Circuitos Integrados

BD3485FS-E2

BD3485FS-E2 - 4-Channel Tone Control Audio IC | ROHM

The ROHM Semiconductor BD3485FS-E2 is a four-channel tone-control audio sound processor built with BiCMOS technology and housed in an SSOP-32 package. Its four-channel architecture allows one IC to process multiple audio paths, while its dedicated tone-control function supports bass and treble adjustment in compact audio systems. An audio sound processor is an integrated circuit that manages selected functions within an audio signal chain. The typical signal path includes an audio source, a tone-control or sound-processing stage, an amplifier, and a speaker or headphones. By combining four processing channels in one package, the BD3485FS-E2 can reduce component count and simplify board routing compared with four separate single-channel controllers. The key characteristics established for this device are its four-channel configuration, tone-control function, BiCMOS construction, and SSOP-32 package. These features make it relevant to multi-zone audio equipment, compact stereo products, portable consumer electronics, and embedded sound systems. The 32-pin surface-mount package also supports automated assembly and provides a defined footprint for compact circuit boards. BiCMOS construction combines bipolar and CMOS transistor technologies within the same integrated circuit. In audio-processing equipment, this approach can support a blend of analog signal handling and digital control functions. Because the BD3485FS-E2 is identified as a dedicated audio-channel IC rather than a general-purpose amplifier, its selection should be based on matching the required channel count, control functions, package, and system-level audio architecture. Typical applications include compact stereo systems, multimedia speaker designs, portable audio equipment, and multi-channel consumer products. The four channels are especially useful when several independently processed audio zones share one circuit board. Designers should also verify the complete electrical interface, recommended external components, control method, and signal levels against the manufacturer datasheet before finalizing a new design. Layout is a central implementation consideration for a four-channel sound processor. Keep input and output routing short, maintain a stable analog ground path, and place required bypass or support components close to their associated pins. Correct decoupling, controlled trace geometry, and clean separation from switching circuitry help preserve audio quality and reduce the chance of unintended noise coupling. This product page combines the confirmed four-channel, tone-control, BiCMOS, and SSOP-32 characteristics with practical selection guidance, application context, PCB implementation notes, and verified source links. It also distinguishes the device from unsupported replacement claims and directs engineers to the manufacturer datasheet for the complete pin, electrical, and application information.

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BD3486FS-E2

BD3486FS-E2 - 32-Pin SSOP Audio Processor | ROHM

The ROHM Semiconductor BD3486FS-E2 is a 32-pin SSOP audio sound processor classified as an audio-channel and sound-processor IC. It operates from an 8.5 V supply, is assembled in a 0.8 mm pitch surface-mount package, and is supplied in tape-and-reel packaging. The device belongs to the broader class of analog mixed-signal audio processing ICs used to condition and route audio signals inside multi-channel sound equipment. An audio sound processor is an audio special-purpose integrated circuit that provides signal-conditioning or channel-management functions beyond those of a basic operational amplifier. Within the product hierarchy, the BD3486FS-E2 can be classified as an audio-channel IC, then a sound processor, then an analog mixed-signal semiconductor, and finally an integrated circuit. This position explains why the device is suited to equipment requiring dedicated audio signal handling rather than general-purpose logic. The BD3486FS-E2 is offered in a compact 32-pin SSOP with a 0.8 mm lead pitch. Its 32-pin arrangement provides access to multiple audio-channel and control connections, making it appropriate for multi-channel audio paths. The package is designed for surface-mount assembly, allowing automated production and compact PCB layouts. Tape-and-reel packaging supports high-volume manufacturing and automated component placement. Because the device is identified by ROHM as a multifunctional gate and sound processor, its practical configuration depends on the signal sources, channel-routing requirements, gain-control strategy, and external support components used in the target circuit. Signal integrity depends on short, properly terminated audio traces, stable reference connections, and decoupling placed close to the device. Component selection and final schematic verification should follow the pin-description table and typical application circuits in the manufacturer datasheet. Typical uses include multi-channel sound processors, audio-channel routing blocks, compact consumer-audio electronics, and equipment that processes several related audio signals. The part may also appear in specialized playback, communication, and control systems where an integrated audio function reduces the number of separate analog components. Input and output signal levels, supported source impedance, and permissible loading must be checked against the manufacturer's electrical limits before layout release. A disciplined design should first map every BD3486FS-E2 pin to its required function, then define the shortest practical signal path between source, processor, and destination. Keep the audio return path continuous, maintain low-impedance supply and reference distribution, and reserve the package's unused or conditional pins according to the manufacturer recommendations. This page also organizes sourcing, comparison, and engineering guidance around the exact BD3486FS-E2 ordering designation. The key practical benefit of the BD3486FS-E2 is its combination of dedicated audio processing, a 32-pin 0.8 mm SSOP footprint, and production-oriented tape-and-reel packaging. Its compact pin count supports integrated channel management while preserving manufacturability. For an engineering selection, confirm signal-path compatibility, operating limits, pin availability, and lifecycle status against the current ROHM datasheet before committing a new design.

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BD3487FS-E2

BD3487FS-E2 Sound Processor with Equalizer | ROHM

The ROHM Semiconductor BD3487FS-E2 is a sound processor with equalizer functions designed for audio signal conditioning in electronic equipment. The device is offered in a 32-pin SSOP-A surface-mount package and is identified by distributor listings as a ROHM audio amplifier or audio interface IC. Its dedicated equalizer processing allows incoming audio signals to be shaped before amplification, reproduction, or further signal-chain processing. An audio sound processor is an application-specific integrated circuit that manages gain, tone, and other signal-conditioning functions within an audio path. Unlike a general-purpose operational amplifier, which performs linear amplification with externally configured feedback, the BD3487FS-E2 integrates processing functions intended to reduce the component count and board area required for multi-band audio systems. It belongs to the broader hierarchy of audio interface ICs, signal-processing ICs, and semiconductor amplifiers. The principal documented characteristics of the BD3487FS-E2 include its sound-processor and equalizer positioning, a 32-pin SSOP-A package, and a 0.8 mm package pitch indication reported in distributor documentation. Because the accessible manufacturer documentation covers the base BD3487FS device while ordering-code details distinguish the -E2 version, engineers should confirm electrical ratings, pin functions, and control logic against the BD3487FS datasheet and the manufacturer product information before releasing a layout. The integrated equalizer role is the key technical distinction for this device. A fixed or adjustable equalizer can correct frequency-dependent response, flatten source material, compensate for speaker or cabinet characteristics, or create preset tonal curves. When implemented in the BD3487FS-E2, this processing can reduce the number of discrete filters and surrounding passive networks normally required for those tasks, while keeping the audio routing predictable within one package. Typical application areas include home-audio receivers, compact stereo systems, personal audio equipment, powered speakers, and other products that require local tone control before a downstream amplifier stage. The device can also be evaluated in multi-zone audio equipment where several source paths need consistent sound shaping. System-level performance still depends on the surrounding analog network, external component selection, grounding, and the behavior of the downstream power amplifier. For PCB design, the 32-pin SSOP-A footprint requires careful escape routing because the fine pitch limits component access and trace spacing. Place the equalizer-related external components close to their associated pins, maintain a continuous ground reference beneath the analog section, and separate the audio input region from noisy power-conversion stages. Prototype and measure the complete signal chain, including channel separation, gain stability, frequency response, and distortion. This page consolidates the verified product identity, package information, distributor records, application guidance, and design considerations for BD3487FS-E2. It also distinguishes confirmed characteristics from electrical parameters that must be taken directly from the manufacturer datasheet, helping engineers plan sourcing and hardware development without relying on unverified substitute parts.

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BD3488FS-E2

BD3488FS-E2 Audio Sound Processor with Equalizer | ROHM

ROHM Semiconductor BD3488FS-E2 is an audio sound processor with equalizer, supplied in a 32-pin SSOP surface-mount package on tape-and-reel carriers. The component is intended for electronic audio systems in which an integrated sound-processing stage is needed between source circuitry and an audio output stage. Its exact electrical ratings, control interface, gain configuration, and signal-path behavior must be confirmed against the manufacturer datasheet before design release. An audio sound processor is a specialized analog signal-processing IC. Within an audio system hierarchy, it performs control and conditioning functions such as equalization, which adjusts the relative amplitude of selected frequency bands before signals reach an amplifier or transducer. Unlike a power amplifier, the BD3488FS-E2 is characterized as an audio amplifier or sound-processor component rather than a speaker-output driver, so its suitability depends on the required signal level and downstream circuit architecture. The BD3488FS-E2 combines an audio-specific function with a compact 32-pin SSOP package. This surface-mount format supports automated board assembly while providing a greater number of external connections than a small-outline package with only a few pins. The tape-and-reel presentation is appropriate for production feeding, pick-and-place assembly, and automated inspection. Pin assignments, exposed functions, and electrical limits should be taken directly from the package drawing in the ROHM Semiconductor datasheet. As an equalizer-based sound processor, the device belongs in signal-conditioning paths for consumer audio, compact stereo systems, accessory products, and other equipment that needs controllable tonal adjustment. The useful design question is not only whether the part provides equalization, but also how its input and output signal levels, control method, stability, and supply requirements align with the rest of the signal chain. Those details determine whether the IC is appropriate as a standalone processing stage or as one element in a larger active-speaker architecture. Typical implementation requires a stable supply, suitable input and output coupling or biasing networks, and decoupling close to the power pins. The PCB should preserve the manufacturer’s recommended grounding and trace geometry, while keeping high-gain audio paths away from switching nodes and noisy digital return currents. Grounding and decoupling choices can materially influence noise, channel-to-channel behavior, and the probability of oscillation. Before committing the BD3488FS-E2 to a new PCB, verify the complete pin list, recommended application circuit, absolute maximum ratings, and test-point requirements. Also check that the 32-pin SSOP footprint, assembly tolerances, and tape-and-reel orientation match the production line. The same-package constraint is essential: a functionally similar IC cannot be treated as a drop-in replacement unless its pin numbering and electrical interfaces have been confirmed equivalent. This page consolidates the confirmed device identity, package information, sourcing context, application guidance, and design considerations into an engineering-focused reference. It also distinguishes confirmed product characteristics from parameters that require direct verification in the manufacturer datasheet, helping designers evaluate the BD3488FS-E2 without assuming unverified electrical values or compatibility.

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BD3489FS-E2

BD3489FS-E2 - ROHM Sound Processor / Equalizer IC | 32-Pin SSOP-A

The ROHM Semiconductor BD3489FS-E2 is a silicon monolithic sound processor IC with integrated equalizer functions, packaged in a 32-pin SSOP-A surface-mount package supplied in tape-and-reel form. It is a dedicated audio signal-conditioning device: the equalizer (tone control) function shapes the amplitude of audio frequency bands, and the surrounding sound-processor logic supports volume, tone, and balance control paths typical of car audio and consumer audio subsystems. An audio equalizer is a passive or active frequency-selective circuit that applies a defined gain to each of several frequency bands. Inside a car head unit or mini system, the equalizer block sits between the source selector and the power amplifier, so the sound processor IC defines the tonal character of the output stage. Its immediate hierarchy is audio signal-processing IC -> sound processor -> equalizer/tone control -> audio subsystem -> consumer and automotive audio equipment. Key packaging and ordering features of the BD3489FS-E2 include the -E2 suffix denoting the RoHS-compliant, embossed carrier-tape-and-reel delivery form, a 32-pin SSOP-A body that suits high-density audio boards, and a single silicon monolithic construction that keeps the external BOM small. Because the equalizer and processor functions are integrated on one die, the board designer can replace discrete filter networks and switching logic with a single IC, reducing assembly cost and improving channel matching between left and right paths. The BD3489FS family is designed for bidirectional stereo processing, with separate control inputs for each channel so that gain settings, tone, and volume can be adjusted independently. Because the device is intended for audio signal paths rather than logic-level logic, its internal stages are optimized for low-noise audio bandwidth operation with a mono/stereo signal flow appropriate for potentiometer or switch control from a front-panel interface. Typical uses include car audio head units, compact stereo systems, radio and cassette-era audio decks, home mini-system amplifiers, and portable or docked audio products where an adjustable tone control is expected in the signal chain. The 32-pin SSOP-A footprint is also attractive for designs that need many control lines but must fit a small PCB. When designing around this part, confirm the exact pin assignment and typical application circuit from the ROHM datasheet before layout, because the control pins of sound processor ICs are frequently routed directly to front-panel switches and dual-gang potentiometers. Reserve filtering and decoupling close to the supply pins, and treat the equalizer band centers and Q factor as fixed by the internal topology rather than user-adjustable. This page adds engineering context beyond the manufacturer datasheet: a structured specification list with explicit data gaps, a same-footprint alternative comparison, six application scenarios with companion component recommendations, and layout and signal-integrity design notes that reduce bring-up risk on audio boards.

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BD3490FV-E2

BD3490FV-E2 - 2-Channel Audio Tone Processor | ROHM

The ROHM Semiconductor BD3490FV-E2 is a 2-channel audio sound processor with a built-in 2-band equalizer, operating from a 4.75 V to 9.5 V power supply in a 28-pin SSOP-B package. It is designed for portable stereo systems and is also identified for mini component systems, micro component systems, televisions, and radio-cassette recorders. Its low-current operating approach supports compact audio equipment where supply efficiency, external-component count, and board area are important. An audio sound processor is a functional block within the broader signal-chain hierarchy of audio amplifiers and analog audio integrated circuits. It receives stereo audio signals, applies tone or equalization functions, and passes the processed signals toward an audio power amplifier or loudspeaker drive stage. By integrating a 2-band equalizer into one IC, the BD3490FV-E2 can reduce the number of discrete passive networks and control components required for bass and treble adjustment in compact consumer-audio equipment. The device's headline features include 2-channel processing, a built-in 2-band equalizer, a 4.75 V to 9.5 V compatible supply range, and a low-current Bi-CMOS implementation. The equalizer provides a practical tone-control function within the stereo signal path, while the relatively broad supply-voltage range accommodates conventional low-voltage audio rails. The 28-SSOP-B package is a surface-mount format suited to automated PCB assembly, although its relatively long body requires more board length than a compact leadless package. ROHM describes the BD3490FV family as delivering high-fidelity audio while remaining easy to use. The Bi-CMOS process combines bipolar signal-processing characteristics with CMOS circuitry and is intended to support low-current, low-energy operation. Additional functions cited for the family include a built-in surround function, bass-boost or output-gain implementation with an external component, and behavior suited to changing the volume setting. Detailed signal-path behavior, control logic, and application-circuit values should be confirmed against the manufacturer datasheet before layout is finalized. Typical applications include portable stereo systems, mini and micro component audio systems, television audio paths, and radio-cassette recorder products. These systems benefit from local bass and treble adjustment without allocating a separate equalizer IC. The part can also sit upstream of a power amplifier, where its processed stereo channels provide a tone-controlled source signal while leaving current delivery and loudspeaker drive to the downstream amplifier stage. A key implementation consideration is the interaction among the 4.75 V minimum supply voltage, the external equalizer network, bypass capacitors, and the downstream amplifier input. Place the input, output, and bypass connections according to the manufacturer application circuit, keep analog signal traces short, and isolate the audio path from switching-node and high-current supply paths. Verify termination values, recommended capacitors, control settings, and maximum signal levels against the relevant ROHM documentation. This product page combines the verified device identity, supply range, channel count, equalizer configuration, package information, and application context with practical selection guidance. It also identifies drop-in alternatives only when the package and functional fit can be established, avoiding replacements that require pin or board-layout changes.

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BD3491FS-E2

BD3491FS-E2 Stereo Sound Processor | ROHM Semiconductor

The ROHM Semiconductor BD3491FS-E2 is a two-channel analog sound processor with built-in surround-sound functionality, six single-ended stereo input selectors, and an I2C control interface. It operates from a 4.75 V to 9.5 V supply in a 32-pin SSOP-A package. The processor also provides a two-band equalizer, bass boost, output gain, and surround-sound functions implemented with external components. An analog sound processor is an audio signal-processing IC that receives multiple stereo sources, selects the required input, adjusts level and tone, and routes the result into an audio signal chain. It belongs to the broader hierarchy of analog audio processor, audio signal processor, integrated circuit, and semiconductor. This category is useful when a product needs source selection and programmable sound shaping without using a digital signal processor for every adjustment. Six single-ended stereo input selectors allow the BD3491FS-E2 to handle several analog sources while maintaining a straightforward analog architecture. Its built-in input gain controller is intended for mobile-audio applications, where changing the gain of a selected source can simplify front-end design. The volume input terminal can also serve as a microphone input because its impedance remains constant when the volume setting changes. The two-band equalizer provides bass and treble adjustment with a gain range of plus or minus 14 dB in 2 dB steps. This allows the sound character to be tailored without adding a separate equalizer stage. Additional bass-boost, output-gain, and surround functions are realized using external components, providing flexibility between the IC and the surrounding analog network. The Bi-CMOS process supports low-current and low-energy operation while combining bipolar and CMOS circuit characteristics. Typical uses include mobile audio equipment, consumer stereo systems, portable-media products, and other analog audio products requiring multiple source inputs. The I2C interface enables controlled configuration of the device, while the 32-SSOP-A package supports conventional surface-mount assembly. When designing around the BD3491FS-E2, preserve the required input and output network around the external surround components, and verify the signal levels at each selected input before enabling the equalizer or bass-boost functions. The constant-impedance volume or microphone terminal can simplify source switching, but microphone biasing and termination still require appropriate external components. This product record combines the manufacturer feature description, distributor identification, package information, application details, and design guidance in one engineering-focused reference. It also identifies the limited set of same-footprint alternatives and highlights where a complete pin-by-pin, electrical, and lifecycle review is required before substitution.

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BD3805F-E2

BD3805F-E2 Car Audio Sound Processor | Rohm Semiconductor

The Rohm Semiconductor BD3805F-E2 is a dedicated car-audio sound processor IC identified by distributor listings under the Audio Special Purpose category. The verified product data describes it as an SCF built-in sound processor for car audio and identifies the -E2 variant as a 22-pin SOP device supplied in tape-and-reel packaging. It is intended for automotive audio systems that require a dedicated signal-processing function rather than a general-purpose audio amplifier. An audio sound processor is an application-specific integrated circuit that processes audio signals inside a vehicle infotainment or head-unit platform. Within the broader semiconductor hierarchy, it belongs to the audio special-purpose IC family, which sits alongside audio amplifiers, codecs, DSPs, and interface ICs. Its exact internal processing functions and electrical limits must be confirmed against the Rohm manufacturer datasheet before schematic capture or firmware configuration. The BD3805F-E2 is specifically associated with car-audio sound processing. The verified distributor listings place it among sound-processor and car-audio amplifier products, while an archived BD3805F datasheet describes the base device as an SCF built-in sound processor for car audio. This makes the part most relevant to designers of vehicle head units, source units, and aftermarket automotive audio control platforms. The -E2 ordering code is associated with the 22SOP tape-and-reel package in the verified distributor record. Package choice remains critical for automotive production because PCB land patterns, pin orientation, soldering profiles, and moisture-handling requirements must match the assembled board. No manufacturer pin-assignment table or complete electrical characterization was present in the supplied verification data. When evaluating this device, engineers should obtain the Rohm BD3805F datasheet and confirm supply voltage, interface topology, supported audio paths, control signals, reset requirements, clocking, and production test procedures. The verified web results provide purchasing and classification data but do not establish detailed operating ratings, so those parameters are marked as data needed rather than estimated. This page consolidates verified distributor classification, lifecycle-sourcing context, package information, comparison limitations, and engineering questions around the BD3805F-E2. Its alternative analysis is intentionally limited to parts supported by the supplied cross-reference evidence, avoiding unrelated audio amplifiers or processors that would require board redesign rather than a true drop-in substitution.

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BD3806FS-E2

BD3806FS-E2 Audio Processor | ROHM Semiconductor

The ROHM Semiconductor BD3806FS-E2 is an audio special-purpose integrated circuit associated with medium-power linear and switching applications. Verified distributor records identify the component as an audio processor and audio channel IC, while package references vary between 22SOP and SSOP-32. The BD3806FS-E2 therefore belongs to the amplifier and audio-processing portion of the broader integrated-circuit hierarchy, where dedicated audio devices condition, amplify, or route low-frequency signals. An audio special-purpose IC is an integrated circuit optimized for functions such as audio amplification, channel control, signal processing, and drive-stage management. Unlike a general-purpose operational amplifier, an audio processor can incorporate application-specific circuitry intended to simplify multi-channel or medium-power audio designs. The supplied records classify the BD3806FS-E2 specifically as an audio processor, but they do not provide a verified datasheet or internal database specifications for its voltage, current, gain, channel count, frequency response, or protection features. The verified distributor classification is the principal functional attribute available for this part. Its application context is identified as medium-power linear and switching applications, indicating that it is associated with audio power-chain design rather than general signal processing. One supplier describes the device as an audio channel, while another labels it an audio processor. The latter appears repeatedly across distributor records and is therefore used as the primary product description in this data set. Physical packaging must be confirmed before PCB design or procurement. Verified sources contain both “22SOP” and “SSOP32” descriptions for BD3806FS-E2. Because the available records conflict and do not provide a complete manufacturer pinout, no reliable pin numbering or exposed-pad arrangement can be published here. The component should be ordered only after its ordering code, package drawing, lead pitch, and terminal mapping have been checked against the current ROHM Semiconductor datasheet or a distributor-controlled CAD and data sheet. BD3806FS-E2 can be evaluated for consumer audio channels, powered speakers, compact stereo systems, and other medium-power audio products in which the circuit requires an integrated audio function rather than a generic signal-path amplifier. Its precise suitability depends on supply voltage, output topology, channel configuration, thermal dissipation, and required protection, none of which can be confirmed from the supplied web evidence. Engineers should therefore avoid making final architecture or layout decisions from the distributor category alone. The primary design caution is to verify package and electrical data before substitution or assembly. A distributor listing may combine historical LAPIS Semiconductor material with a current ROHM Semiconductor record, and inconsistent package descriptions are present in the evidence. Obtain the authoritative datasheet, confirm the exact ordering suffix, and compare every pin function before compiling a footprint or designing a replacement. Distributor availability should also be checked at order time because the provided search results do not contain a stable inventory count or quoted price table. This page consolidates the verified distributor classifications, package conflicts, sourcing links, and available cross-reference evidence for BD3806FS-E2. It deliberately distinguishes confirmed information from missing electrical data and avoids inventing voltage ratings, pin definitions, pricing, drop-in equivalents, or lifecycle claims that were not supplied by the verified sources.

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BD3808FS-E2

BD3808FS-E2 Audio Processor IC | ROHM Semiconductor

ROHM Semiconductor BD3808FS-E2 is an audio-special-purpose integrated circuit classified by DigiKey as an Audio Channel device and by other distributor listings as an audio processor. The supplied product information identifies a 22SOP package and associates the device with medium-power linear and switching applications. These verified facts place the BD3808FS-E2 in the broader category of audio processing ICs, where dedicated circuitry manages audio signal paths or associated control functions within consumer and industrial audio equipment. An audio processor is a specialized application-specific semiconductor. Unlike a general-purpose logic IC, it is designed around audio-channel requirements, including signal handling, channel control, or functions used to implement an audio system. The BD3808FS-E2 belongs to this audio-special-purpose IC hierarchy, which sits within integrated circuits and ultimately within the semiconductor component category. Its 22SOP package provides the physical interface used to connect the device on a printed circuit board. The verified distributor records distinguish the exact BD3808FS-E2 ordering code from the broader BD3808FS family listing. DigiKey identifies BD3808FS-E2 as an Audio Channel part, while marketplace records describe it as an IC audio processor in a 22SOP package. A distributor description also associates it with medium-power linear and switching applications. These classifications suggest that engineers should review the manufacturer datasheet for the exact channel architecture, electrical limits, external component requirements, and supported signal topology before releasing a production design. From a sourcing perspective, the BD3808FS-E2 is listed across DigiKey, Octopart, and multiple distributor or catalog channels. The verified search results report availability or comparison coverage, but they do not provide numeric pricing, stock quantities, operating-temperature limits, supply-voltage limits, output-current ratings, gain, distortion, frequency response, pin assignments, or package dimensions. Consequently, those electrical and mechanical parameters cannot be safely inferred from distributor category labels and must be confirmed in the manufacturer documentation. Typical design investigation for this device would focus on medium-power audio systems, signal routing, channel management, and mixed linear or switching signal-chain implementations. Whether it is suitable for a particular headphone, speaker, receiver, or auxiliary audio board depends on its documented supply range, channel count, control interface, and electrical performance. Engineers should also verify footprint compatibility, exposed or non-exposed pad details, pin multiplexing, and recommended application circuitry rather than relying only on the 22SOP package name. The main purchasing risk is incomplete verification: the supplied data does not establish lifecycle status, automotive qualification, RoHS or REACH declarations, exact package drawing, or a manufacturer-hosted datasheet URL. Samples and lot traceability should therefore be obtained before substitution. This page distinguishes verified distributor facts from unknown technical fields and avoids presenting estimated electrical ratings as if they were manufacturer specifications. This page adds engineering-focused value by mapping the verified 22SOP package and audio-processor classification to likely design checks, documenting all available source links, and identifying the exact data still required for footprint validation, schematic review, sourcing, and production release. It also explains why an apparently similar BD3808FS order code should not be assumed to be a drop-in alternative without package and pin-level verification.

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BD3809FS

BD3809FS - Audio Channel Processor | ROHM Semiconductor

ROHM Semiconductor BD3809FS is an audio-channel integrated circuit identified by distributor records as an audio processor in a 22SOP package. The available catalog information describes the device for medium-power linear and switching applications, while the primary distributor listing classifies it under Audio Special Purpose and Audio Channel. These verified identifiers establish the component family and form factor, but the supplied source excerpts do not include a complete manufacturer datasheet parameter table. An audio-channel processor is an application-specific integrated circuit used to process, control, or route audio signals within an audio subsystem. It belongs to the broader hierarchy of audio ICs, analog and mixed-signal semiconductors, and signal-processing integrated circuits. Compared with a general-purpose operational amplifier, an application-specific audio processor may incorporate multiple functions, but the exact internal blocks and signal paths of BD3809FS cannot be confirmed from the supplied excerpts. The verified package identifier is 22SOP. That package provides 22 physical lead positions, but the supplied data does not include a pinout, pin names, exposed-pad information, dimensions, or pin-to-pin replacement cross-reference. The catalogs also identify BD3809FS-E2 as an ordering designation associated with the same device family. Its electrical details, marking code, temperature range, and ordering-code differences require confirmation from the manufacturer datasheet. BD3809FS is associated with audio-channel applications and medium-power linear and switching application descriptions. These descriptions make it relevant to audio equipment, signal-conditioning circuits, and communication equipment where an audio-channel IC is required. However, verified operating voltage, input and output signal range, channel bandwidth, gain, distortion, channel count, control interface, and output-drive specifications are not included in the supplied source data and should not be inferred from the product type alone. Because the available evidence is distributor-oriented rather than a complete technical datasheet, engineers should verify pin functions, supply requirements, timing, absolute maximum ratings, decoupling recommendations, and application circuitry before committing to a design. A replacement should be selected only after confirming the exact 22SOP footprint, pin assignment, control protocol, electrical limits, and signal performance. This page consolidates the verified BD3809FS identity, package, category, distributor availability references, replacement-search evidence, and engineering-selection cautions. It separates confirmed catalog facts from unavailable technical parameters and provides a practical verification path for schematic capture, PCB layout, sourcing, and component-risk review.

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BD3809FS-E2

BD3809FS-E2 Audio Processor 22-SOP | ROHM Semiconductor

The ROHM Semiconductor BD3809FS-E2 is an audio processor integrated circuit supplied in a 22-pin SOP package. The verified distributor listing identifies the device as an audio processor, while the DigiKey listing categorizes it as an audio channel IC. The component is intended for audio signal-processing equipment where a dedicated integrated circuit is preferred over a discrete implementation of multiple analog and control functions. It is supplied in tape-and-reel packaging according to the verified product listing, with a stated inventory of 4,609 pieces at the referenced distributor as of the verification date. An audio processor IC is a specialized form of signal-processing semiconductor. In the broader hierarchy, it belongs to the integrated-circuit category and is associated with audio-channel processing, interface, and control functions. Unlike a general-purpose microcontroller or DSP, the BD3809FS-E2 is positioned specifically for audio applications. Exact input formats, output stages, control interfaces, gain settings, distortion limits, voltage requirements, and supported channel configurations are not present in the supplied verified data and should therefore be confirmed in the manufacturer datasheet before schematic capture or PCB layout. The verified catalog data provides several practical procurement and assembly facts. The BD3809FS-E2 is offered as an IC AUDIO PROCESSOR in a 22SOP package. One distributor lists its RoHS status as ROHS3 compliant, and another listing describes the component as tape-and-reel packaged. Digikey identifies the part as available from ROHM Semiconductor and provides access to datasheet, pricing, and availability information. These catalog statements make the part searchable as a dedicated audio-channel solution rather than a generic logic or memory device. The BD3809FS-E2 is relevant to audio-system design, including signal-conditioning modules, compact audio interfaces, and equipment requiring a dedicated audio processor. Because the supplied snippets do not disclose the complete electrical architecture, designers should not assume a particular microphone gain, line-level input sensitivity, speaker-drive capability, channel count, sampling format, or supply voltage. The manufacturer datasheet and pinout are the controlling references for those details. A key engineering consideration is that the 22SOP footprint requires PCB design rules appropriate to the exact lead pitch and outline shown in the manufacturer drawing. Confirm pad dimensions, pin numbering, exposed thermal features if any, soldering profile, and recommended ground layout before releasing artwork. Also verify the logic levels, power rails, decoupling requirements, and analog signal routing against the target system architecture. This page consolidates the verified catalog identity, category, package, RoHS statement, packaging format, distributor availability, and engineering-selection cautions for BD3809FS-E2. It also distinguishes verified facts from parameters that still require datasheet confirmation, helping engineers make an initial sourcing decision without mistaking category-level descriptions for full electrical specifications.

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BD3811K1

BD3811K1 - 6-Channel 5.1ch Sound Processor | ROHM

The ROHM BD3811K1 is a 6-channel 5.1ch sound processor with integrated mode selection, input selection, 6-channel volume control, gain amplification, bass, treble, and bass boost functions. The device is supplied in an 80-QFP package measuring 20 mm by 14 mm and is designed for home-theater and multichannel audio systems. A sound processor is a dedicated audio-system IC that controls routing, level, tone, and channel-mixing functions before signals reach power amplifiers and loudspeakers. The BD3811K1 belongs to the broader hierarchy of audio special-purpose ICs, audio signal processors, analog and mixed-signal semiconductors, and integrated circuits. Its 5.1ch orientation means that one front-left, front-right, center, surround-left, surround-right, and subwoofer channel can be managed from a dedicated processor. The verified manufacturer datasheet identifies the BD3811K1 and BD3818KS as 5.1ch sound processors with built-in mode and input selectors. For BD3811K1, the integrated functions include 6-channel volume, gain amplifier, bass, treble, mixing through the family architecture, and bass boost. These functions reduce the number of separate analog controls required in a home-theater receiver or powered-speaker system. The available operating-supply indication is 10 V to 14.6 V, supporting conventional internal analog rails found in multichannel audio equipment. The BD3811K1 is identified by distributors as an audio tone processor in the 80-QFP (20 x 14 mm) package. Its pinout, exact control-voltage ranges, signal-frequency limits, total harmonic distortion, noise specifications, and recommended external-component values are not included in the supplied verified dataset. Those values must be taken directly from the manufacturer datasheet before signal-path or thermal calculations are approved. Typical uses include home-theater preamplifiers, 5.1ch surround-sound receivers, powered multimedia speakers, and analog multichannel source systems. The integrated bass, treble, volume, gain, and bass-boost blocks are particularly useful where a shared system-level tone controller is preferable to discrete analog networks. The input and mode selectors can also simplify source routing, although the exact supported modes and input count require confirmation from the datasheet. When designing around the BD3811K1, treat the audio paths, control inputs, supply rails, and ground returns as an analog system rather than as generic digital logic. Keep input and output routing away from switching supplies and high-current amplifier outputs, provide local supply bypassing according to the manufacturer application circuit, and verify the PCB footprint against the 80-QFP drawing before release. This page consolidates the verified distributor listings, manufacturer-hosted PDF, package information, supply-voltage indication, pricing signal, and practical selection guidance for BD3811K1. It also distinguishes confirmed data from parameters that still require verification from the official datasheet, reducing the risk of designing from an incomplete substitute listing.

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BD3812F-E2

BD3812F-E2 - 2-Channel Audio Volume Controller | ROHM

The ROHM Semiconductor BD3812F-E2 is a 2-channel electronic audio volume controller with 1.2 uVrms residual noise, a 131 dB dynamic range under the IHF-A weighting condition, and independent channel attenuation from 0 dB to -103 dB. The device also provides MUTE operation in 1 dB steps and uses two-line serial control. It is supplied in a 14-pin SOIC package. An electronic volume controller is an audio signal processor that adjusts the level of one or more audio channels through a control interface rather than a mechanical potentiometer. In the product hierarchy, it belongs to the broader class of audio special-purpose ICs, which sit between analog signal-generation blocks and power amplifiers. The BD3812F-E2 is designed to preserve audio signal quality while providing repeatable, software-controlled attenuation for multi-channel audio systems. The BD3812F-E2 supports independent control of two channels over a 103 dB attenuation range. Its mute function changes the level in 1 dB steps, making it suitable for product designs that need fine attenuation control, channel balancing, or user-selected volume settings. When combined with any of the BD3811K1, BD3813KS, BD3814FV, or BD3815KS family members, as specified by ROHM, the common bus supports up to eight channels. The common-bus architecture can also control as many as four chips at the same time. The maximum output voltage is 4.2 Vrms under the stated conditions of VCC = 7 V, VEE = -7 V, and RL = 10 kOhm. This output capability, combined with a residual-noise specification of 1.2 uVrms, supports low-noise audio signal paths. The two-line serial control reduces the number of control connections required compared with a parallel volume-control arrangement, which can also simplify PCB routing and microcontroller interface design. Typical uses include television and monitor audio channels, home-audio systems, active speakers, audio mixers, and multi-zone entertainment equipment. The device is particularly useful where independent left and right attenuation, common-bus expansion, mute control, or precise software-defined volume adjustment is required. Because its operating supply range is specified as 5 V to 7.3 V, the surrounding circuit must provide compatible positive and negative analog rails where the application requires the stated 4.2 Vrms output capability. Designers should preserve the datasheet-specified bypass and output-load conditions when evaluating signal integrity. The 10 kOhm load used for the stated maximum-output condition is relevant to downstream amplifier planning, and any external coupling or amplifier input must not load the output beyond the supported operating conditions. Decoupling should be placed close to the supply pins, and the common-bus wiring of multiple devices should be kept short to minimize coupling between channels. This product data combines the verified ROHM feature description with distributor packaging information, practical multi-channel application guidance, and explicit data-gap markers. It distinguishes verified numeric performance from unreported specifications and does not infer a pin assignment, temperature range, or drop-in substitute that the supplied sources do not confirm.

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BD3813KS-E2

BD3813KS-E2 - 6-Channel Audio Processor | ROHM Semiconductor

The ROHM Semiconductor BD3813KS-E2 is a six-channel Bi-CMOS audio signal processor with independent master-volume control, a 129 dB dynamic range, and a 56-pin SQFP package measuring 10 mm by 10 mm. It supports a 0 dB to -95 dB attenuation range in 1 dB mute steps and can produce a maximum output of 4.2 Vrms under the specified dual-supply conditions. An audio signal processor is an integrated circuit that combines multiple functions used to condition analog audio signals. In the broader electronics hierarchy, it belongs to the signal-processing IC and audio-IC classes, where it sits between source or preamplifier stages and power amplifiers. Rather than merely amplifying signals, this device applies volume, tone, and channel-level control while preserving low residual noise and limiting audible switching transients. The six-channel architecture supports independent master-volume adjustment, making the device suitable for systems that must control several audio paths separately. Its resistance-ladder implementation is specifically intended to reduce residual noise and shock sound during switching. The Bi-CMOS process combines bipolar and CMOS characteristics and supports low-current operation. Additional features include two-wire bass and treble control, as listed for the BD3813KS-E2, and a broad 10 V to 14.6 V operating-supply range. The 129 dB dynamic-range specification applies under the manufacturer's stated tone-bypass, muted-volume, and IHF-A conditions. Maximum output voltage reaches 4.2 Vrms when the device operates from +7 V and -7 V with a 10 kohm load. These conditions are important when designing around headroom: the available output amplitude depends on supply voltage, load impedance, signal level, and the selected control settings. Typical applications include AV receivers, home-theater systems, mini-component audio systems, multichannel amplifiers, active speakers, and other 5.1-channel or 6.1-channel equipment. The device is particularly relevant where multiple amplified channels require coordinated volume control, tone adjustment, or electronic attenuation before the final power-amplifier stage. The main design consideration is supply and signal-path planning. Keep the audio input and output routing short, provide clean bypass capacitors at the supply pins, and confirm the external component values required for the intended tone-control network. Because the 56-pin square package has fine-pitch leads and an exposed thermal structure, careful soldering, handling, and PCB thermal design are required. This product overview combines the manufacturer's feature data with package information, application guidance, engineering considerations, and a conservative replacement analysis. It helps designers evaluate signal-chain fit, output headroom, control architecture, and PCB implementation before selecting the BD3813KS-E2 for a multichannel audio design.

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BD3814FV-E2

BD3814FV-E2 - 6-Channel Audio Processor | ROHM

ROHM BD3814FV-E2 is a six-channel electronic-volume audio processor designed for bass and treble tone-control functions in audio systems. It operates from a 10 V to 14.6 V supply range, supports a 2-wire control interface, and is packaged in a 40-terminal SSOP-B. ROHM identifies the BD3814FV family as a Last Time Buy product following a discontinuation announcement, so engineers should include lifecycle risk in new-design decisions. An audio processor is an analog signal-conditioning integrated circuit that controls, attenuates, or shapes audio signals between source and amplifier stages. In the broader product hierarchy, the BD3814FV-E2 belongs to audio processors, analog audio control ICs, and integrated circuits for consumer and professional audio equipment. Its electronic-volume function can provide centralized level and tone adjustment without requiring a separate potentiometer or mechanically operated control for every audio channel. The device is identified as a six-channel electronic-volume processor with bass and treble control. These functions are relevant in multi-zone audio systems where different speaker groups require independent attenuation or tonal compensation. The 40-SSOP-B package provides a relatively high pin count for an analog control IC, supporting multiple signal and control connections while remaining compatible with conventional surface-mount PCB assembly. The BD3814FV-E2 uses a 2-wire interface for tone-control functions. This interface-oriented approach is appropriate for systems where several control parameters are handled through a shared control link rather than a large number of discrete analog inputs. System integrators should confirm the exact control protocol, logic levels, timing, and supported commands against the manufacturer datasheet before finalizing firmware or host-controller communication. Typical applications include multichannel amplifier boards, active speaker crossover networks, car-audio tone controllers, home-theater preamplifiers, compact stereo systems, and commercial audio distribution equipment. In a multi-zone amplifier, the processor can be positioned in the signal path ahead of power amplifiers so bass and treble adjustments are handled consistently across the available channels. Its six-channel architecture is especially useful where several speaker zones need coordinated volume and tone control. Because the BD3814FV-E2 family has entered Last Time Buy status, engineers should review the manufacturer product page for lifecycle notices, ordering information, and any applicable change notifications. A robust design should also reserve the footprint for a qualified alternate only after its pinout, control interface, electrical limits, and acoustic behavior have been compared with the original device. This page combines the confirmed product identity, lifecycle information, package details, application context, engineering guidance, and sourcing considerations for the BD3814FV-E2. It is intended to help designers assess whether the device’s six-channel electronic-volume architecture and 2-wire tone-control interface fit a new or existing audio-control board while accounting for its discontinued-family status.

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BD3816K1

BD3816K1 - 7-Channel Audio Signal Processor | ROHM Semiconductor

The ROHM Semiconductor BD3816K1 is a 7-channel audio signal processor, also described in distributor listings as a 6.1-channel sound processor, intended for multi-channel audio systems. The device operates from a 10 V to 14.6 V supply according to the Mouser listing and is packaged in an 80-pin QFP measuring approximately 20 mm by 14 mm. Its primary function is to process and route multiple audio channels while providing bass and treble controls, making it suitable for home-theater receivers, amplified speakers, car audio systems, and other multi-zone entertainment equipment. The BD3816K1 belongs to the broader category of audio special-purpose integrated circuits. An audio signal processor is a functional block within the signal-chain hierarchy: source audio enters the processor, control logic and internal circuitry condition the signals, and the processed outputs are sent to amplifiers, speakers, or additional audio equipment. Compared with a simple passive tone-control network, an integrated processor can centralize channel selection, volume, bass, treble, and other system functions while reducing external discrete-component requirements. Verified distributor information identifies the BD3816K1 as a 7-channel audio audio-signal processor and identifies a 2-wire bass/treble control interface. The GlobalSpec result lists a serial interface type, an operating current of 40 mA, and an operating temperature range from -20 C to +75 C. The same source also lists supply-voltage entries of 5 V and a 5 V to 7.3 V range, while Mouser identifies a 10 V to 14.6 V operating range. Because these published entries are not mutually consistent, engineers should confirm the exact electrical limits and recommended operating conditions against the applicable ROHM datasheet before committing a design. The 80-QFP package provides the physical pin count and lead arrangement required for a complex multi-channel audio device, but the supplied search results do not expose a complete verified pinout or internal block description. Use the official or archived manufacturer datasheet for pin assignments, control maps, signal-path details, recommended application circuitry, and electrical characteristics. The device is not a power semiconductor, so a safe-operating-area chart is not applicable. Its design should be evaluated around signal integrity, grounding, supply bypassing, control-bus compatibility, channel routing, and thermal performance in the final enclosure. This page combines verified distributor listings, package information, sourcing links, and engineering caveats without inventing unavailable electrical values.

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BD3817KS

BD3817KS - 7-Ch Audio Signal Processor | ROHM Semiconductor

The ROHM Semiconductor BD3817KS is a 7-channel audio signal processor with a 10-channel input selector, 0.001% THD+N, and adjustable gain from 0 dB to 7 dB in a 100-SQFP package measuring 14 mm by 20 mm. It is designed for high-fidelity audio systems that require centralized volume control and selection among multiple audio sources. An audio signal processor is an integrated circuit that manipulates or routes audio signals while adding control functions such as channel selection, volume adjustment, or gain control. Within the broader semiconductor hierarchy, the BD3817KS belongs to the signal-processing and power-management electronics used in consumer audio, home-theater, and professional audio equipment. Its combination of seven volume-controlled channels and a ten-source selector reduces the need for separate analog routing components. The principal documented features are seven volume-control channels, ten input-selection channels, 0.001% total harmonic distortion plus noise, and a gain-control range of 0 dB to 7 dB. The 100-SQFP package provides 100 electrical contacts in a relatively compact surface-mount footprint. The verified distributor listing describes the device as an audio signal processor rather than a power amplifier, so it should be positioned upstream of output amplification stages. BD3817KS integrates routing and gain control into one dedicated audio-processing device. A 10-channel input selector can organize multiple source paths, while seven independent volume channels support multi-zone or multi-speaker systems. The stated 0.001% THD+N specification is appropriate for evaluating signal-integrity requirements, although the applicable frequency range, measurement bandwidth, and test conditions are not present in the supplied data and should be confirmed in the manufacturer datasheet before design release. Typical uses include home-theater receiver routing, multi-zone listening systems, professional audio consoles, and other equipment combining several analog sources with independent level control. In a home-theater design, the processor can select among set-top-box, disc, console, and auxiliary inputs before the selected channels feed external amplifiers. In an active-speaker or amplifier platform, the same approach supports separate level adjustment for surround or zone channels. PCB implementation should preserve the analog signal paths associated with each selected channel and provide appropriate grounding and decoupling. The verified data does not state the supply voltage, exposed-pad connection, recommended capacitor values, or exact pin assignments, so these details must be taken directly from the manufacturer datasheet. A 100-pin footprint also requires careful component placement to keep routing short and preserve signal integrity. This product record combines the verified distributor identity, channel configuration, package information, THD+N figure, gain range, sourcing links, and application-oriented design guidance. It also distinguishes documented facts from unresolved parameters that require datasheet confirmation, avoiding unsupported substitutions or misleading drop-in recommendations.

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BD3818KS

BD3818KS - 6-Channel 5.1ch Audio Processor | ROHM

The ROHM Semiconductor BD3818KS is a 5.1-channel sound processor that integrates a mode selector, a five-channel input selector, six-channel volume control, gain amplification, bass, treble, mixing, and dynamic bass boost. The device is supplied in an 80-SQFP package measuring 14 mm by 14 mm. According to the manufacturer datasheet, its six-channel master volume range extends from 0 to -95 dB in 1 dB steps, with mute support. An audio sound processor is a specialized semiconductor that controls and conditions multiple audio channels before they reach amplifiers or transducers. Within the broader product hierarchy, the BD3818KS belongs to the audio signal processor class, which is distinct from a power amplifier. Its role is to select sources, set channel levels, apply tone and dynamic-bass functions, and combine the resulting channels into a usable 5.1-channel signal path. The principal functions documented for the BD3818KS include independent six-channel master volume, a five-channel input selector, a gain amplifier, bass control, treble control, mixing, and dynamic bass boost. The mode and input selectors allow an audio system to route selected sources more flexibly than a fixed analog mixer. The 1 dB volume-step resolution provides finer level adjustment than a continuously variable control implemented solely with external passive components. The BD3818KS and BD3811K1 share the same 5.1-channel sound-processor concept and integrated mode and input selectors. The BD3818KS adds mixing and dynamic bass boost, while the BD3811K1 uses bass boost instead. This distinction is important when comparing the two parts because their control features are not interchangeable even though both devices are associated with the same family documentation. Typical uses include home-theater preamplifier and selector boards, multichannel amplifier control systems, car-audio controllers, and powered speakers that require centralized channel-volume and tone adjustment. The device is intended for systems in which source selection, channel balance, and low-frequency enhancement are implemented digitally or through a remote-control bus rather than by discrete potentiometers. A successful design should preserve the recommended analog signal path, connect decoupling capacitors close to the supply pins, and route all six channels consistently to the downstream amplifier inputs. Designers should also verify the exact control logic, reference-voltage requirements, supported input levels, and unused-pin treatment against the manufacturer datasheet before releasing production artwork. This page consolidates the verified product identity, package information, distributor availability references, function summary, family comparison, and design considerations for the BD3818KS. It also identifies which electrical, pin-level, pricing, compliance, and lifecycle details still require confirmation from the original manufacturer documents.

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BD3822FS-E2

BD3822FS-E2 - Dual-Channel Audio I/O IC | ROHM Semiconductor

ROHM Semiconductor BD3822FS-E2 is a dual-channel audio signal processor and NTSC/PAL audio I/O interface designed for recording and playback equipment such as DVD recorders. The device is specified for a 9 V operating supply, an ambient operating range of -40°C to +85°C, and a 32-pin SSOP package measuring 5.40 mm in width with 0.8 mm lead pitch. Its primary role is to condition and route audio signals within consumer video and audio equipment. An audio I/O interface is a type of signal-processing integrated circuit that connects analog audio circuitry to the recording or playback signal path. It belongs to the broader audio IC hierarchy, which includes audio amplifiers, codecs, signal processors, converters, and interface controllers. Unlike a power amplifier that primarily drives speakers or headphones, the BD3822FS-E2 manages signal compatibility, channel processing, and system-level audio routing. The BD3822FS-E2 provides two audio channels in a compact 32-pin SSOP-A package. This channel count allows a dual-channel audio path in equipment that must support both recording and playback functions. The 0.8 mm package pitch supports high-density board layouts while retaining a package format commonly used in consumer electronics and legacy multimedia systems. Its stated 9 V supply requirement places it in equipment designed around a nominal 9 V analog power rail. The device is identified as a multi-functional gate and audio I/O interface supporting NTSC and PAL video-system audio applications. This positioning makes it relevant to DVD recorders and related NTSC/PAL audiovisual equipment. Because the interface operates on analog audio signals, board design must account for grounding, signal routing, input/output isolation, and the separation of analog and digital power or return paths where both coexist on the same board. Typical uses include DVD recorder audio boards, NTSC and PAL video equipment, dual-channel recording interfaces, and legacy consumer audiovisual systems. In these applications, the BD3822FS-E2 can serve as the central audio I/O block when the surrounding circuit requires coordinated handling of left and right audio paths. Its operating-temperature range covers both commercial and industrial ambient conditions, although each assembly still requires normal thermal and signal-integrity validation. When designing a replacement circuit, verify the complete pin assignment, exposed connections, power sequencing, and external component requirements against the ROHM Semiconductor BD3822FS datasheet before connecting the IC. The package dimensions alone do not establish pin compatibility. In particular, analog input and output routing, supply decoupling, control logic, and any external crystal or timing components must match the original board architecture. This product record combines the BD3822FS-E2 device identity, package information, documented operating conditions, source links, and application guidance. It also distinguishes the exact -E2 ordering code from the broader BD3822FS family and identifies where engineering verification is required before using the device as a drop-in replacement on an existing PCB.

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BD3823FV-E2

BD3823FV-E2 5-Channel Audio Processor | ROHM Semiconductor

The ROHM Semiconductor BD3823FV-E2 is a 5-channel audio signal processor with a 3.2 uVrms low-noise specification, 0.0015% low distortion, and a 20-pin SSOP-B surface-mount package. It operates from 7 V to 14.5 V and supports NTSC and PAL audio systems. The device combines channel selection with a resistor-ladder volume function for multichannel audio recording equipment. An audio signal processor is an interface IC that conditions, selects, and controls multiple audio paths within an entertainment system. Its place in the product hierarchy is audio signal processor, interface IC, audio subsystem, and electronic control component. The BD3823FV-E2 is intended specifically for DVD recorders and related consumer-video equipment where several standard audio channels must be routed while keeping the reproduced signal quiet and acoustically transparent. The primary features include five-channel selection, low output noise of 3.2 uVrms, and low distortion of 0.0015%. Its 7 V to 14.5 V operating range accommodates the supply voltages commonly found in multi-rail consumer-electronics equipment, while its -40°C to +85°C operating-temperature range supports industrial temperature conditions. An I2C interface permits a host controller to configure the processor rather than relying exclusively on mechanical switches. The 20-pin SSOP-B package uses surface-mount technology and provides a compact implementation for audio-processing functions. Because the package has closely spaced leads, assembly processes should be qualified for the specified lead pitch and soldering profile. The device integrates multiple signal-processing functions instead of requiring a separate selector and volume-control arrangement, reducing the number of discrete signal-path components in a DVD recorder. Typical uses include DVD recorder audio routing, NTSC and PAL video-system audio interfaces, multichannel consumer-audio selection, and embedded audio-control subsystems. The processor can serve as the central interface between audio sources, amplifier or codec stages, and the recorder's system controller. Its low-noise and low-distortion characteristics are especially relevant where preserving the original recording signal is more important than simply switching channels. Design the power rails so that the 7 V to 14.5 V operating range is maintained under load, and place the device's decoupling capacitors close to the supply and ground connections. Confirm the board footprint and pin orientation against the ROHM Semiconductor datasheet before layout release. PCB review should also check signal return paths, ground continuity, and keepouts around the SSOP-B leads. This page combines the ROHM Semiconductor device description, package and operating characteristics, sourcing guidance, and practical design considerations into a focused engineering reference. It also distinguishes documented functions from parameters that require confirmation in the manufacturer datasheet, helping engineers evaluate the BD3823FV-E2 before committing a board design to this specialized audio interface.

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BD3824FS-E2

BD3824FS-E2 - 2-Ch I2C Audio Signal Processor | ROHM | SSOP-32

The ROHM Semiconductor BD3824FS-E2 is a single-chip 2-channel audio signal processor (audio I/O interface IC) built for NTSC/PAL DVD recorder and DVD player audio paths, housed in a 32-pin SSOP-A32 (PDSO32) surface-mount package. It operates from a single 9 V analog supply, is specified over -40 °C to +85 °C ambient, and is fabricated on a BICMOS process. An audio signal processor, also called a sound processor or audio I/O interface IC, is a mixed-signal block that sits between the analog line/tuner input stage and the system's digital-audio or DAC subsystem. Its job is to select the correct source, apply programmable gain and volume, and provide automatic level control so that recorded and played-back material keeps consistent loudness. In the broader hierarchy it belongs to signal-chain ICs -> audio processing -> audio amplifiers and special-purpose analog ICs. The BD3824FS integrates a 5-channel input selector, input gain control, tuner gain control, automatic level control (ALC), a line amplifier, a 2-channel volume control circuit and a power-save ON/OFF function, all addressed over an I2C bus. Because every gain stage is digitally trimmable, a single board revision can serve multiple tuner and line-input routings without changing external passive networks. The datasheet also highlights low distortion and low noise as primary design targets for the audio path. Because the I2C interface, ALC loop and volume block share one silicon die, the chip reduces external op-amps, switches and log/antilog networks. The BD3822FS sibling covers the level-meter and volume role, while BD3824FS covers the line-amplifier role; the two parts are pin compatible, so one board pattern supports both a high-end and a low-end model. Typical uses include DVD recorder and DVD player analog audio boards, NTSC/PAL video deck audio front ends, set-top and video/audio combination decks, and other legacy consumer playback/record equipment that still relies on I2C-programmable analog level control. When laying out the board, keep the I2C pull-ups short and route them away from the audio input traces; the ALC and gain stages amplify whatever noise couples in from the input pins. Also respect the single 9 V analog rail and decouple it locally, since supply ripple modulates the gain stages and the ALC detector. This page brings together the distributor channel listings, the pin-compatible family relationship between BD3822FS and BD3824FS, and practical design notes on I2C control, ALC behaviour and analog layout that are not collected together in the manufacturer datasheet.

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BD3825FS-E2

BD3825FS-E2 - 2-Channel Audio Switch | ROHM Semiconductor

The ROHM Semiconductor BD3825FS-E2 is a two-channel audio switch IC intended for DVD recorder audio I/O routing. It is identified as a 24-pin SSOP-A device with a 0.8 mm multi-lead package and 5.40 mm overall width. The device is designed to route multiple audio input lines according to commands from a video-signal LSI or a microcontroller. The BD3825FS-E2 belongs to the audio switch and audio interface IC category. An audio switch IC is a signal-routing semiconductor that connects, disconnects, or selects audio paths within an electronic system. This type of interface IC sits between audio sources, amplifiers, recorders, and system control logic. It is different from an audio amplifier, which increases signal power, because the BD3825FS-E2 primarily controls signal selection and routing. ROHM identifies the BD3825FS as a device for PAL DVD recorders. The related application information states that the switch and frequency-synthesis outputs are controlled by the BD3825FS, while the device is controlled through the I2C bus of the BH7624KS2 video-signal LSI. When used independently, pins 1, 2, 6, 7, 10, and 12 must be controlled by the microcontroller. This makes the part suitable for systems that need programmable selection of multiple audio input lines. The BD3825FS-E2 is packaged in a 24-SSOP-A configuration. Its compact surface-mount format supports dense consumer-electronics layouts while providing separate control and signal-routing connections. The -E2 ordering suffix identifies the exact ROHM catalog variant used in distributor listings. A 24-SOP listing identifies the body width as 0.213 inches, equivalent to 5.40 mm, with a 0.8 mm lead pitch. The switch is intended for DVD recorder audio interfaces and related multimedia equipment. In a typical implementation, a controller writes the required routing state to the BD3825FS, which then selects the appropriate audio path for recording, playback, or external input. The design must account for the device-specific control pins, pull-down requirements, signal levels, and the exact pin-assignment table in the manufacturer datasheet. This product page focuses on BD3825FS-E2 identification, package information, application fit, and practical selection considerations. It is intended to help engineers locate the correct datasheet, verify footprint compatibility, and determine whether the device matches the audio-routing architecture used in DVD recorder and related equipment.

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BD3826FS-E2

BD3826FS-E2 - 3-Channel Audio Switch | ROHM Semiconductor

ROHM Semiconductor BD3826FS-E2 is a three-channel audio signal switch IC for DVD recorders, presented in a 32-SSOP-A surface-mount package. The device accepts a 2.5 V to 5.5 V supply range and provides analog signal routing for multi-channel audio systems. Its 32-pin package supports the control and signal connections required by a complex consumer-audio signal path. An audio switch IC is an interface component that routes left, right, and related analog audio channels between circuit sections. In the broader electronics hierarchy, it belongs to the audio interface IC class, connects to signal-path ICs such as amplifiers, codecs, and converters, and ultimately supports complete consumer-audio systems. Its primary role is channel selection rather than signal amplification or digital-to-analog conversion. The BD3826FS-E2 is identified as a three-channel switch with a 2.5 V to 5.5 V operating range. These characteristics make it suitable for low-voltage, multi-channel consumer equipment in which several analog sources must be selected and passed to downstream audio circuitry. The manufacturer identifies DVD-recorder signal switching as a principal application for the BD3826FS family. The 32-SSOP-A construction provides a practical surface-mount footprint for compact boards while exposing the control and analog-channel connections required by a three-channel device. Because this is an analog routing component, board-level implementation must account for source impedance, grounding, channel isolation, and the prevention of unwanted pop or noise. Stable supply decoupling and short signal traces are particularly important when the switch sits close to amplifiers or system ground references. Typical uses include DVD-recorder audio routing, stereo and multichannel entertainment equipment, analog source selection, and other consumer-audio products that require coordinated switching of multiple signals. The BD3826FS-E2 is most appropriate when the design uses a compatible three-channel routing architecture and can verify the complete pin assignments and control timing against the manufacturer datasheet before layout approval. Designers should verify the pin description table, control logic, recommended application circuit, and external-component requirements in the ROHM datasheet. If the original PCB has already been laid out for this device, preserve its footprint and verify signal levels against the downstream amplifier input range. A footprint-compatible replacement should not be assumed unless its pinout, control interface, supply range, and channel behavior have been checked directly. This product record combines the verified identity, package, channel count, supply range, application, and ordering information with structured design guidance for signal integrity, layout, and replacement assessment. It also distinguishes a true pin-compatible substitute from merely related audio-switching devices, helping engineers make a controlled sourcing decision without changing the board architecture.

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