BD3484FS-E2 - 4-Channel BiCMOS Audio IC | ROHM
料号： BD3484FS-E2 ✓ 量产中BD3484FS-E2 概述
An audio special-purpose IC is a dedicated integrated circuit designed to implement a particular signal-processing function that is more specialized than a general-purpose op amp or standard interface converter. In this product category, the BD3484FS-E2 belongs to the broader hierarchy of audio ICs, analog signal-processing ICs, interface ICs, and integrated circuits. Its role is associated with four-channel tone control, allowing an equipment designer to manage multiple audio channels through a dedicated circuit rather than implementing equivalent passive networks and discrete amplification stages independently.
The principal identifiable features of the BD3484FS-E2 are its four-channel organization, BiCMOS circuit technology, 32-pin package, and RoHS-compliant construction. BiCMOS combines bipolar and CMOS functions within an integrated circuit, a useful architecture for analog audio systems that need both transistor-level signal handling and low-power logic functions. The 32-pin PDSO32/SSOP-32 package provides a high pin count for multiple channel connections, control interfaces, and support functions while retaining a surface-mount assembly format.
BD3484FS-E2 can be evaluated for multichannel tone-control boards, mixer subsystems, active speaker electronics, audiovisual receivers, and other audio products in which four signal paths require coordinated adjustment. Before finalizing a design, engineers should confirm the device’s exact gain, attenuation, frequency-response, control-voltage, supply-voltage, and channel-routing characteristics against the manufacturer datasheet. Those parameters determine whether the circuit topology can be used directly or requires added external components.
A practical implementation places the IC close to the audio signal paths and separates high-gain routing from sensitive control circuitry. Short signal traces, stable reference and feedback networks, and appropriate grounding are especially important when the device processes multiple channels. Designers should also confirm decoupling requirements, control-interface logic levels, and the permitted input or output signal range before laying out the printed circuit board.
The main engineering trade-off is functional integration. A dedicated four-channel tone-control IC can reduce duplicated discrete circuitry, simplify control layout, and shorten signal paths, but it also creates a design dependency on one IC’s fixed internal characteristics. Validation with representative audio levels and intended control ranges remains essential even when the package and basic channel count are suitable.
This product record combines the verified device identity, package information, channel count, BiCMOS technology, RoHS status, source links, application guidance, and sourcing workflow. It is intended to help engineers locate the datasheet, assess board-level suitability, and request current commercial availability without relying on changing marketplace quotations.
直接替换替代料： BD3484FS-E2 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料BD3484FS-E2 规格参数
| Manufacturer | ROHM Semiconductor |
| Product Type | Audio special-purpose IC |
| 功能 | Tone-control circuit |
| Number of Channels | 4 channels |
| Process Technology | BiCMOS |
| Package Name | PDSO32 |
| Package Family | SSOP-32 |
| Total Pin Count | 32 pins |
| Mounting Format | Surface mount |
| RoHS 状态 | Compliant |
BD3484FS-E2 ssop-32 引脚配置指南
BD3484FS-E2（ssop-32 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： BD3484FS-E2.
请参阅 数据手册 以查看完整引脚配置。
典型应用
BD3484FS-E2 适用于 6 应用s: Multichannel Tone-Control Board, Active Speaker Control Electronics, Multichannel Audio Mixer, Home Theater Audio Processing, Audio Instrument Signal Conditioning, Audio Interface Control Card.
Multichannel Tone-Control Board
The BD3484FS-E2 fits a dedicated four-channel tone-control board used to adjust multiple audio paths consistently in mixers, signal conditioners, and playback equipment. Its four-channel BiCMOS organization allows one controller to manage several related signals instead of duplicating discrete tone networks. Before layout, confirm the manufacturer’s gain, attenuation, control-voltage, and frequency-response limits for every channel. The 32-pin PDSO32/SSOP-32 package also requires careful assignment of signal and control pins, short routing between the IC and passive networks, and stable grounding to limit channel-to-channel interaction.
Active Speaker Control Electronics
The four-channel architecture of the BD3484FS-E2 can support active-speaker electronics where separate left, right, center, or auxiliary paths require consistent tonal adjustment. Because the device is a dedicated tone-control circuit, it should sit between the relevant audio signals and the downstream power-amplifier stages. Confirm that the input and output signal ranges remain within the manufacturer’s limits, and verify the required control interface before assigning microcontroller or rotary-switch signals. Keep sensitive control nodes away from output routing, and use the manufacturer’s recommended decoupling and passive networks to preserve predictable behavior across all four channels.
Multichannel Audio Mixer
BD3484FS-E2 applications can include compact analog mixers in which several source channels need coordinated bass, treble, or other tonal adjustment. Its four-channel BiCMOS implementation provides a dedicated path for processing multiple audio streams while reducing the amount of duplicated discrete control circuitry. The key design step is to verify whether the intended mixer architecture matches the device’s channel routing, signal attenuation, and control characteristics. Use one consistent reference network for the four channels when channel matching matters, maintain short traces around the IC, and validate gain interaction and control range across the full operating signal level.
Home Theater Audio Processing
The BD3484FS-E2 can be evaluated for the tone-control stage of a home-theater signal path handling several named audio channels before power amplification. Its dedicated four-channel structure is attractive when the design requires independent adjustments without duplicating passive networks for every path. However, the manufacturer datasheet must be used to confirm whether the device’s bandwidth and control range meet the intended program material and channel levels. Treat the IC as one element of the signal chain, preserve adequate grounding around the audio inputs and outputs, and verify compatibility with the source selection, surround processing, and volume-control circuitry used elsewhere in the receiver.
Audio Instrument Signal Conditioning
The BD3484FS-E2 may suit audio-instrument or professional playback equipment that needs four coordinated tone-adjustment paths for multiple outputs or processing zones. The dedicated tone-control role differs from a generic preamplifier, so the circuit should be designed around the device’s documented channel behavior rather than assumed op-amp flexibility. Confirm signal amplitude, gain, control range, and usable bandwidth against the intended source material. Keep input and feedback connections short, observe the specified bypass-capacitor arrangement, and test all channels at minimum and maximum control positions to identify any level or channel-matching differences.
Audio Interface Control Card
BD3484FS-E2 can be incorporated into a dedicated audio-interface control card that applies tonal shaping to four processed channels before they enter another converter, amplifier, or recording stage. Its four-channel BiCMOS organization makes it suitable for centralized control when each path has similar signal characteristics. Before committing to the architecture, confirm whether the interface needs true summing, differential handling, channel muting, or programmable digital control; the device should not be selected merely because it has four channels. Use a grounded control return, isolate sensitive signal routing from external control wiring, and validate the complete card against the downstream converter or amplifier input range.
工程参考数据： BD3484FS-E2 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Brand | ROHM Semiconductor |
| Package | PDSO32 / SSOP-32 |
| Pin Count | 32 pins |
| Product Type | Audio Special Purpose IC |
| Function | Tone-control circuit |
| Channel Count | 4 channels |
| Process Technology | BiCMOS |
| RoHS Status | Compliant |
关键差异点
- Dedicated four-channel tone-control architecture （对比 General-purpose four-channel audio IC)
- BiCMOS implementation for a mixed analog audio role （对比 Pure CMOS audio processor)
- Compact 32-pin integration （对比 Discrete multi-channel tone network)
设计说明
Route the four audio channels symmetrically and keep the BiCMOS device away from switching nodes and high-current return paths. Assign pins by the manufacturer’s pin-description table rather than inferring a channel order from the package drawing. Equalize the physical lengths of related control and signal routes where channel timing or level matching matters, and preserve the specified pin-1 orientation of the 32-pin PDSO32/SSOP-32 footprint.
Confirm the BD3484FS-E2’s input range, output range, gain limits, and bandwidth before choosing external resistor or capacitor values. Place the recommended bypass and frequency-setting components close to their associated pins, and keep the return path continuous beneath or adjacent to the audio paths. Prototype one complete channel first and compare its response with the other three before populating the production board.
Do not treat a generic four-channel audio IC as a drop-in replacement for the BD3484FS-E2. The target is a dedicated tone-control device, so pin compatibility also requires equivalent control logic, signal direction, gain behavior, and frequency response. Use the Request a Quote form to request a qualified substitution review when continuity of supply is important, and avoid making layout changes based only on the 32-pin package name.
合规信息
RoHS-compliant status is identified in the product information. Reach, AEC-Q100, lead-free, halogen-free, and conflict-minerals status are not established by the available material.
