CAT1161WI-28-T3

Supervisors Overview

The CAT1161WI-28-T3 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a 16K I2C serial CMOS EEPROM with a precision reset controller and watchdog timer. The device operates within a supply voltage range of 2.7 V to 6 V, featuring a threshold voltage of 2.8 V and an overvoltage threshold of 3 V. It provides a manual reset input and supports active high, active low, and open drain output types. The component includes a 270 ms reset delay time and consumes 3 mA of operating current. It is housed in an SOIC-8 surface-mount package and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates 16K I2C serial EEPROM with voltage supervision and watchdog timer
• Provides flexible output configurations including active high, active low, and open drain
• Supports manual reset functionality for system control

Supervisors Applications

• CPU voltage monitoring systems
• Embedded controllers requiring non-volatile data storage
• Industrial equipment with watchdog protection needs

Supervisors Procurement Notes

Verify the specific suffix T3 indicates tape and reel packaging configuration. Confirm RoHS compliance status through official documentation. Check for end-of-life notifications or discontinuance alerts from onsemi. Ensure the SOIC-8 package matches your PCB footprint requirements. Validate that the 2.8 V threshold aligns with your target supply rail specifications before procurement.

Supervisors Selection Notes

Select this component when both voltage supervision and 16K data storage are required in a single IC. Compare against CAT1161 variants with different thresholds if system voltage differs. Consider the SOIC-8 package size constraints relative to available board space. Verify compatibility with I2C bus speeds and pull-up resistor requirements. Ensure the watchdog timer feature meets your system's fault detection timing needs.

Supervisors Part Context

This part belongs to the CAT1161 family of supervisory circuits combining EEPROM memory with reset management. It shares functional similarities with CAT1162 and CAT1163 series devices but differs in memory capacity and interface specifics. The WI-28 designation specifies the wide-body SOIC package and 2.8 V threshold variant. This integration reduces component count compared to discrete supervisor and EEPROM solutions.

Supervisors Replacement Considerations

CAT1161LI-28-G offers similar functionality in a PDIP-8 through-hole package. CAT1161WI-25-T3 provides a 2.5 V threshold option within the same package style. CAT1163J-28 includes watchdog features but lacks the integrated EEPROM memory. Verify pinout compatibility and electrical parameters before substituting any alternative part numbers.