BU4312F-TR

Overview

The BU4312F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-channel power supply voltages. It features an adjustable reset delay timer and operates within a supply voltage range of 0.7 V to 7 V. The device provides a typical under-voltage detection threshold of 1.2 V with ±1% accuracy. It utilizes an SSOP-5 package and supports surface mount installation. The component functions without manual reset or watchdog capabilities, maintaining low static current consumption suitable for battery-powered applications.

Feature Summary

• CMOS output type ensures compatibility with digital logic circuits
• Adjustable reset delay time allows customization of response timing
• Low static current consumption extends battery life in portable devices

Applications

• Portable electronic equipment requiring low power supervision
• Battery-operated systems needing voltage level monitoring
• General purpose power supply support circuits

Procurement Notes

Verify the specific suffix TR indicates reel packaging when sourcing. Confirm RoHS compliance status through official documentation as required by project specifications. Check lifecycle status carefully as this part may be designated as not recommended for new designs. Ensure the SSOP-5 footprint matches the target PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this component when a CMOS output interface is preferred over open-drain configurations. Consider the adjustable delay feature if precise timing control is necessary for system startup sequences. Evaluate the 1.2 V detection threshold against the minimum operating voltage requirements of the monitored circuitry to ensure reliable operation across the specified temperature range.

Part Context

This component belongs to the BU42(43)xxG series of voltage detectors from ROHM Semiconductor. It serves as a supervisory circuit within the PMIC category, specifically tailored for low-voltage detection tasks. The device integrates essential monitoring functions into a compact surface-mount package, supporting industrial and commercial temperature ranges for versatile deployment.

Replacement Considerations

The BD5212G-1 is identified as a same-pinout replacement option. Verify that the open-drain output of the substitute matches the system requirements, as the original BU4312F-TR uses a CMOS output. Confirm package dimensions and electrical characteristics align with existing design constraints before substitution.