CAT1023WI42

Supervisors Overview

The CAT1023WI-42-G is a supervisory circuit from onsemi, designed for microcontroller-based systems. It integrates a 2k-bit I2C serial EEPROM with a power supply voltage monitor featuring brown-out protection. The device operates within a supply voltage range of 2.7 V to 5.5 V and includes a watchdog timer and manual reset input. It utilizes a 400 kHz I2C bus interface and offers active high or low reset outputs. The component is housed in an SOIC-8 package and supports industrial temperature ranges.

Supervisors Feature Summary

• Integrates 2k-bit I2C serial EEPROM with system power supervisor
• Includes built-in watchdog timer and manual reset capability
• Provides precision voltage monitoring with brown-out protection
• Features low power CMOS technology with inadvertent write protection

Supervisors Applications

• Microcontroller-based system supervision
• Brown-out protection circuits
• Data storage in embedded systems
• Industrial control system monitoring

Supervisors Procurement Notes

Verify the exact part number suffix, such as -G for lead-free compliance, against official datasheets. Confirm package type and threshold voltage options match design requirements. Check current availability status as components may be subject to obsolescence or supply constraints. Ensure compatibility with I2C bus specifications and operating temperature ranges for the intended application environment.

Supervisors Selection Notes

Select this component when a combined memory and supervision solution is required for microcontroller systems. Consider the specific threshold voltage needed, such as 4.2 V for this variant, to ensure proper reset timing. Evaluate the need for watchdog functionality and manual reset inputs. Verify that the SOIC-8 package fits the PCB layout constraints and that the I2C interface speed meets system communication requirements.

Supervisors Part Context

The CAT1023 series belongs to onsemi's line of supervisory circuits with integrated I2C EEPROM. These devices are designed to simplify system design by combining memory and supervision functions. The CAT1023 specifically includes a watchdog timer, distinguishing it from variants like the CAT1022 which lack this feature. This integration helps reduce component count and board space in compact electronic designs.

Supervisors Replacement Considerations

Direct replacements include other CAT1023 variants with different threshold voltages, such as CAT1023WI-30-G or CAT1023WI-45-G, if the voltage level differs. Cross-reference with CAT1021 or CAT1022 if write protection or watchdog features are not required. Verify pinout compatibility and electrical characteristics before substitution.