BU4319F-TR

Overview

The BU4319F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for low-voltage monitoring applications. It features a fixed threshold voltage of 1.9 V with an overvoltage threshold of 1.919 V and high accuracy of 1%. The device operates within a supply voltage range of 0.7 V to 7 V and consumes a typical operating current of 550 nA, with a static current of 350 nA. It provides an adjustable reset delay time and utilizes a CMOS output type without manual reset or watchdog timer functions. The component is housed in a SOP-4 package and supports surface mount installation, functioning reliably across a temperature range of -40°C to +125°C.

Feature Summary

• CMOS output structure enabling low power consumption and direct interface with digital logic circuits
• Adjustable reset delay timer allowing customizable response timing via external components
• High detection accuracy of 1% ensures precise voltage monitoring under varying conditions

Applications

• Portable electronic devices requiring low standby current
• Battery-powered systems needing reliable under-voltage detection
• Microcontroller reset circuits in industrial environments

Procurement Notes

Verify the obsolete status and last-time-buy availability before procurement. Confirm package compatibility and thermal requirements against design specifications. Ensure sourcing from authorized distributors to guarantee authenticity and traceability for quality assurance purposes.

Selection Notes

Select this component when a fixed 1.9 V threshold with adjustable delay is required. Consider the SOP-4 package constraints and CMOS output drive capabilities. Evaluate the 550 nA operating current against system power budgets and verify temperature range suitability for the intended application environment.

Part Context

This part belongs to the BU42(43)xxF series of supervisory circuits from ROHM Semiconductor. It is specifically engineered as a low-voltage detector with adjustable delay characteristics. The series targets applications demanding high accuracy and low power consumption in compact surface-mount packages.

Replacement Considerations

BU4319G-TR offers similar functionality in an SSOP-5 package.