BD3427K-E2 - Audio Special Purpose IC | ROHM Semiconductor
Teilenummer: BD3427K-E2 ✗ AbgekündigtBD3427K-E2 Übersicht
What is an audio special-purpose IC? An audio special-purpose IC is an integrated circuit designed for a defined audio-signal task rather than a general-purpose analog or digital function. Within the broader product hierarchy, it belongs to the amplifier IC and audio signal-processing categories, which are part of integrated circuits used in audio systems. The BD3427K-E2 is specifically listed under Audio Special Purpose and Audio Channel classifications in verified distributor information.
The key verified product features are the 44-LQFP package, tape-and-reel packaging, ROHM Semiconductor branding, and availability references from multiple distributors. One distributor listing identifies the package as 44LQFP and provides a unit price of $2.9084. Another distributor describes the part as ROHS3 compliant, while additional listings report quantities of 4,359 and 32,800 units. These observations should be confirmed against the manufacturer datasheet and current authorized-distributor inventory before design release.
The part is relevant to audio-channel designs where a dedicated audio IC, compact surface-mount construction, and distributor availability are important. Because the supplied excerpts do not expose the internal block diagram, signal path, channel count, power-supply voltage, control interface, or thermal characteristics, engineers should treat it as an obsolete or legacy sourcing candidate until those parameters are independently confirmed.
The main design consideration is not to assume generic audio-amplifier compatibility from the package name alone. Pin mapping, exposed-pad requirements, supply sequencing, output load, and thermal performance must be matched to the manufacturer documentation. This page distinguishes verified observations from missing technical data and avoids presenting unsupported electrical claims as facts.
This page combines the supplied distributor records, package information, pricing reference, sourcing observations, and a structured verification checklist. It is intended to support initial BOM research while directing engineers to the authoritative manufacturer documentation for final qualification.
Drop-in-Alternativen für BD3427K-E2 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
CHL8328
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
BD3427K-E2 Grenzwerte & elektrische Eigenschaften
| Product Type | Audio Special Purpose IC |
| Function Classification | Audio Channel |
| Manufacturer | ROHM Semiconductor |
| Gehäuse | 44LQFP |
| Package Type | LQFP |
| Montageart | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Quantity Per Package | 1000 |
| RoHS-Status | ROHS3 Compliant |
| Representative Unit Price | $2.9084 per unit |
| Reported Inventory Quantity | 4359 pcs |
| Additional Reported Inventory | 32800 units |
| Supply and Demand Status | Balance |
| Kategorie | Integrated Circuits (ICs) |
BD3427K-E2 1000 Pinbelegungsleitfaden
Pinbelegung für BD3427K-E2 (1000-Gehäuse). Dieses analoge Bauteil verfügt über Eingangs-, Ausgangs- und Versorgungspins. Offset-Null-, Kompensations- und Enable-Pin-Konfigurationen entnehmen Sie dem Herstellerdatenblatt. Ideal für Signalaufbereitung und Verstärkerschaltungen.
Keine detaillierten Pinbelegungsdaten verfügbar für BD3427K-E2.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
BD3427K-E2 ist geeignet für 6 Anwendungs: Legacy Audio Channel Maintenance, Professional Audio Equipment Repair, Audio Interface Retrofit, Broadcast Audio Equipment, Consumer Audio Upgrade, Industrial Control Audio Annunciator.
Legacy Audio Channel Maintenance
The BD3427K-E2 is relevant to maintenance of an existing ROHM audio-channel circuit because distributor data identifies it as an Audio Special Purpose and Audio Channel IC in a 44-LQFP package. Its obsolete designation means it is most appropriate for restoring equipment when the original device is unavailable through normal supported channels. Before ordering, engineers should download the datasheet and verify the complete pin map, supply requirements, and thermal constraints against the existing board. The confirmed 44-LQFP format and tape-and-reel packaging support structured assembly planning, although no verified reel price break is supplied.
Empfohlen
Professional Audio Equipment Repair
For repair and refurbishment of professional audio equipment, BD3427K-E2 can serve as a restoration candidate when the original board uses that exact 44-LQFP device. The supplied listings report both 4,359 and 32,800 units, but the figures may represent separate seller inventories, so current availability must be confirmed. Before installation, compare the device markings and package dimensions with the failed component, then verify supply voltage and signal-path connections using the datasheet. The representative price is $2.9084 per unit as of 2026-10-29.
Empfohlen
Audio Interface Retrofit
BD3427K-E2 may be relevant when retrofitting a legacy audio interface whose schematic calls for this exact 44LQFP part. Because the product is categorized as an audio special-purpose IC, it belongs naturally in channel-oriented signal paths, but the available excerpts do not expose input or output architecture. A responsible retrofit therefore preserves the original footprint and pin connections rather than selecting a similarly categorized device. Procurement should inspect the source listing for markings, date codes, and traceability because multiple distributors describe inventory under different manufacturer histories.
Empfohlen
Broadcast Audio Equipment
Obsolete-characteristic broadcast equipment can require a legacy audio IC when long-term support is unavailable and only exact board-level replacement is practical. BD3427K-E2 is documented as an Audio Channel device with a 44-LQFP package, allowing engineers to assess it for existing production and service inventories. Its use should remain restricted to previously qualified hardware unless the manufacturer datasheet confirms operation under the target voltage, temperature, and signal-integrity requirements. Distributor quotations and inventory should be reconfirmed before committing a production quantity.
Empfohlen
Consumer Audio Upgrade
BD3427K-E2 is generally less suitable for a new consumer-audio upgrade because it is reported as obsolete and lacks a verified modern feature set in the supplied data. It may still be relevant to a redesign based on an existing board where preserving the 44-LQFP land pattern minimizes mechanical and certification work. Engineers should compare measured channel performance, noise, distortion, output configuration, and power consumption before retaining the legacy device; these parameters are not available in the supplied excerpts and must not be inferred from the generic audio-amplifier label.
Empfohlen
Industrial Control Audio Annunciator
A legacy industrial control system with an existing 44-LQFP audio-channel device can use BD3427K-E2 as a maintenance alternative where system qualification depends on retaining the original circuit. The verified category supports audio-channel use, while the 44-LQFP package supports board-level review. Industrial adoption still requires confirmation of operating-temperature limits, supply tolerance, output drive, ESD behavior, and long-term availability. Because the component is obsolete, the engineering decision should include a second-source or redesign plan rather than depending on a single distributor inventory.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für BD3427K-E2 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Wichtigste Unterscheidungsmerkmale
- Legacy audio-channel classification (vs. CHL8328)
- Documented 44LQFP package format (vs. CHL8328)
- Verified distributor availability references (vs. CHL8328)
- Obsolete-production sourcing visibility (vs. CHL8328)
Designhinweise
Do not treat an audio-special-purpose category listing as proof that another IC is interchangeable. The supplied records do not expose BD3427K-E2 pin assignments, supply voltage, channel count, control interface, or output architecture. Before substitution, compare every numbered pin, power domain, ground connection, signal direction, and exposed-pad requirement against the authoritative manufacturer datasheet.
The confirmed 44LQFP package is land-pattern compatible only with a verified 44-pin footprint. Check body size, lead pitch, lead span, pin numbering direction, exposed-pad dimensions, and solder-mask details from the datasheet before placing or reworking the device. The current package-diagram library lacks a 44-LQFP entry, so the default visual is used and should not be used as PCB artwork.
Obtain the supply-voltage range and output-drive limits before applying power. Legacy audio ICs may contain analog sections, digital control logic, and multiple supply domains that are not visible in distributor snippets. Use current-limited laboratory power, confirm the board's ground arrangement, and monitor temperature during initial bring-up. The supplied data contains no SOA, thermal resistance, or dissipation figures.
Inventory figures from different listings are not guaranteed to be the same pool of parts, and the component is described as obsolete. Secure a written quotation, lot traceability, date-code information, and counterfeit-avoidance documentation. For production, maintain a second source or redesign path even when a distributor reports thousands of units.
Compliance-Informationen
ROHS3 compliance is reported by ics-audio.com. No separate manufacturer environmental declaration or AEC-Q100 qualification record was supplied.
