BD3433K-E2 - 6-Channel Audio Volume Control IC | ROHM
MPN： BD3433K-E2 ✓ 啟用中BD3433K-E2 概覽
An electronic volume control is an audio signal-processing IC that controls signal amplitude electronically rather than through a conventional mechanical potentiometer. Within the broader product hierarchy, it is an audio special-purpose IC and a signal-conditioning device within the semiconductor category. Its primary role is to provide programmable, soft-switching gain control while preserving low distortion and channel separation across a multichannel home or vehicle audio system.
The BD3433K-E2 integrates a six-channel input selector with independently controlled front and rear selection, input gain amplification, six-channel independently controlled electronic volume, and output gain amplification for two output lines. It also supports differential input for monophonic signals and soft-switching operation. The stated maximum input voltage is 4.25 Vrms typical, allowing the device to operate within the signal range used by the target 5.1-channel audio architecture.
The 106 dB typical crosstalk specification indicates strong isolation between the six processing channels, while the 0.001% typical THD specification identifies the device as suitable for precision multichannel audio signal paths. Low output and residual output noise values are important where channel-level noise can affect quiet passages. Independent front and rear control also supports systems requiring separate adjustment of main and surround-speaker channels rather than a single linked volume control.
Typical uses include 5.1-channel car-theater systems, automotive head units, home-theater preamplifiers, surround-sound processors, and multichannel audio switching networks. The positive VCC and negative VEE supplies support a bipolar signal environment, while the six independent volume paths map directly to front-left, front-right, center, surround-left, surround-right, and subwoofer channel organization.
Designers should preserve the negative and positive supply rails required by the device and verify that the external source and load networks remain within the documented signal limits. The QFP package also requires careful thermal and layout planning because audio and automotive equipment may operate in elevated ambient temperatures. Exact pin names, decoupling requirements, and application-circuit values require confirmation against the manufacturer datasheet.
This page consolidates the verified distributor description, datasheet-hosted electrical specifications, availability information, and application-focused engineering guidance. It also distinguishes documented performance from unverified substitution claims, providing a more useful basis for component selection, PCB planning, and sourcing BD3433K-E2.
直接替換替代品，適用於 BD3433K-E2 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品BD3433K-E2 最大額定值與電氣特性
| Product Type | 6-channel electronic volume control IC |
| Target Audio Configuration | 5.1-channel car theater |
| VCC Power Supply Voltage Range | 7.0 V to 9.5 V |
| VEE Power Supply Voltage Range | -9.5 V to -7.0 V |
| Total Harmonic Distortion | 0.001% typical |
| Maximum Input Voltage | 4.25 Vrms typical |
| Crosstalk Between Channels | 106 dB typical |
| Output Noise Voltage | 2.5 uVrms typical |
| Residual Output Noise Voltage | 2 uVrms typical |
| Number of Input Channels | 6 channels |
| Number of Volume-Controlled Channels | 6 channels |
| Input Selection | Front and rear independently controlled |
| Input Gain | Front and rear independently controlled |
| Output Lines | 2 lines |
| Differential Input Support | Yes, for monophonic signals |
| Volume Control Switching | Soft switching |
| 封裝 | 44-QFP, 10 x 10 mm |
| 安裝類型 | Surface mount |
BD3433K-E2 44-qfp, 10 x 10 mm 腳位配置指南
BD3433K-E2（44-qfp, 10 x 10 mm 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： BD3433K-E2.
請參閱 資料表 以查看完整腳位配置。
典型應用
BD3433K-E2 適用於 6 應用s: 5.1-Channel Car Theater, Automotive Head Unit, Home-Theater Preamplifier, Surround-Sound Processor, Multichannel Audio Switching Network, Powered Speaker Preamp Board.
5.1-Channel Car Theater
The BD3433K-E2 is specifically identified for 5.1-channel car-theater systems, making its six-channel architecture a direct fit for front-left, front-right, center, surround, and subwoofer signal paths. Its 0.001% typical total harmonic distortion and 106 dB typical crosstalk support precise channel separation, while 2.5 uVrms typical output noise is useful during quiet passages. The IC controls six channels with independent front and rear selection and gain functions, with soft switching for volume changes. Its 7.0 V to 9.5 V VCC and -9.5 V to -7.0 V VEE rails must be matched to the vehicle head-unit power architecture.
推薦
Automotive Head Unit
BD3433K-E2 fits the signal-management portion of a automotive head unit where multiple sources and six speaker channels must be selected and attenuated before power amplification. The independently controlled front and rear input selectors allow different source or zone behavior without duplicating the entire gain-control stage. With 106 dB typical interchannel crosstalk and 0.001% typical THD, it helps preserve source fidelity during electronic level control. Integration still requires careful validation of the positive and negative supply rails, source signal range, and thermal conditions inside the vehicle cabin.
推薦
Home-Theater Preamplifier
BD3433K-E2 can serve as the electronic volume and selection stage of a home-theater preamplifier when its dual-rail architecture matches the system design. Six controlled channels align naturally with a conventional 5.1-channel layout, while the two output lines can feed a downstream amplifier stage. The specified 2 uVrms residual output noise and 0.001% typical THD are valuable in a preamplifier where source-level control occurs before substantial power amplification. The 44-QFP 10 x 10 mm footprint also supports compact boards, although exposed-pad and thermal details must be confirmed from the manufacturer package drawing.
推薦
Surround-Sound Processor
The BD3433K-E2 is appropriate for a surround-sound processor that requires separate control of multiple analog channels rather than a shared attenuator. Its independently controlled front and rear input selection can organize program sources by listening zone, and its six soft-switching volume channels suit a 5.1-channel routing matrix. The 106 dB typical crosstalk supports the isolation expected between zone outputs, while the 4.25 Vrms typical maximum input voltage defines the signal range designers must observe. Its six-channel control function should be validated against the processor's source matrix, attenuation law, and downstream amplifier inputs.
推薦
Multichannel Audio Switching Network
BD3433K-E2 can be used in a professional or consumer multichannel switching network because it combines input selection, gain control, electronic volume, and output amplification in one IC. The separate front and rear controls allow independent routing behavior, while the six-channel volume section eliminates the need for six mechanical potentiometers. Its 2.5 uVrms typical output noise is beneficial for preserving low-level material, and soft switching can reduce audible disturbances during level transitions. System integrators must still verify the logic-control requirements, channel maps, load impedance, and bypass behavior against the complete manufacturer datasheet.
推薦
Powered Speaker Preamp Board
BD3433K-E2 is suitable for a powered-speaker preamp board that centralizes six-channel attenuation before a set of power amplifiers. Placing electronic volume control upstream of the amplifiers reduces the need for bulky mechanical controls and permits software-driven level adjustment. Its 0.001% typical THD minimizes added distortion at the preamp stage, while 106 dB typical crosstalk protects separation between independent speaker channels. The dual supply rails and 44-QFP package require deliberate layout planning, including short signal paths and careful treatment of the negative VEE domain.
推薦
推薦產品摘要
工程參考資料，適用於 BD3433K-E2 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 44-QFP, 10 x 10 mm |
| Brand | ROHM Semiconductor |
| Product Type | 6-channel electronic volume control IC |
| VCC Power Supply Voltage Range | 7.0 V to 9.5 V |
| VEE Power Supply Voltage Range | -9.5 V to -7.0 V |
| Total Harmonic Distortion | 0.001% typical |
| Crosstalk Between Channels | 106 dB typical |
| Output Noise Voltage | 2.5 uVrms typical |
| Residual Output Noise Voltage | 2 uVrms typical |
| Maximum Input Voltage | 4.25 Vrms typical |
| Volume-Controlled Channels | 6 channels |
| Verified Unit Price | $18.9519 as of 2026-10-29 |
主要差異化特點
- Purpose-built six-channel electronic volume architecture (對比Generic six-channel audio volume IC)
- Documented precision for 5.1-channel audio paths (對比Unspecified generic audio attenuator)
- Independent front and rear signal control (對比Single-linked multichannel attenuator)
設計說明
Provide separate, well-decoupled VCC and VEE rails in the range of 7.0 V to 9.5 V and -9.5 V to -7.0 V, respectively. Because the supplied evidence does not include supply-current limits or decoupling values, use the manufacturer datasheet's recommended capacitors, layout, and sequencing requirements. Keep the positive and negative supply return paths controlled so switching and audio signals do not share noisy current loops.
Route the six audio channels as short, symmetric paths from the input selector and gain stages to their outputs, with a continuous ground reference beneath the signal path. The 44-QFP package requires inspection of its exposed-pad or thermal details in the official package drawing. Place input, output, and bypass components according to the datasheet reference layout rather than estimating placement solely from the 10 x 10 mm body size.
Do not assume that BD3433K is automatically a pin-compatible substitute for BD3433K-E2. The verified records use both names, but they do not identify the suffix differences. Likewise, a generic six-channel audio IC is not a drop-in replacement unless all 44 pin assignments, dual-rail requirements, control logic, attenuation behavior, and signal-performance limits are verified against the original device.
Preserve the documented maximum input signal condition of 4.25 Vrms typical and confirm the actual source amplitude, load impedance, and downstream amplifier input range. Maintain channel symmetry so attenuation and phase behavior remain consistent across the six outputs. Use the stated 106 dB typical crosstalk and 2.5 uVrms typical output noise as verification targets rather than assuming equal performance will be retained after board-level routing and connector changes.
合規資訊
The supplied distributor and datasheet-search evidence identifies a car-theater application but does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals compliance for BD3433K-E2. Current manufacturer declarations should be obtained before production release.
