BU46K334G-TL Equivalent & Substitute Parts

Part Overview

The BU46K334G-TL is a voltage detector supervisor IC manufactured by Rohm Semiconductor, designed for single-channel voltage monitoring applications. This component features push-pull totem pole output configuration with active low reset functionality and a 240ms minimum reset timeout. The device is classified as obsolete, necessitating identification of equivalent alternatives for ongoing production and maintenance applications. Substitute parts must maintain functional compatibility across voltage threshold, output type, reset polarity, and operating temperature specifications.

Substiute Parts

BU46K334G-TL

Rohm SemiconductorIn Stock: 1040BU46K334G-TL Datasheet

Current PartRFQ

BD46335G-TR

Rohm SemiconductorIn Stock: 705BD46335G-TR Datasheet

MFR RecommendedRFQ

BU46L334G-TL

Rohm SemiconductorIn Stock: 7044BU46L334G-TL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BU46K334G-TL are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

• Voltage threshold: 3.3V (exact match required)
• Output configuration: Push-Pull, Totem Pole (exact match required)
• Reset polarity: Active Low (exact match required)
• Operating temperature range: -40°C ~ 105°C (exact match required)
• Mounting type: Surface Mount (exact match required)
• Single-channel voltage monitoring functionality

Allowable Variations:

• Package type: Different surface mount packages (3-SSOP to 5-SSOP) are acceptable provided PCB layout accommodates the physical dimensions
• Reset timeout: Variations in reset timeout are permitted if circuit design does not depend on the specific 240ms timing
• Moisture sensitivity level: Lower MSL ratings (improved moisture resistance) are acceptable
• Product status: Active or Not For New Designs status parts are acceptable alternatives to obsolete parts

Two substitute parts meet these criteria with documented compatibility.

Parameter Comparison

Engineering Selection Recommendations

BD46335G-TR (MFR Recommended Substitute): This part is the manufacturer-recommended alternative, carrying Active product status from Rohm Semiconductor. It maintains all critical electrical parameters including 3.3V threshold, push-pull totem pole output, and active low reset. The primary design consideration is the package transition from 3-SSOP to 5-SSOP, requiring PCB layout modification. The reset timeout specification differs (45ms versus 240ms), necessitating circuit design review to confirm compatibility with application timing requirements. The improved moisture sensitivity level (MSL 1) provides superior moisture resistance compared to the main part. ROHS3 and REACH compliance are maintained.

BU46L334G-TL (Parametric Equivalent): This part provides direct electrical and package compatibility with the BU46K334G-TL, maintaining identical 3-SSOP packaging, 240ms reset timeout, and all critical voltage and output specifications. The part carries Not For New Designs status, indicating it remains available but is not recommended for new product development. This substitute is optimal for maintenance and repair applications where package compatibility and reset timing are critical. Moisture sensitivity level and compliance certifications remain equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can BD46335G-TR be used as a direct drop-in replacement for BU46K334G-TL?

A: BD46335G-TR is electrically compatible but requires PCB layout modification due to package change from 3-SSOP to 5-SSOP. The reset timeout differs (45ms versus 240ms), requiring circuit design verification before implementation.

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

A: BU46L334G-TL maintains identical packaging (3-SSOP) and reset timeout (240ms) as the original part, enabling direct substitution. BD46335G-TR offers Active product status and improved moisture resistance but requires package redesign and reset timing evaluation.

Q: Is BU46L334G-TL suitable for new product designs?

A: BU46L334G-TL carries Not For New Designs status. For new designs, BD46335G-TR is the manufacturer-recommended option with Active product status.

Q: What are the critical parameters that must match for substitution?

A: Voltage threshold (3.3V), output configuration (push-pull totem pole), reset polarity (active low), operating temperature range (-40°C to 105°C), and single-channel monitoring functionality must remain unchanged for functional compatibility.

Q: Does the reset timeout difference between BU46K334G-TL and BD46335G-TR affect compatibility?

A: Reset timeout differences must be evaluated against specific circuit requirements. If the application design depends on the 240ms timing characteristic, BD46335G-TR's 45ms timeout may not be suitable without circuit modification.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All parts listed (BU46K334G-TL, BD46335G-TR, and BU46L334G-TL) are ROHS3 Compliant and REACH Unaffected.