BD4857FVE-TR

Overview

The BD4857FVE-TR is a single-channel voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply integrity. It features a typical under-voltage detection threshold of 5.7 V with a precision of ±1%. The device operates within a reset active voltage range of 0.95 V to 10 V and utilizes an open-drain output type. Key electrical parameters include a maximum supply voltage of 10 V, a reset delay timer of no adjustable delay, and low circuit current consumption of 0.60 μA in the ON state at VDET=4.8 V. It functions across a temperature range of -40 °C to +105 °C.

Feature Summary

• Provides precise under-voltage detection with high accuracy for reliable power supply monitoring
• Features low power consumption suitable for battery-operated or energy-efficient applications
• Utilizes an open-drain output configuration for flexible interface compatibility

Applications

• Power supply supervision in embedded systems
• Voltage monitoring in portable electronic devices
• System reset generation in microcontroller circuits

Procurement Notes

Verify component authenticity through authorized channels as this part may be obsolete. Confirm package type VSOF-5 and RoHS compliance. Check datasheet for specific ordering suffixes and replacement recommendations from the manufacturer. Ensure storage conditions meet semiconductor standards to prevent degradation.

Selection Notes

Select this component when a fixed 5.7 V detection threshold is required. Consider the open-drain output for level shifting needs. Evaluate the low standby current for power-sensitive designs. Verify thermal performance within the specified operating temperature range for the target application environment.

Part Context

This component belongs to the BD48 series of standard voltage detectors from ROHM Semiconductor. It is part of a family of supervisory circuits designed for compact surface-mount applications. The VSOF-5 package allows for space-constrained PCB layouts. The series emphasizes low power consumption and high precision for modern electronic systems.

Replacement Considerations

The BD5250G-1 is listed as a similar specification replacement. Verify pinout compatibility and electrical parameter alignment before substitution. The alternative uses an SSOP-5 package, requiring layout adjustment.