BU46L274G-TL Equivalent & Substitute Parts

Part Overview

The BU46L274G-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. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The BU46L274G-TL operates across the industrial temperature range of -40°C to 105°C and is packaged in a 3-SSOP surface mount configuration.

Substiute Parts

BU46L274G-TL

Rohm SemiconductorIn Stock: 739BU46L274G-TL Datasheet

Current PartRFQ

BD46275G-TR

Rohm SemiconductorIn Stock: 1667BD46275G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU46L274G-TL is determined by the following critical parameters that must remain consistent:

• Voltage threshold specification (2.7V)
• Output configuration (Push-Pull, Totem Pole)
• Reset polarity (Active Low)
• Operating temperature range (-40°C to 105°C)
• Single-channel voltage monitoring functionality
• Surface mount technology
• RoHS3 compliance

The BD46275G-TR qualifies as a manufacturer-recommended substitute based on matching these core electrical and functional parameters. Variations in reset timeout duration, package form factor (3-SSOP versus 5-SSOP), and moisture sensitivity level do not preclude substitution when the primary monitoring and output characteristics align.

Parameter Comparison

Engineering Selection Recommendations

The BD46275G-TR is the manufacturer-recommended substitute for the obsolete BU46L274G-TL. Both components maintain identical voltage threshold, output topology, and reset polarity specifications, ensuring functional equivalence in voltage detection applications.

The BD46275G-TR offers the advantage of active product status, ensuring continued availability and supply chain reliability. The substitute component features improved moisture sensitivity characteristics (MSL 1 versus MSL 3), providing enhanced reliability in storage and handling environments.

The reset timeout differential (45ms versus 240ms) must be evaluated within the context of the specific application circuit. If the 240ms reset timeout of the original part is a critical design requirement, this parameter difference requires circuit-level assessment before substitution.

Both components carry ROHS3 compliance and REACH unaffected status, maintaining regulatory alignment with current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the BD46275G-TR directly replace the BU46L274G-TL without circuit modifications?

A: The BD46275G-TR matches the critical electrical parameters (voltage threshold, output configuration, reset polarity, and operating temperature range) required for voltage detection functionality. However, the reset timeout specification differs (45ms versus 240ms). Circuit-level verification is necessary if the original reset timeout is a design constraint.

Q: What is the significance of the package change from 3-SSOP to 5-SSOP?

A: The package transition from 3-SSOP (TO-236-3, SC-59, SOT-23-3) to 5-SSOP (SC-74A, SOT-753) represents a physical form factor change. PCB layout modifications and component placement adjustments are required. The additional pins in the 5-SSOP package do not affect the single-channel voltage monitoring function but require design accommodation.

Q: Why is the moisture sensitivity level different between these parts?

A: The BD46275G-TR features MSL 1 (unlimited moisture exposure tolerance) compared to the BU46L274G-TL MSL 3 (168-hour limit). This improvement in the substitute part provides enhanced reliability during storage, handling, and assembly processes without affecting functional performance.

Q: Are both parts RoHS compliant?

A: Yes, both the BU46L274G-TL and BD46275G-TR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the availability status of each part?

A: The BU46L274G-TL is classified as obsolete with limited inventory (656 pieces). The BD46275G-TR is an active product with higher inventory availability (1570 pieces), supporting long-term supply chain continuity.