BU4815FVE-TR Equivalent & Substitute Parts

Part Overview

The BU4815FVE-TR is a supervisor integrated circuit from Rohm Semiconductor designed for power management applications. It functions as a simple reset/power-on reset device with open drain or open collector output, monitoring a single voltage channel at a 1.5V threshold. The device operates across the industrial temperature range of -40°C to 125°C and is packaged in a 5-VSOF surface mount configuration.

This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity. Substitute parts must maintain compatibility across electrical specifications, output characteristics, and thermal operating ranges while accommodating different package formats.

Substiute Parts

BU4815FVE-TR

Rohm SemiconductorIn Stock: 26419BU4815FVE-TR Datasheet

Current PartRFQ

BU4814G-TR

Rohm SemiconductorIn Stock: 5599BU4814G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BU4815FVE-TR are identified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Single voltage channel monitoring capability
• Open drain or open collector output configuration
• Active low reset logic
• Operating temperature range of -40°C to 125°C or wider
• Threshold voltage within acceptable tolerance for supervisor applications

Mechanical Compatibility Criteria:

• Surface mount technology
• Compatible package footprint or pinout arrangement
• RoHS3 compliance and MSL rating suitable for standard handling

The BU4814G-TR qualifies as a direct substitute based on these parameters. Although it features a different package format (5-SSOP vs. 5-VSOF) and a slightly lower threshold voltage (1.4V vs. 1.5V), both devices maintain the same functional architecture, output characteristics, and thermal specifications required for supervisor circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The BU4814G-TR is the designated substitute for the obsolete BU4815FVE-TR. Both devices are manufactured by Rohm Semiconductor and maintain identical functional specifications for supervisor circuit applications.

Compliance and Certification Status: Both parts carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. MSL rating of 1 (Unlimited) indicates standard moisture handling procedures are sufficient for both components.

Product Status Consideration: The BU4815FVE-TR is obsolete, while the BU4814G-TR maintains active production status. This distinction ensures long-term availability and supply chain stability for new designs or system updates.

Package Format Transition: The primary difference between these parts is the package format: the main part uses SOT-665 (5-VSOF), while the substitute uses SC-74A/SOT-753 (5-SSOP). PCB layout modifications and component placement adjustments are required to accommodate this package change. Both are surface mount technologies with comparable thermal and electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the BU4814G-TR directly replace the BU4815FVE-TR without circuit modifications?

A: The BU4814G-TR is electrically equivalent but requires PCB layout changes due to different package formats. The 5-VSOF and 5-SSOP packages have different footprints and pin arrangements. Schematic functionality remains unchanged; only physical placement and PCB routing require adjustment.

Q: What is the significance of the threshold voltage difference (1.5V vs. 1.4V)?

A: Both threshold voltages fall within the standard operating range for single-channel supervisor applications. The 0.1V difference is typical between device variants in the same product family and does not affect functional compatibility in most applications. System designers should verify threshold voltage requirements against their specific power supply monitoring specifications.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both the BU4815FVE-TR and BU4814G-TR operate across -40°C to 125°C, meeting industrial temperature requirements. MSL rating of 1 (Unlimited) for both parts indicates no moisture sensitivity restrictions during standard handling and storage.

Q: Why is the BU4815FVE-TR obsolete while the BU4814G-TR remains active?

A: Product lifecycle management by Rohm Semiconductor has transitioned the BU4815FVE-TR to obsolete status while maintaining the BU4814G-TR in active production. This reflects manufacturing optimization and market demand. The BU4814G-TR provides equivalent functionality with continued supply availability.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected. ECCN classification is EAR99 for both devices, and HTSUS code 8542.39.0001 applies to both. These certifications ensure compliance with current environmental regulations and export control requirements.