BU4311FVE-TR

Overview

The BU4311FVE-TR is a single-channel voltage detector manufactured by ROHM Semiconductor, designed for monitoring power supply integrity in electronic systems. It operates within a supply voltage range of 0.7 V to 7 V and features an adjustable reset delay timer. The device provides a CMOS output with a typical threshold voltage of 1.1 V and high accuracy of ±1%. It consumes a low operating current of 550 nA and functions reliably across a temperature range of -40°C to +125°C. Packaged in a compact VSOF-5 surface-mount format, it supports automated assembly processes.

Feature Summary

• Adjustable reset delay timer allows customization of response timing relative to voltage transitions.
• CMOS output interface ensures compatibility with standard digital logic circuits without additional buffering.
• Low static current consumption minimizes power drain during standby or active monitoring states.
• High detection accuracy ensures precise voltage threshold identification for reliable system protection.

Applications

• Portable battery-powered devices requiring efficient power management
• Embedded systems needing reliable brown-out protection
• Industrial control units operating in wide temperature environments

Procurement Notes

Verify component authenticity through authorized distributors due to obsolete status. Confirm RoHS compliance documentation matches specific manufacturing batches. Validate package marking against official datasheet specifications to prevent counterfeit substitution. Ensure storage conditions maintain moisture sensitivity level integrity prior to reflow soldering.

Selection Notes

Select this component when a fixed 1.1 V threshold with adjustable delay is required. Compare against BD5211G-1 for pin-compatible alternatives if availability is critical. Consider the VSOF-5 footprint constraints during PCB layout. Evaluate thermal performance within the specified operating temperature range for target applications.

Part Context

Part of the BU42(43)xxFVE series, this voltage detector integrates simple reset functionality without manual reset or watchdog features. It replaces older SOP-4 variants like BU4311F-TR with a more compact surface-mount package. The series focuses on low-cost, high-reliability supervision for consumer and industrial electronics.

Replacement Considerations

BD5211G-1 is listed as a recommended replacement with similar specifications and pinout compatibility.