CAT1022LI-42-G

Supervisors Overview

The CAT1022LI-42-G is a supervisory circuit manufactured by onsemi, designed for microcontroller-based systems. It integrates a 2k-bit I²C serial CMOS EEPROM with system power supervision features including brown-out protection and a watchdog timer. The device operates within a supply voltage range of 2.7 V to 5.5 V, featuring a fixed threshold voltage of 4.2 V. It supports manual reset functionality and provides open-drain outputs. The component is housed in an 8-pin PDIP package and is rated for industrial temperature operation from -40°C to +85°C.

Supervisors Feature Summary

• Integrates 2k-bit I²C serial EEPROM with built-in inadvertent write protection capabilities
• Provides precise power supply monitoring with dedicated brown-out detection and watchdog timer functions
• Supports manual reset input for controlled system initialization and recovery

Supervisors Applications

• Microcontroller system power management
• Industrial control units requiring brown-out protection
• Embedded systems utilizing I²C serial memory interfaces

Supervisors Procurement Notes

Verify the specific suffix 'LI-42-G' against the manufacturer's current datasheet to confirm pinout compatibility and electrical specifications. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the package type and operating temperature range with your design requirements before finalizing orders.

Supervisors Selection Notes

Select this component when a combined solution for non-volatile data storage and power supervision is required. The fixed 4.2 V threshold suits 5 V logic systems. Verify that the I²C interface speed and manual reset requirement align with the target microcontroller architecture. Consider the PDIP package constraints for PCB layout if through-hole mounting is mandatory.

Supervisors Part Context

This part belongs to the CAT1022 series, which combines EEPROM memory with supervisory functions. It is distinct from the CAT1021 (which includes a write-protect pin) and CAT1023 (which lacks manual reset). The 'L' indicates industrial temperature range, while 'I' denotes the PDIP package. This series addresses reliability needs in embedded applications by preventing data corruption during power fluctuations.

Supervisors Replacement Considerations

Direct substitutes include other CAT1022 variants with matching 4.2 V thresholds and PDIP packaging, such as CAT1022LI-42. Verify functional equivalence regarding the presence of the manual reset pin and watchdog timer configuration before substitution.