BU46L482G-TL Equivalent & Substitute Parts

Part Overview

The BU46L482G-TL is a voltage supervisor IC manufactured by Rohm Semiconductor, designed for single-channel voltage monitoring applications. This component functions as a push-pull, totem pole output supervisor with active low reset capability. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

BU46L482G-TL

Rohm SemiconductorIn Stock: 923BU46L482G-TL Datasheet

Current PartRFQ

BD46482G-TR

Rohm SemiconductorIn Stock: 1067BD46482G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU46L482G-TL is determined by the following critical parameters:

• Single-channel voltage monitoring capability
• 4.8V voltage threshold detection
• Push-pull, totem pole output configuration
• Active low reset function
• Surface mount technology
• Operating temperature range of -40°C to 105°C
• RoHS3 compliance and REACH unaffected status

The BD46482G-TR qualifies as a manufacturer-recommended substitute based on matching these core functional and electrical parameters. While packaging and reset timeout specifications differ, the fundamental voltage detection and output characteristics remain compatible for equivalent circuit operation.

Parameter Comparison

Engineering Selection Recommendations

The BD46482G-TR is the manufacturer-recommended substitute for the obsolete BU46L482G-TL. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for applications requiring these certifications.

The BD46482G-TR offers improved moisture sensitivity characteristics (MSL 1 versus MSL 3), providing enhanced reliability in humid storage and operational environments. The extended reset timeout of 180ms in the BD46482G-TR accommodates applications requiring longer power-up sequencing compared to the 120ms specification of the original part.

Package differences exist between the two components: the BU46L482G-TL uses 3-SSOP (SOT-23-3) packaging, while the BD46482G-TR uses 5-SSOP (SOT-753) packaging. PCB layout modifications are required to accommodate the different pin configurations and package footprints.

Frequently Asked Questions (FAQ)

Q: Can the BD46482G-TR directly replace the BU46L482G-TL without circuit modifications?

A: The BD46482G-TR matches the core electrical specifications (voltage threshold, output configuration, reset function, and operating temperature range). However, the different package types (3-SSOP versus 5-SSOP) require PCB layout redesign and component footprint updates.

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

A: The BU46L482G-TL specifies a 120ms minimum reset timeout, while the BD46482G-TR specifies 180ms. This difference affects power-up sequencing timing. Applications with strict reset timing requirements must validate compatibility with the extended timeout of the substitute part.

Q: Why does the BD46482G-TR have a lower Moisture Sensitivity Level?

A: MSL 1 (unlimited moisture exposure) provides superior protection compared to MSL 3 (168-hour limit). The BD46482G-TR offers improved reliability in storage and operational environments with elevated humidity exposure.

Q: Are both parts compliant with current regulatory requirements?

A: Both the BU46L482G-TL and BD46482G-TR are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.

Q: What packaging considerations apply when substituting these components?

A: The BU46L482G-TL uses TO-236-3/SC-59/SOT-23-3 packaging with 3 pins, while the BD46482G-TR uses SC-74A/SOT-753 packaging with 5 pins. Pin assignments and PCB footprints differ significantly, requiring complete layout verification before implementation.