BU46L342G-TL Equivalent & Substitute Parts

Part Overview

The BU46L342G-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 BU46L342G-TL operates across the industrial temperature range of -40°C to 105°C and is packaged in a 3-SSOP (SC-59, SOT-23-3) surface mount configuration.

Substiute Parts

BU46L342G-TL

Rohm SemiconductorIn Stock: 1194BU46L342G-TL Datasheet

Current PartRFQ

BD46342G-TR

Rohm SemiconductorIn Stock: 802BD46342G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU46L342G-TL is based on functional equivalence across the following critical parameters:

• Single-channel voltage monitoring capability
• 3.4V voltage threshold setting
• Push-pull totem pole output configuration
• Active-low reset signal
• Industrial temperature range (-40°C to 105°C)
• Surface mount technology
• ROHS3 compliance

The BD46342G-TR qualifies as a manufacturer-recommended substitute based on matching these core functional and electrical specifications. Differences in package configuration (5-SSOP versus 3-SSOP), reset timeout duration (180ms versus 120ms), and moisture sensitivity level represent acceptable variations within the voltage detector category and do not affect core supervisory functionality.

Parameter Comparison

Engineering Selection Recommendations

The BD46342G-TR is the manufacturer-recommended substitute for the obsolete BU46L342G-TL. Both components maintain identical voltage threshold, output configuration, and reset polarity specifications. The substitute part carries active product status with current manufacturing support from Rohm Semiconductor, ensuring long-term availability and supply chain continuity.

Both parts maintain ROHS3 compliance and are suitable for industrial temperature applications. The BD46342G-TR features improved moisture sensitivity characteristics (MSL 1 versus MSL 3), providing enhanced reliability in humid environments. The extended reset timeout of the substitute (180ms versus 120ms) represents a functional enhancement that does not compromise supervisory performance in standard applications.

Package reconfiguration from 3-SSOP to 5-SSOP requires PCB layout modification. This change is a standard engineering consideration during component substitution and does not affect electrical functionality.

Frequently Asked Questions (FAQ)

Q: Can the BD46342G-TR directly replace the BU46L342G-TL without circuit modification?

A: Electrical functionality is preserved. However, the package change from 3-SSOP to 5-SSOP requires PCB footprint redesign. Pin configuration differences necessitate layout revision before implementation.

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

A: The BU46L342G-TL specifies 120ms minimum reset timeout, while the BD46342G-TR specifies 180ms minimum. Both values fall within acceptable ranges for voltage supervisor applications. The longer timeout of the substitute provides additional margin during power supply stabilization without affecting core supervisory function.

Q: Does the moisture sensitivity level difference impact reliability?

A: The BD46342G-TR features MSL 1 (unlimited moisture exposure) compared to the BU46L342G-TL MSL 3 (168-hour limit). This represents an improvement in component robustness, particularly for applications involving extended storage or humid operating environments.

Q: Are both parts suitable for the same voltage threshold applications?

A: Yes. Both components are configured for 3.4V threshold detection with identical push-pull totem pole output and active-low reset logic, making them functionally equivalent for single-channel voltage monitoring at this threshold level.

Q: What supply chain considerations apply to this substitution?

A: The BU46L342G-TL is obsolete with no ongoing manufacturing. The BD46342G-TR maintains active product status with current inventory availability, ensuring reliable procurement for new designs and production support.