CAT1640WI-28-GT3

Supervisors Overview

The CAT1640WI-28-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring power supply voltages in electronic systems. It operates within a supply voltage range of 2.7 V to 5.5 V and features a fixed threshold voltage of 2.8 V. The device includes an over-voltage detection capability with a threshold of 3 V and an under-voltage threshold of 2.85 V. It supports manual reset functionality and incorporates a watchdog timer for system reliability. The component is housed in an 8-SOIC package suitable for surface mount installation. It functions as a single-input supervisor with open-drain or open-collector output capabilities.

Supervisors Feature Summary

• Provides continuous monitoring of a single power supply input channel to ensure system stability.
• Integrates both under-voltage and over-voltage detection mechanisms for comprehensive power supervision.
• Includes a built-in watchdog timer to detect software faults and trigger system resets.
• Supports manual reset input allowing external control over the reset signal generation.

Supervisors Applications

• CPU power supply monitoring in embedded computing systems
• Voltage supervision for microcontroller units requiring reliable power-on reset
• Watchdog timer implementation in industrial control applications

Supervisors Procurement Notes

Verify component authenticity through authorized distributors due to potential counterfeit risks. Confirm RoHS compliance status via official documentation before integration. Check current production status as end-of-life notices may affect long-term availability. Ensure packaging specifications match assembly requirements. Validate datasheet revisions against design specifications to avoid functional mismatches.

Supervisors Selection Notes

Select this component when a single-channel voltage supervisor with integrated watchdog functionality is required. Consider the 2.8 V threshold compatibility with target logic levels. Evaluate the SOIC-8 package constraints against PCB layout limitations. Assess the need for manual reset inputs versus automatic power-on reset only. Verify operating temperature range suitability for the intended environmental conditions.

Supervisors Part Context

This part belongs to the CAT1640 series of supervisory circuits from onsemi. The series offers various threshold options and package configurations. The CAT1640 family provides reliable power management solutions for industrial and consumer electronics. It complements other PMIC offerings in the manufacturer's standard product portfolio focused on system protection and monitoring.

Supervisors Replacement Considerations

CAT1640WI-42-GT3 serves as a public confirmed substitute with different threshold characteristics. Verify electrical parameter compatibility before substitution. Ensure pinout and package dimensions remain identical for direct replacement. Review functional differences in reset timing and watchdog behavior between variants.