MC33261P

Overview

The MC33261P is a voltage supervisor integrated circuit manufactured by onsemi, designed to monitor power supply voltages and generate reset signals for microprocessors and other digital logic. It operates within a specified input voltage range and provides a stable threshold detection capability. The device features an open-drain output suitable for interfacing with various logic families. It includes internal delay circuits to ensure reliable operation during power-up and power-down transitions, preventing false resets due to transient noise or slow voltage ramps.

Feature Summary

• Monitors single power supply voltage with precise threshold detection
• Provides active-low reset signal via open-drain output
• Includes programmable reset delay for controlled power sequencing
• Ensures system stability through manual reset input capability

Applications

• Microprocessor and microcontroller power supply monitoring
• Digital logic circuit reset generation
• Embedded systems power management
• Industrial control board supervision

Procurement Notes

Verify the specific suffix of the part number to confirm package type and tape/reel specifications. Confirm RoHS compliance status if required for your assembly process. Check the manufacturer's latest datasheet for any updates to electrical characteristics or recommended operating conditions before finalizing design integration.

Selection Notes

Select this component when a dedicated voltage supervisor with manual reset capability is required. Ensure the monitored voltage level falls within the device's operational range. Consider the reset delay time requirements for your system's power-up sequence. Verify that the open-drain output configuration matches your logic interface needs.

Part Context

This part belongs to onsemi's family of voltage supervisor ICs. These devices are commonly used in applications requiring reliable power management and system reset functions. The MC33261P specifically offers a balance of precision and flexibility for general-purpose monitoring tasks in consumer and industrial electronics.

Replacement Considerations

Consult official cross-reference lists for direct pin-compatible alternatives. Verify that any substitute maintains identical threshold voltages, output polarity, and package dimensions. Ensure functional equivalence in terms of reset delay and manual reset input behavior before implementation.