CAT1161WI-45-GT3

Supervisors Overview

The CAT1161WI-45-GT3 is a supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a precision voltage supervisor with a 16-kilobyte serial EEPROM utilizing an SPI interface. The device operates within a supply voltage range of 2.7 volts to 6.0 volts and features a threshold voltage of 4.5 volts. It provides manual reset capability and includes a watchdog timer function. The component supports active high, active low, and open drain outputs with a reset delay time of 270 milliseconds. It is housed in an 8-pin SOIC package and functions across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a CPU supervisory circuit with a 16-kilobyte SPI serial EEPROM for combined monitoring and data storage.
• Includes a built-in watchdog timer to ensure system reliability through automated timeout detection.
• Offers flexible output configurations including active high, active low, and open drain options.
• Supports manual reset functionality alongside automatic power-on reset sequences.

Supervisors Applications

• CPU system supervision requiring integrated non-volatile memory
• Industrial control systems needing watchdog timer protection
• Embedded devices requiring manual reset capabilities

Supervisors Procurement Notes

Verify the specific suffix GT3 against current manufacturer documentation to confirm packaging and compliance status. Confirm availability as this component may be subject to obsolescence or limited stock conditions. Cross-reference the exact part number with official distributor catalogs to ensure compatibility with existing design specifications before procurement.

Supervisors Selection Notes

Select this component when a single IC solution is required for both voltage supervision and persistent data storage. Ensure the 4.5-volt threshold aligns with the target system's operating voltage. Verify that the SPI interface speed and protocol are compatible with the host microcontroller. Consider the 8-pin SOIC package constraints for PCB layout requirements.

Supervisors Part Context

This part belongs to the CAT1161 series of supervisory circuits from onsemi. The series typically combines voltage monitoring with embedded EEPROM memory. Variants in this family differ primarily by threshold voltage levels and memory organization. The CAT1161WI-45-GT3 specifically denotes the 4.5-volt threshold variant with industrial temperature rating and tape-and-reel packaging.

Supervisors Replacement Considerations

Check for CAT1161WI-45-T3 as a potential alternative within the same series. Verify pinout compatibility and electrical parameter alignment before substitution. Consult official replacement guides for any functional differences between suffixes.