CAT1161WI-42-G

Supervisors Overview

The CAT1161WI-42-G is a supervisory circuit manufactured by onsemi, designed for CPU systems with integrated 16K EEPROM. It operates within a supply voltage range of 2.7 V to 6 V and features a threshold voltage of 4.2 V. The device includes a watchdog timer and manual reset capability, with an active high, active low, or open drain output type. It has a reset delay time of 270 ms and a maximum power dissipation of 1 W. The component is housed in an SOIC-Wide-8 package and supports surface mount installation. Operating temperatures range from -40 C to +85 C.

Supervisors Feature Summary

• Integrates 16K serial CMOS EEPROM with hardware write protection
• Includes precision reset controller with brown-out protection
• Features watchdog timer monitoring SDA line without extra traces

Supervisors Applications

• Microcontroller-based system supervision
• CPU supervisor applications requiring memory integration
• Systems needing brown-out protection and watchdog functionality

Supervisors Procurement Notes

Verify the specific suffix 'G' indicates lead-free compliance as per RoHS standards. Confirm the 'WI' designation corresponds to the SOIC-Wide-8 package variant. Check current availability status as this part may be discontinued or subject to last-time buy restrictions. Ensure compatibility with I2C bus interface requirements for the integrated EEPROM section.

Supervisors Selection Notes

Select this component when a combined supervisory circuit and non-volatile memory solution is required. It is suitable for designs needing a watchdog timer that monitors the data line. Consider the 4.2 V threshold for appropriate voltage monitoring levels. Evaluate the SOIC-Wide-8 package constraints against PCB layout requirements.

Supervisors Part Context

This part belongs to the CAT1161/2 family, which combines supervisory functions with I2C serial EEPROM. The CAT1161 variant specifically includes a watchdog timer, distinguishing it from the CAT1162. It serves as a complete memory and supervisory solution for microcontroller systems, integrating power monitoring, reset control, and data storage in a single low-power CMOS chip.

Supervisors Replacement Considerations

CAT1161WI-30-G offers a 3 V threshold. CAT1161WI-45-T3 provides a 4.5 V threshold. CAT1161LI-42-G is the PDIP-8 through-hole equivalent with identical electrical characteristics.