CAT1161WI30

Supervisors Overview

The CAT1161WI-30-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a precision reset controller with a watchdog timer and an I2C serial CMOS EEPROM providing 16K bits of non-volatile storage. The device operates within a supply voltage range of 2.7 V to 6 V, featuring a threshold voltage of 3 V and an overvoltage threshold of 3.15 V. It offers active high, active low, and open drain output types with a manual reset capability. The reset delay time is specified at 270 ms. Packaged in an SOIC-8 surface-mount format, it supports operation across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a precision reset controller with a watchdog timer for system reliability
• Includes 16K-bit I2C serial CMOS EEPROM for data retention
• Provides flexible output options including active high, active low, and open drain configurations

Supervisors Applications

• CPU power supply monitoring
• Embedded system reset control
• Data logging via integrated EEPROM

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices, as this part may be discontinued. Ensure the specific suffix matches required packaging and voltage thresholds before ordering.

Supervisors Selection Notes

Select this component when a combined supervision and memory solution is required. Verify that the 3 V threshold aligns with the target system voltage. Consider the SOIC-8 package constraints and ensure the I2C interface compatibility with the host microcontroller.

Supervisors Part Context

This part belongs to the CAT1161 series of supervisory circuits from onsemi (formerly Catalyst Semiconductor). The series typically combines voltage monitoring with non-volatile memory functions. Variants differ by threshold voltage and package type, such as the LI series for through-hole packages.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other CAT1161 variants like CAT1161LI-28-G or CAT1161WI-45-T3 only if electrical parameters match exactly.