BU4345F-TR

Overview

The BU4345F-TR is a voltage detector with an adjustable delay time, manufactured by ROHM Semiconductor. It features a typical under-voltage detection voltage of 4.5 V with ±1% precision. The reset active voltage range spans from 0.7 V to 7 V, utilizing a CMOS open-drain output type. The device operates within a temperature range of -40°C to +125°C and consumes 0.40 μA in the on state (at Vdet=4.8V) and 0.55 μA in the off state. It is housed in an SSOP-5 package.

Feature Summary

• Adjustable reset delay timer functionality
• CMOS open-drain output configuration
• Low power consumption design

Applications

• Embedded system power monitoring
• Microcontroller reset circuitry
• Battery-powered device supervision

Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when ordering. Confirm the exact threshold voltage variant matches the application requirement, as the BU43xx series offers multiple detection voltages. Ensure the SSOP-5 footprint aligns with the PCB layout specifications before finalizing procurement.

Selection Notes

Select this component for applications requiring precise voltage monitoring with customizable reset timing. The low standby current makes it suitable for battery-operated systems. Verify that the open-drain output compatibility matches the downstream logic levels. Consider the operating temperature range to ensure reliability in the intended environment.

Part Context

This part belongs to the BU43xx series of voltage detectors from ROHM Semiconductor. These devices are designed for supervisory circuits in portable electronics and industrial equipment. The series typically offers various detection voltages and packages to suit different design constraints.

Replacement Considerations

The BD5245G-1 is listed as a similar level replacement with the same pinout. Verify electrical parameters and package dimensions before substitution.