BD37514FS-E2 4-Channel I2C Audio Processor | ROHM
部品番号: BD37514FS-E2 ✗ 生産終了BD37514FS-E2 概要
An audio tone processor is a type of analog signal-conditioning IC. Within the broader hierarchy of integrated circuits, it belongs to the audio processor and interface IC category, where it sits between source-selection circuitry and downstream amplifiers or loudspeakers. Its primary role is to combine input routing, level control, tone adjustment, and mute functions while limiting audible clicks and pops caused by abrupt switched-capacitor transitions.
Key features include one differential input selector, three single-ended input selectors, and built-in ground-isolation amplifier inputs for external stereo signals. The advanced switch circuit applies controlled transitions to volume and tone functions, reducing switching noise at every adjustment step. The two-band equalizer provides bass and treble adjustment, while the integrated input-gain and mute controls support compact portable-audio signal chains.
The BD37514FS-E2 uses a 7 V to 9.5 V supply architecture typical of analog audio equipment. Its 0.4 MHz operating capability is suitable for processing audio signals within the human-audible range, while the I2C interface allows a host controller to adjust tone, volume, fader, mute, and input-selection settings. The 20-pin SSOP-A package provides a surface-mount footprint for consumer audio boards.
Typical uses include portable-stereo systems, compact radios, mini-audio systems, car-audio interface boards, and consumer electronics with several external audio inputs. The ground-isolation inputs are useful when the source and processor do not share an ideal common ground, while the selector architecture supports switching among stereo and single-ended sources.
Designers should follow the manufacturer pin-description and typical-application circuits when assigning control pins and external components. Power and signal-ground paths should be kept compact, and I2C pull-up placement must be checked against the bus topology. Because ROHM marks the family as not recommended for new designs, it is best suited to maintaining established equipment rather than starting an unrelated new platform.
This page consolidates the manufacturer feature set, package and interface details, sourcing guidance, application fit, and design cautions into an engineering-focused reference. It also distinguishes confirmed drop-in replacements from devices that merely perform a similar audio-processing function.
ドロップイン代替品: BD37514FS-E2 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストBD37514FS-E2 最大定格＆電気的特性
| Product Type | Four-channel audio tone processor |
| Equalizer | Built-in 2-band equalizer |
| Supply Voltage Range | 7 V to 9.5 V |
| Control Interface | I2C |
| Operating Frequency | Up to 0.4 MHz |
| Input Selector Configuration | 1 differential input selector and 3 single-ended input selectors |
| Switching Noise Reduction | Advanced switch circuit for input gain, mute, main volume, fader volume, bass, treble, and loudness |
| Ground Isolation | Built-in ground-isolation amplifier inputs |
| Input Gain Control | Built-in switching-noise reduction |
| Mute Function | Yes |
| Volume Functions | Main volume and fader volume |
| Tone Functions | Bass and treble |
| Loudness Function | Yes |
| パッケージ | 20-pin SSOP-A |
| 実装タイプ | Surface mount |
| Terminal Count | 20 |
| Temperature Grade | Industrial |
BD37514FS-E2 20-pin ssop-a ピン配置ガイド
BD37514FS-E2 (20-pin ssop-a パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: BD37514FS-E2.
詳細は データシート をご参照ください。
主な用途
BD37514FS-E2 の用途: 6 件s: Portable Stereo Audio, Compact Radio and Mini-Audio System, Multi-Source Home Audio Control, Automotive Audio Interface, Consumer Audio Interface Card, Legacy Audio Amplifier Control Stage.
Portable Stereo Audio
The BD37514FS-E2 fits portable-stereo boards that need multiple source inputs, low-noise volume adjustment, and tone control without several separate analog switch ICs. Its one differential and three single-ended input selectors can accommodate a stereo source and additional single-ended sources, while the 7 V to 9.5 V supply range matches compatible analog audio rails. The built-in gain and mute switching arrangement helps reduce audible clicks during level changes. A host processor can use I2C to coordinate bass, treble, loudness, main volume, and fader volume, reducing control wiring and supporting software presets. The 20-pin SSOP-A package supports compact surface-mount construction, although the product's not-for-new-design status makes it most appropriate for maintaining an established portable-audio platform.
おすすめ
Compact Radio and Mini-Audio System
The BD37514FS-E2 is appropriate for compact radio and mini-audio products that combine several analog sources with user-adjustable tone and level. The four-channel processor supports input gain, mute, main volume, fader volume, bass, treble, and loudness in one IC, reducing the number of separate control blocks. Its 0.4 MHz operating capability covers audio-band processing, while I2C allows a system controller to implement presets or front-panel synchronization. The built-in ground-isolation amplifier inputs can simplify connections to external stereo sources whose ground reference is imperfect. For a new platform, engineers should verify the ROHM control-register implementation and lifecycle roadmap before committing; for established products, the part supports economical feature integration while retaining analog volume control.
おすすめ
Multi-Source Home Audio Control
The BD37514FS-E2 can serve as the analog tone-control center in a home-audio product offering several external sources. One differential selector and three single-ended selectors provide flexible routing for stereo and auxiliary inputs, while the ground-isolation inputs help accept external equipment without requiring a perfectly matched analog ground. Its switching-noise reduction across gain, mute, volume, fader, bass, treble, and loudness is particularly useful when users operate controls frequently. I2C control permits a front-panel microcontroller to synchronize settings and implement source-specific presets. Because the IC is an analog processor rather than a full DAC or codec, it should be placed upstream of a codec or power amplifier within the signal chain. Validate input levels against the manufacturer's application circuit before layout.
おすすめ
Automotive Audio Interface
The BD37514FS-E2 may be used in legacy automotive-audio interface boards that require analog tone and volume processing from a 7 V to 9.5 V supply. The industrial temperature-grade marking, multiple input selectors, and switching-noise-controlled gain make it useful for service and board-revision work in established vehicle audio systems. Its integrated mute, bass, treble, loudness, main-volume, and fader functions allow one analog IC to replace several discrete control stages. I2C control is useful when the original vehicle head unit or an updated controller manages the audio menu. However, automotive production use requires separate qualification and system-level validation; the product's not-for-new-design status means it should not be introduced into a new vehicle platform without explicit manufacturer and quality approval.
おすすめ
Consumer Audio Interface Card
The BD37514FS-E2 is suitable for an add-on consumer-audio interface that combines external stereo and single-ended sources with adjustable tone. Its four-channel processor architecture and integrated ground-isolation inputs simplify analog routing in equipment where a common ground is unavailable or noisy. The advanced switch circuit reduces the chance of audible clicks when users change input gain, mute state, fader position, or equalizer settings. An I2C host can apply presets for different source types and expose a consistent user interface. The 7 V to 9.5 V operating range requires a compatible analog supply, and the 20-pin SSOP-A footprint requires careful decoupling and grounding. This is a maintenance-oriented building block rather than a preferred choice for a newly conceived audio platform, so confirm continued sourcing before starting production.
おすすめ
Legacy Audio Amplifier Control Stage
The BD37514FS-E2 can serve as the programmable control stage preceding a power amplifier in legacy stereo equipment. Its main-volume, fader-volume, mute, bass, treble, and loudness functions allow a microcontroller to replace multiple analog potentiometer networks, while switching-noise reduction helps keep control changes from producing clicks. The ground-isolation inputs allow the processor to accept signals from external line-level sources more reliably, and the differential selector supports a balanced input arrangement when the source supports it. The part is not itself a power amplifier, so output drive and channel-balance requirements must be checked against the manufacturer characteristics. Use the ROHM application circuit to select external resistors and capacitors, and confirm that the 7 V to 9.5 V supply remains within specification during startup and shutdown.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: BD37514FS-E2 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Package | 20-pin SSOP-A |
| Brand | ROHM Semiconductor |
| Product Type | Four-channel audio tone processor |
| Supply Voltage Range | 7 V to 9.5 V |
| Control Interface | I2C |
| Operating Frequency | Up to 0.4 MHz |
| Equalizer | Built-in 2-band equalizer |
| Input Selectors | 1 differential and 3 single-ended |
| Ground Isolation | Built-in ground-isolation amplifier inputs |
| Design Status | Not recommended for new designs |
設計ノート
Route the analog audio inputs and their ground-isolation circuitry away from digital clock and I2C traces. Place the input-network and bypass components close to their associated pins, following the pin-description table and typical application circuit in the manufacturer datasheet. Keep the SSOP-A footprint on a controlled-impedance PCB when the board carries long external-audio connections, and provide a solid ground plane without breaking return paths beneath the device.
Do not treat a similarly featured tone-control IC as a drop-in replacement without checking every pin, supply rail, control level, register address, and external component. The BD37514FS-E2 integrates one differential selector, three single-ended selectors, ground-isolation inputs, switching-noise reduction, and I2C-controlled tone and volume functions. Its 7 V to 9.5 V supply requirement and 20-pin SSOP-A footprint must both be satisfied before a board-level substitution is considered.
Treat the analog signal path, control interface, and supply return as separate layout concerns even though the device is digitally controlled. Keep I2C routing away from sensitive audio inputs, use a continuous reference plane, and place any required pull-up resistors where they will not add long stubs to the bus. Check the final schematic against the manufacturer typical-application circuit for input selectors, equalizer networks, and grounding before releasing the PCB.
コンプライアンス情報
ROHM states that the BD37514FS family is not recommended for new designs. Specific environmental-compliance declarations are not shown in the available product information.
