host controller.

Supervisors Part Context

This part belongs to the CAT14002 series of supervisory circuits from onsemi, designed for power management applications. It integrates voltage supervision with non-volatile memory, allowing for flexible system configuration without external components. The series supports various threshold voltages to accommodate different logic families and power rails commonly used in consumer and industrial electronics.

Supervisors Replacement Considerations

The CAT140021TWI-GT3 is listed as obsolete with similar substitutes available. Verify if the CAT140021SWI-G or other CAT14002x variants offer equivalent functionality and pin compatibility. Cross-reference datasheets to ensure identical threshold options and EEPROM capacity before substitution.

Supervisors FAQ

Does the CAT140021TWI-G include a built-in watchdog timer?

No, the device specifications indicate it does not include a watchdog timer function.

What is the maximum operating supply voltage for this IC?

The maximum operating supply voltage is 5.5 V.