CAT1163WI42

Supervisors Overview

The CAT1163WI-42 is a supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a 16K EEPROM with I2C serial interface capabilities. The device features a voltage threshold of 4.2 V and an overvoltage threshold of 4.5 V. It operates within a supply voltage range up to 6 V and includes a manual reset input alongside a watchdog timer. The reset delay time is specified at 270 ms. The component supports active high, active low, and open drain output types. It is housed in an SOIC-Wide-8 package and functions within a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates 16K nonvolatile EEPROM with I2C serial communication interface
• Provides precision voltage supervision with dedicated watchdog timer functionality
• Supports flexible output configurations including active high, active low, and open drain options

Supervisors Applications

• CPU system monitoring and reset generation
• Data storage for critical system parameters via integrated EEPROM
• Industrial control systems requiring voltage supervision

Supervisors Procurement Notes

Verify the exact suffix (e.g., T3 or G) as it indicates packaging format. Confirm RoHS compliance status through official documentation. Check current lifecycle status as this part may be obsolete. Ensure the specific voltage threshold variant matches the design requirement. Validate pinout compatibility with existing PCB layouts before procurement.

Supervisors Selection Notes

Select this component when both voltage supervision and persistent data storage are required in a single package. The 4.2 V threshold suits specific power rail monitoring needs. Consider the SOIC-Wide-8 package for board space constraints. Verify that the I2C interface speed meets system timing requirements. Evaluate the 270 ms reset delay against processor startup times.

Supervisors Part Context

This part belongs to the CAT1163 family of supervisory circuits from onsemi. These devices combine power management monitoring with memory storage. The family offers various voltage thresholds to accommodate different supply rails. The integration reduces component count compared to separate supervisor and EEPROM chips.

Supervisors Replacement Considerations

Check for direct substitutes within the CAT1163 series with matching voltage thresholds. Verify pin-to-pin compatibility with alternative packages if available. Ensure functional equivalence regarding watchdog timer behavior and EEPROM capacity.