BU46K472G-TL Equivalent & Substitute Parts

Part Overview

The BU46K472G-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 BU46K472G-TL belongs to the BU46Kxxx series and is packaged in a 3-SSOP (TO-236-3, SC-59, SOT-23-3) surface mount configuration.

Substiute Parts

BU46K472G-TL

Rohm SemiconductorIn Stock: 885BU46K472G-TL Datasheet

Current PartRFQ

BD46472G-TR

Rohm SemiconductorIn Stock: 753BD46472G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU46K472G-TL is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Single-channel voltage monitoring capability
• 4.7V threshold voltage matching
• Push-pull, totem pole output configuration
• Active-low reset functionality
• Operating temperature range of -40°C to 105°C

Mechanical Compatibility Criteria:

• Surface mount technology
• Pin count and footprint compatibility
• Package classification within acceptable form factors

The BD46472G-TR qualifies as a manufacturer-recommended substitute based on matching all electrical parameters. However, this substitute introduces a package change from 3-SSOP to 5-SSOP, which requires PCB layout verification. The reset timeout specification differs (180ms minimum versus 120ms minimum), representing a functional variation that must be evaluated against system requirements.

Parameter Comparison

Engineering Selection Recommendations

The BD46472G-TR is the manufacturer-recommended substitute for the obsolete BU46K472G-TL. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute offers improved moisture sensitivity characteristics (MSL 1 versus MSL 3), providing enhanced reliability in humid storage and operational environments.

The primary design consideration is the package transition from 3-SSOP to 5-SSOP. This change requires PCB footprint modification and layout verification to ensure proper signal integrity and thermal management. The reset timeout increase from 120ms to 180ms must be evaluated against system timing requirements to confirm functional compatibility.

Both components are manufactured by Rohm Semiconductor and share identical electrical specifications for voltage threshold, output configuration, and operating temperature range, supporting direct functional substitution when mechanical constraints are addressed.

Frequently Asked Questions (FAQ)

Q: Can the BD46472G-TR be used as a direct drop-in replacement for the BU46K472G-TL?

A: Electrical substitution is supported; however, mechanical substitution requires PCB redesign. The package change from 3-SSOP to 5-SSOP necessitates footprint modification and layout verification before implementation.

Q: What is the significance of the reset timeout difference between these parts?

A: The BU46K472G-TL specifies a 120ms minimum reset timeout, while the BD46472G-TR specifies 180ms minimum. System designs dependent on faster reset response times must evaluate whether the extended timeout meets application requirements.

Q: How does the moisture sensitivity level (MSL) difference affect component selection?

A: The BD46472G-TR offers superior moisture handling (MSL 1, unlimited shelf life) compared to the BU46K472G-TL (MSL 3, 168-hour limit). This improvement reduces moisture-related reliability risks during storage and manufacturing processes.

Q: Are both parts compliant with current regulatory standards?

A: Both the BU46K472G-TL and BD46472G-TR maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: What packaging formats are available for the BD46472G-TR substitute?

A: The BD46472G-TR is supplied in Tape & Reel (TR) packaging in a 5-SSOP configuration (SC-74A, SOT-753 case style).