BD3843FS-E2 - 6-Channel Stereo Input Selector | ROHM
부품 번호: BD3843FS-E2 ✓ 활성BD3843FS-E2 개요
An audio function-switch IC is a specialized analog interface device that routes multiple audio sources within an audio system while preserving channel isolation and signal integrity. In the product hierarchy, the BD3843FS-E2 belongs to the broader family of analog audio processors, function switches, and interface ICs. Its internal routing architecture allows one input group to be selected for recording while another group feeds the line output, making it useful in multi-source entertainment equipment that must switch audio paths without continuous external relay noise.
Key features include independent control of two output systems, support for simultaneous operation with six-channel and seven-channel volume LSIs, and the ability to build a 14-channel input arrangement by combining BD3843FS and BD3841FS devices. The manufacturer also highlights the original pattern layout for excellent cross-talk characteristics between channels. A built-in buffer amplifier reduces the need for additional output buffering in suitable line-level designs, while the serial interface simplifies connection to a system controller.
The BD3843FS-E2 supports 2-room, 2-source entertainment and recording systems. It can be paired with the BD3813KS and BD3815KS six-channel volume LSIs, or with the BD3816K1 and BD3817KS seven-channel volume LSIs, through the shared serial control bus. This arrangement supports coordinated input selection and volume control in home-theater equipment, multi-room audio systems, car audio systems, and other stereo products with several local sources.
Because the device performs analog routing and buffering rather than high-power amplification, it belongs near the line-level signal path and requires suitable source impedance, trace routing, grounding, and decoupling. The 3.3 V or 5 V serial-control compatibility permits integration with both legacy 5 V control logic and lower-voltage systems. Confirm the complete electrical limits and pin assignments in the manufacturer datasheet before finalizing a board design.
This product page combines the manufacturer’s functional description with practical application guidance, interface relationships, sourcing routes, and a structured view of the BD3843FS-E2’s role in multi-source stereo equipment. It emphasizes design usage rather than repeating only catalog identifiers, helping engineers identify whether the selector architecture matches their channel-count, control-bus, recording-output, and line-output requirements.
드롭인 대체품: BD3843FS-E2 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청BD3843FS-E2 사양
| Product Type | 6-channel stereo input selector and audio function-switch IC |
| Input Configuration | 2 groups of 6 stereo input channels |
| Recording Output | 2 channels |
| Line Output | 1 channel |
| Independently Controlled Output Systems | 2 systems |
| Control Interface | 2-wire serial control bus |
| Serial Control Voltage | 3.3 V or 5 V |
| Built-in Feature | Buffer amplifier |
| Cross-talk Characteristics | Excellent, achieved by the manufacturer's original pattern layout |
| Compatible Six-Channel Volume LSI | BD3813KS or BD3815KS |
| Compatible Seven-Channel Volume LSI | BD3816K1 or BD3817KS |
| Combined Two-Device Input Capacity | 14 channels using BD3843FS and BD3841FS |
| 패키지 | 24-pin SSOP-A24 |
| 실장 유형 | Surface mount |
BD3843FS-E2 24-pin ssop-a24 핀 구성 가이드
BD3843FS-E2(24-pin ssop-a24 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: BD3843FS-E2.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
BD3843FS-E2 적합 용도: 6 애플리케이션s: Two-Room Home Theater System, Multi-Source Stereo Receiver, Multi-Room Audio Controller, Source Recording and Playback System, Fourteen-Channel Input Expansion, Automotive Audio Source Selector.
Two-Room Home Theater System
The BD3843FS-E2 fits two-room, two-source entertainment systems because it can manage two groups of 6 stereo input channels and independently direct them to recording and line-output functions. Its two-wire serial control bus lets the central controller share addressing and commands with compatible ROHM volume LSIs such as BD3813KS or BD3815KS. This architecture reduces the number of separate analog switching networks while helping maintain consistent channel isolation between rooms.
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Multi-Source Stereo Receiver
In a stereo receiver with numerous source inputs, the BD3843FS-E2 provides a dedicated function-switch stage for two 6-channel input groups. One path can support the receiver's recording function while the other feeds the line output under separate control. The built-in buffer amplifier is useful where source impedance and loading requirements permit, and the manufacturer highlights excellent cross-talk characteristics created by its original pattern layout.
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Multi-Room Audio Controller
A multi-room controller can use the two independently controlled output systems in the BD3843FS-E2 to distribute selected line-level stereo sources without duplicating relay matrices. The two-wire serial interface permits simultaneous control with the BD3816K1 or BD3817KS seven-channel volume LSIs, simplifying command handling in larger installations. The device is best positioned before power amplifiers because its function is source selection and buffering rather than speaker-level amplification.
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Source Recording and Playback System
The BD3843FS-E2 supports equipment that must record one source while simultaneously playing another. Its two 6-channel input groups feed independently controlled functions, including a 2-channel recording output and a 1-channel line output. This allows a system controller to change source routing without mechanically switching the entire analog path, while the built-in buffer helps maintain usable line-level signal integrity between source selection and downstream circuitry.
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Fourteen-Channel Input Expansion
Combining BD3843FS and BD3841FS allows a system to expand to 14 input channels, according to the ROHM datasheet. The BD3843FS contributes two 6-channel input groups, while the related BD3841FS provides the complementary 9-channel arrangement and 3-channel recording function. Both devices participate in serial-bus control, so the expansion can be managed from one system controller without treating the two ICs as interchangeable.
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Automotive Audio Source Selector
The BD3843FS-E2 can serve as a line-level source-selection element in automotive entertainment designs that require multiple stereo inputs and coordinated recording or line-output routing. Its serial control interface supports 3.3 V and 5 V control systems, and its surface-mount SSOP-A24 package supports compact board layouts. Automotive production use requires separate qualification review, including environmental, reliability, and supply-chain requirements not established by the standard product listing.
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추천 제품 요약
엔지니어링 참조 데이터: BD3843FS-E2 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 |
|---|---|
| Package | 24-pin SSOP-A24 |
| Brand | ROHM Semiconductor |
| Product Type | 6-channel stereo input selector and audio function-switch IC |
| Input Configuration | 2 groups of 6 stereo input channels |
| Recording Output | 2 channels |
| Line Output | 1 channel |
| Control Interface | 2-wire serial control bus |
| Serial Control Voltage | 3.3 V or 5 V |
| Built-in Buffer Amplifier | Yes |
주요 차별점
- Two independently controlled output functions (vs BD3841FS)
- Shared-bus expansion with seven-channel volume LSIs (vs BD3841FS)
- Integrated analog routing and buffering (vs Basic relay-based input selector)
설계 노트
Route the short, low-level analog paths associated with each input group with minimal trace length and maintain symmetry between stereo channels to limit timing and gain imbalance. Keep the serial-control traces away from sensitive audio inputs to reduce coupling from control transitions. The manufacturer identifies the original pattern layout as important to cross-talk performance, so the device's pin placement should be preserved rather than rearranged solely for cosmetic routing convenience.
Do not treat BD3841FS as a pin-to-pin substitute for BD3843FS-E2. The BD3841FS supports a 9-channel input arrangement and a 3-channel recording output, whereas BD3843FS uses two 6-channel input groups, a 2-channel recording output, and a 1-channel line output. Their shared manufacturer family and serial-control relationship make them complementary in multi-chip designs, not automatic replacements. Verify every net and control command before substituting either device.
Use the ROHM application circuit as the authority for supply bypass capacitance and grounding. Place required bypass components adjacent to the associated supply pins, retain a low-impedance return path, and separate noisy digital or switching-current returns from the analog reference network. Confirm the permitted supply range, absolute maximum ratings, control-logic levels, and capacitor tolerances from the manufacturer datasheet before power-up testing.
The built-in buffer amplifier does not remove all source-loading or routing constraints. Confirm each source impedance, cable length, termination arrangement, and downstream load against the datasheet's recommended operating conditions. If switching occurs between distant sources, isolate high-impedance or long cables near their source and test for pop, click, and crosstalk using the final analog layout rather than a breakout board.
규정 준수 정보
The available product information does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not applicable because the standard BD3843FS-E2 listing is not identified as an automotive-qualified variant.
