CAT1025WGI-45

Supervisors Overview

The CAT1025WGI-45 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring in 5V, 3.3V, and 3V systems. It integrates a 2k-bit CMOS EEPROM with I²C serial interface and features a manual reset function. The device operates within a supply voltage range of 2.7V to 5.5V and includes a single monitored input with a threshold voltage of 4.5V. It provides open-drain outputs for active high or low reset signals and incorporates a write protect input. The component is housed in an SOIC-8 package and supports industrial temperature ranges from -40°C to +85°C.

Supervisors Feature Summary

• Integrates 2k-bit EEPROM with I²C serial interface for data storage alongside supervision functions
• Provides manual reset capability with configurable active high or low output states
• Includes write protect input to disable write operations when connected to logic high

Supervisors Applications

• CPU monitoring in 5V systems
• Voltage supervision for 3.3V embedded circuits
• Power management support in 3V microcontroller applications

Supervisors Procurement Notes

Verify the specific suffix 'G' indicates RoHS compliance and lead-free status as per manufacturer specifications. Confirm the SOIC-8 package variant matches design requirements. Check current availability through authorized distributors, as lifecycle status may vary. Ensure compatibility with existing I²C bus protocols and voltage levels before integration into final assemblies.

Supervisors Selection Notes

Select this component when both voltage supervision and non-volatile data storage are required in a single package. The fixed 4.5V threshold suits applications where precise under-voltage detection is critical. Consider the SOIC-8 footprint for PCB layout constraints. Evaluate the need for manual reset functionality versus automatic power-on reset only options available in other series variants.

Supervisors Part Context

This part belongs to the CAT1025 series of supervisory circuits from onsemi. The series combines power supply monitoring with integrated EEPROM memory. The 'W' suffix denotes the SOIC-8 package type, while 'I' indicates industrial temperature rating. The '-45' specifies the 4.5V threshold voltage option. This family targets cost-sensitive applications requiring combined supervision and storage capabilities.

Supervisors Replacement Considerations

CAT1025ZI-45-G offers identical electrical characteristics but utilizes a TSSOP-8 package instead of SOIC-8. CAT1025WI-45-G provides the same SOIC-8 form factor with equivalent performance parameters. Verify pinout compatibility and thermal requirements when substituting between package types.