CAT1026WI-45

Supervisors Overview

The CAT1026WI-45-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU and memory protection. It operates within a supply voltage range of 2.7 V to 5.5 V and features a fixed threshold voltage of 4.5 V. The device monitors a single input channel and provides an open-drain reset output with a typical delay of 200 ms. It integrates a 2-kbit CMOS EEPROM accessible via a 400 kHz I²C bus. The component supports industrial temperature ranges from -40°C to +85°C and is housed in an SOIC-8 package.

Supervisors Feature Summary

• Integrates a 2-kbit serial EEPROM with hardware write protection to prevent data corruption during power fluctuations.
• Provides precise voltage monitoring with a guaranteed valid reset signal down to 1 V supply level.
• Features an open-drain reset output compatible with standard logic interfaces.

Supervisors Applications

• CPU system supervision
• Memory backup systems
• Brownout detection circuits

Supervisors Procurement Notes

Verify the specific suffix (e.g., -G) against the official datasheet to confirm RoHS compliance and lead-free status. Confirm that the -45 designation corresponds to the required 4.5 V threshold for your application. Ensure the SOIC-8 package matches your PCB footprint requirements before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a combined voltage supervisor and non-volatile storage solution is required. The fixed 4.5 V threshold suits 5 V systems. Verify that the single-channel monitoring capability meets system needs, as dual-channel variants exist within the same family. Ensure the I²C interface compatibility aligns with the host controller.

Supervisors Part Context

This part belongs to the CAT1026 series, which combines supervisory functions with embedded EEPROM. Unlike the CAT1027, it lacks a watchdog timer. It differs from the CAT1025 by omitting manual reset inputs and offering different pin configurations suitable for surface-mount applications.

Supervisors Replacement Considerations

CAT1026WI-45-GT3: Identical electrical specifications but supplied in tape-and-reel packaging instead of tube.

Supervisors FAQ

Does the CAT1026WI-45 include a manual reset input?

No, the CAT1026 series does not feature a manual reset input; it relies solely on automatic voltage monitoring for reset generation.

What is the maximum operating voltage for this device?

The maximum operating supply voltage is 5.5 V.