BD5251FVE-TR

Overview

The BD5251FVE-TR is a voltage detector manufactured by ROHM Semiconductor, designed for monitoring single-input power supply lines. It features an adjustable delay timer and operates within a reset active voltage range of 0.95 V to 10 V. The typical under-voltage detection threshold is 5.1 V with a precision of ±1%. The device utilizes an open-drain output type and maintains a low circuit current of 0.85 μA when the detection voltage is at 4.8 V. It supports a maximum power dissipation of 210 mW and functions reliably across a temperature range from -40°C to +105°C.

Feature Summary

• Incorporates an adjustable delay timer for customized reset timing control
• Provides high-precision voltage detection with ±1% accuracy tolerance
• Features an open-drain output configuration for flexible interface compatibility

Applications

• Monitoring power supply voltages in portable electronic devices
• Ensuring system stability in industrial control equipment
• Providing reset signals for microcontroller units during power-up sequences

Procurement Notes

This component is classified as obsolete and is no longer available for new orders. Verification of availability through authorized distributors is required, though stock is likely limited. Engineers should confirm end-of-life status with suppliers before finalizing designs. Alternative sourcing strategies must be evaluated immediately to prevent supply chain disruptions for existing production runs.

Selection Notes

Designers requiring this specific 5.1 V threshold with adjustable delay should consider the BD5250G-1 as a recommended replacement due to its similar pinout and package. Selection criteria must account for the open-drain output requirements and the operating voltage range up to 10 V. Thermal management considerations are necessary given the 210 mW power dissipation limit in the VSOF-5 package.

Part Context

The BD5251FVE-TR belongs to the BD52 series of voltage detectors from ROHM Semiconductor. This series focuses on providing reliable supervision for embedded systems with low power consumption characteristics. The part is housed in a compact VSOF-5 surface-mount package, suitable for space-constrained applications requiring precise voltage monitoring without manual reset capabilities.

Replacement Considerations

The BD5250G-1 is listed as a recommended replacement with the same pinout and package type. Designers should verify that the 5.0 V threshold of the substitute meets their application requirements instead of the original 5.1 V.