CAT1161WI-28-G

Supervisors Overview

The CAT1161WI-28-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It features an I2C serial CMOS EEPROM with 16K capacity and includes a precision reset controller alongside a watchdog timer. The device operates within a supply voltage range of 2.7 V to 6 V, with a specific under-voltage threshold of 2.85 V and an over-voltage threshold of 3 V. It provides a manual reset input and offers configurable output types including active high, active low, and open drain configurations. 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 with a working power current of 3 mA.

Supervisors Feature Summary

• Integrates 16K I2C serial CMOS EEPROM for data storage alongside supervisory functions
• Includes built-in watchdog timer for system reliability monitoring
• Provides configurable reset outputs supporting active high, active low, and open drain modes
• Features manual reset input capability for user-initiated system control

Supervisors Applications

• CPU monitoring systems requiring integrated memory and supervision
• Industrial control units needing watchdog timer functionality
• Embedded systems utilizing I2C communication interfaces

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential availability constraints. Confirm the specific suffix matches the required package and voltage threshold specifications. Check for end-of-life status or obsolescence notices prior to procurement planning. Ensure compliance with RoHS directives if applicable to your manufacturing region. Validate that the SOIC-8 footprint aligns with your PCB design requirements before finalizing orders.

Supervisors Selection Notes

Select this component when both voltage supervision and non-volatile data storage are required in a single package. The I2C interface allows for flexible configuration of reset parameters and watchdog timeouts via software. Consider the SOIC-8 package size for space-constrained surface-mount designs. Ensure the operating voltage range covers your system's nominal and peak supply levels. Verify that the available output drive capabilities meet the load requirements of your reset line.

Supervisors Part Context

This part belongs to the CAT1161 family of supervisory circuits from onsemi, which combines power management with embedded memory. The WI suffix indicates a wide-temperature industrial grade variant in an SOIC-8 package. The 28 designation specifies the under-voltage threshold voltage level. This series is distinct from the CAT1163, which may offer different memory capacities or feature sets.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.