CAT1161WI-25-G

Supervisors Overview

The CAT1161WI-25-G is a supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a 16K I2C serial CMOS EEPROM with a precision reset controller and a watchdog timer. The device operates within a supply voltage range of 2.7 V to 6 V, featuring a threshold voltage of 2.5 V and an overvoltage threshold of 2.7 V. It provides active high, active low, and open drain outputs with a manual reset capability. The reset delay time is specified at 270 ms. The component supports single input monitoring and consumes 3 mA of operating current. It is housed in an SOIC-Wide-8 package and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates 16K I2C serial EEPROM for non-volatile data storage alongside supervisory functions
• Includes a precision reset controller with configurable output types and manual reset input
• Features an integrated watchdog timer to ensure system stability

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Data retention using integrated serial EEPROM
• System reset management with watchdog protection

Supervisors Procurement Notes

Verify the obsolete status of this part number before procurement planning. Check for end-of-life notifications or product change notices from onsemi. Source components only from authorized distributors to ensure authenticity. Confirm package compatibility and lead times with suppliers as availability may be limited due to discontinuation status.

Supervisors Selection Notes

Select this component when a combined solution for voltage supervision and non-volatile memory is required. Ensure the 2.5 V threshold matches the monitored rail voltage. Verify that the SOIC-Wide-8 package fits the PCB layout constraints. Consider the 3 mA quiescent current impact on overall system power budget during selection.

Supervisors Part Context

This part belongs to the CAT1161 series of supervisory circuits from onsemi. The series typically combines voltage monitoring with I2C EEPROM capabilities. Variants in the family differ primarily in threshold voltages and package types. The CAT1161WI-25-G specifically denotes the wide SOIC package and 2.5 V threshold variant within this product line.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The part status is listed as obsolete. Engineers should consult onsemi for recommended replacements or evaluate similar supervisory circuits with integrated EEPROM from other manufacturers if sourcing new units.