BU46K382G-TL Equivalent & Substitute Parts

Part Overview

The BU46K382G-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 BU46K382G-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

BU46K382G-TL

Rohm SemiconductorIn Stock: 973BU46K382G-TL Datasheet

Current PartRFQ

BD46382G-TR

Rohm SemiconductorIn Stock: 753BD46382G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU46K382G-TL is determined by the following critical parameters:

• Voltage Threshold: Must match 3.8V for direct functional equivalence
• Output Configuration: Push-pull totem pole output is required for circuit compatibility
• Reset Function: Active-low reset operation must be maintained
• Operating Temperature Range: Must support -40°C to 105°C minimum
• Mounting Type: Surface mount requirement must be preserved
• Single-Channel Monitoring: Voltage detector with one monitored channel

The BD46382G-TR satisfies these core substitution criteria while offering improved product status and enhanced reliability characteristics through superior moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

The BD46382G-TR is the manufacturer-recommended substitute for the obsolete BU46K382G-TL. Both components maintain identical voltage threshold (3.8V), output configuration (push-pull totem pole), reset polarity (active low), and operating temperature range (-40°C to 105°C). The substitute part offers significant advantages through active product status, ensuring long-term availability and manufacturing support.

The BD46382G-TR provides superior moisture sensitivity characteristics (MSL 1 versus MSL 3), reducing risk in high-humidity storage and assembly environments. The extended reset timeout (180ms versus 120ms) accommodates applications requiring longer power-up sequencing intervals. Both components maintain ROHS3 compliance and REACH unaffected status.

Package differences exist between the 3-SSOP (BU46K382G-TL) and 5-SSOP (BD46382G-TR) configurations. PCB layout modifications are required to accommodate the different pin counts and footprints. Design validation is necessary to confirm functional equivalence within the specific application circuit.

Frequently Asked Questions (FAQ)

Q: Can BD46382G-TR directly replace BU46K382G-TL without circuit modifications?

A: Functional equivalence is established through matching voltage threshold, output configuration, and reset characteristics. However, package differences (3-SSOP versus 5-SSOP) require PCB layout redesign and footprint updates. Pin assignments must be verified against both datasheets before implementation.

Q: What is the significance of the reset timeout difference (120ms versus 180ms)?

A: The reset timeout defines the minimum duration the reset output remains asserted after power supply stabilization. The BD46382G-TR's 180ms timeout provides extended power-up sequencing capability. Applications with strict timing requirements must evaluate whether this extended interval affects system initialization behavior.

Q: Why is the moisture sensitivity level improvement important?

A: MSL 3 (168 hours) versus MSL 1 (unlimited) reflects component robustness in humid environments. The BD46382G-TR's superior rating reduces moisture absorption risk during storage and assembly, particularly in high-humidity manufacturing facilities or tropical climates.

Q: Are both parts RoHS and REACH compliant?

A: Both BU46K382G-TL and BD46382G-TR are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for EU and global markets.

Q: What packaging format differences exist?

A: The BU46K382G-TL is supplied in cut tape (CT) format, while the BD46382G-TR is supplied in tape and reel (TR) format. TR packaging is standard for production volumes and automated assembly processes.