BU4346F-TR Equivalent & Substitute Parts

Part Overview

The BU4346F-TR is a supervisor integrated circuit designed for power management applications, specifically functioning as a voltage detector with push-pull output configuration. This device monitors a single voltage threshold at 4.6V and provides active-low reset signaling. The BU4346F-TR is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

BU4346F-TR

Rohm SemiconductorIn Stock: 1042BU4346F-TR Datasheet

Current PartRFQ

BU4346G-TR

ROHM SemiconductorIn Stock: 939BU4346G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU4346F-TR is determined by the following critical parameters that must remain consistent:

• Voltage Threshold: 4.6V (single voltage monitoring point)
• Output Type: Push-Pull, Totem Pole configuration
• Reset Logic: Active Low
• Reset Timeout: Adjustable/Selectable
• Operating Temperature Range: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Base Product Number: BU4346 (same device family)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The BU4346G-TR qualifies as a direct substitute based on matching all critical electrical and functional parameters. While the package format differs (5-SSOP versus 4-SOP), both are surface-mount packages within the same product family and maintain identical electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The BU4346G-TR is the designated substitute for the obsolete BU4346F-TR. Selection of this alternative is supported by:

• Functional Equivalence: Identical electrical specifications including voltage threshold, output configuration, reset logic, and operating temperature range
• Active Product Status: BU4346G-TR maintains active production status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements
• Package Compatibility: Both devices are surface-mount packages within the same product family, with pin-compatible functionality despite different package formats (4-SOP to 5-SSOP)

Frequently Asked Questions (FAQ)

Q: Can the BU4346G-TR directly replace the BU4346F-TR in existing designs?

A: Yes. The BU4346G-TR provides electrical equivalence across all critical parameters: 4.6V threshold, push-pull totem pole output, active-low reset, and adjustable/selectable reset timeout. Both devices operate across the same temperature range (-40°C ~ 125°C) and maintain identical regulatory compliance.

Q: What is the primary difference between these two parts?

A: The main difference is package format. The BU4346F-TR uses a 4-SOP package (SC-82), while the BU4346G-TR uses a 5-SSOP package (SC-74A, SOT-753). Both are surface-mount packages. The BU4346G-TR is currently in active production, whereas the BU4346F-TR is obsolete.

Q: Are there any pin configuration differences?

A: While both devices are within the same BU4346 product family with identical electrical function, the package format change from 4-SOP to 5-SSOP requires PCB layout verification. Pin assignments must be confirmed against the respective device datasheets prior to implementation.

Q: What is the availability status of each part?

A: The BU4346F-TR is obsolete with limited remaining inventory (990 pcs reported). The BU4346G-TR is actively produced by ROHM Semiconductor with current inventory availability (838 pcs reported), providing reliable long-term supply.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both the BU4346F-TR and BU4346G-TR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.