BU4214F-TR

Overview

The BU4214F-TR is a CMOS voltage detector manufactured by ROHM Semiconductor, designed for monitoring single power supply rails. It features an adjustable delay timer and an open-drain output active low. The typical under-voltage detection threshold is 1.4 V with ±1% precision. The reset active voltage range spans from 0.7 V to 7 V, supporting a maximum operating voltage of 7 V. Circuit current consumption is approximately 0.40 μA at VDET=4.8V when active and 0.55 μA when off. Hysteresis is set at VDET x 0.05. It operates within a temperature range of -40°C to 125°C and is housed in a compact SOP-4 package.

Feature Summary

• Adjustable delay timer functionality allows customization of reset timing via external components.
• Open-drain output structure provides flexibility for interfacing with various logic levels.
• High accuracy detection ensures reliable system supervision with minimal threshold deviation.

Applications

• Microprocessor and microcontroller power supply supervision
• Battery-operated equipment low-voltage indication
• Portable electronic device power management

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet before procurement. Confirm RoHS compliance status and check for end-of-life or last-time-buy notices directly with the manufacturer or authorized distributors. Ensure the selected component matches the required thermal and electrical specifications for the target application environment.

Selection Notes

Select this component when a precise 1.4 V detection threshold with adjustable delay is required. Consider the SOP-4 package constraints and the open-drain output requirements. Evaluate the circuit current consumption against battery life expectations. Verify compatibility with the system's operating voltage range and temperature conditions.

Part Context

The BU4214F belongs to the BU42xx series of voltage detectors from ROHM Semiconductor. This series is characterized by low power consumption and high accuracy. The BU4214F specifically targets applications requiring a 1.4 V threshold. It is part of a broader family that includes variants with different thresholds and packages, such as the BU4211G and BU4213FVE.

Replacement Considerations

The BD5214G-1 is documented as a recommended replacement with the same pinout and similar electrical characteristics, including a 1.4 V detection voltage and adjustable delay. Note that the BD5214G-1 uses an SSOP-5 package compared to the SOP-4 of the BU4214F, requiring layout adaptation.