BU46K462G-TL Equivalent & Substitute Parts

Part Overview

The BU46K462G-TL is a voltage detector supervisor IC manufactured by Rohm Semiconductor, designed for single-channel voltage monitoring applications. This component operates as a push-pull, totem pole output supervisor with active-low reset functionality. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The BU46K462G-TL is packaged in a 3-SSOP (TO-236-3, SC-59, SOT-23-3) surface mount configuration.

Substiute Parts

BU46K462G-TL

Rohm SemiconductorIn Stock: 952BU46K462G-TL Datasheet

Current PartRFQ

BD46462G-TR

Rohm SemiconductorIn Stock: 1203BD46462G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU46K462G-TL is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage threshold matching at 4.6V
• Output configuration as push-pull, totem pole
• Active-low reset function
• Single-channel voltage monitoring capability
• Operating temperature range of -40°C ~ 105°C

Mechanical Compatibility Criteria:

• Surface mount technology
• Package classification within SSOP family (3-SSOP or 5-SSOP acceptable for functional equivalence)

Regulatory & Compliance Criteria:

• ROHS3 compliance
• REACH unaffected status
• EAR99 ECCN classification

The BD46462G-TR qualifies as a manufacturer-recommended substitute based on matching all critical electrical parameters and maintaining regulatory compliance. The transition from 3-SSOP to 5-SSOP packaging represents a functional upgrade with improved moisture sensitivity characteristics.

Parameter Comparison

Engineering Selection Recommendations

The BD46462G-TR is the manufacturer-recommended substitute for the obsolete BU46K462G-TL. Selection of this substitute is supported by the following factors:

Product Status: The BD46462G-TR maintains active product status with Rohm Semiconductor, ensuring continued availability and manufacturing support. The BU46K462G-TL is classified as obsolete, necessitating transition to an active alternative.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements. Both are classified under EAR99 export control.

Electrical Equivalence: The BD46462G-TR preserves all critical electrical parameters including 4.6V threshold voltage, push-pull totem pole output, active-low reset, and -40°C ~ 105°C operating temperature range.

Packaging Transition: The shift from 3-SSOP to 5-SSOP packaging requires PCB layout modification. The 5-SSOP package offers improved moisture sensitivity characteristics (MSL 1 versus MSL 3), reducing moisture-related reliability risks during storage and assembly.

Reset Timeout Consideration: The BD46462G-TR specifies a 180ms minimum reset timeout compared to 120ms for the BU46K462G-TL. This extended timeout must be evaluated against system reset timing requirements.

Frequently Asked Questions (FAQ)

Q: Can the BD46462G-TR be used as a direct pin-for-pin replacement?

A: No. While electrically equivalent, the BD46462G-TR uses a 5-SSOP package (SC-74A, SOT-753) compared to the 3-SSOP package (TO-236-3, SC-59, SOT-23-3) of the BU46K462G-TL. PCB layout and footprint modifications are required.

Q: What is the impact of the 180ms reset timeout on the BD46462G-TR versus 120ms on the BU46K462G-TL?

A: The extended reset timeout of the BD46462G-TR affects system reset sequencing. Applications requiring faster reset assertion must verify compatibility with the 180ms specification.

Q: Does the improved moisture sensitivity (MSL 1) of the BD46462G-TR provide practical benefits?

A: Yes. MSL 1 (unlimited moisture sensitivity level) eliminates moisture-related storage and handling constraints present with MSL 3 (168 hours). This reduces production risk and simplifies supply chain management.

Q: Are there any regulatory or compliance differences between these parts?

A: No. Both components maintain identical ROHS3 compliance, REACH unaffected status, and EAR99 export classification.

Q: What design considerations apply when transitioning from BU46K462G-TL to BD46462G-TR?

A: PCB footprint redesign is mandatory due to package change from 3-SSOP to 5-SSOP. Reset timing verification is required to confirm system compatibility with the 180ms minimum timeout specification.