BD3813KS-E2 - 6-Channel Audio Processor | ROHM Semiconductor
MPN: BD3813KS-E2 ✗ End of LifeBD3813KS-E2 Overview
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.
Drop-in alternatives for BD3813KS-E2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
BD3815KS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
BD3813KS-E2 Maximum Ratings & Electrical Characteristics
| Product Type | 6-channel audio signal processor |
| Channel Count | 6 channels |
| Wide Dynamic Range | 129 dB (tone bypass, VOL=MUTE, IHF-A) |
| Master Volume Attenuation Range | 0 dB to -95 dB |
| Mute Step | 1 dB per step |
| Maximum Output Voltage | 4.2 Vrms at VCC=7 V, VEE=-7 V, RL=10 kohm |
| Supply Voltage Range | 10 V to 14.6 V |
| Process Technology | Bi-CMOS |
| Control Interface | 2-wire bass and treble control |
| Volume Control Method | Resistance ladder type |
| Package | 56-pin SQFP, 10 mm x 10 mm |
| Mounting Type | Surface mount |
| Product Classification | Audio signal processor |
| Intended Audio Configuration | 6.1-channel audio |
| RoHS Status | Compliant |
BD3813KS-E2 56-pin sqfp, 10 mm x 10 mm Pin Configuration Guide
Pin configuration for BD3813KS-E2 (56-pin sqfp, 10 mm x 10 mm package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for BD3813KS-E2.
Refer to the datasheet for full pin configuration.
Typical Applications
BD3813KS-E2 is suitable for 6 applications: 5.1-Channel Home-Theater Receiver, 6.1-Channel AV Receiver, Multichannel Mini-Component Stereo System, Active Multichannel Speaker, Car Audio Multi-Channel Amplifier, Analog Audio Preamplifier Console.
5.1-Channel Home-Theater Receiver
The BD3813KS-E2 fits the preamplifier stage of a 5.1-channel home-theater receiver because it provides six independent master-volume channels, each adjustable from 0 dB to -95 dB in 1 dB steps. Its specified 129 dB dynamic range and resistance-ladder switching architecture help reduce residual noise and audible shock sounds as channel levels change. Place the processor between source or line-level amplification and the power-amplifier inputs, while following the datasheet for bypass capacitors, tone networks, and dual-rail support. The key design trade-off is integration: fewer discrete attenuator stages simplify channel coordination, but the system must preserve adequate analog headroom and clean power rails.
Recommended
6.1-Channel AV Receiver
The BD3813KS-E2 is directly suited to the six main-channel and subwoofer signal organization described for 6.1-channel equipment. Independent attenuation across six channels allows the receiver to balance surround levels and the subwoofer without duplicating analog control circuitry. Its 10 V to 14.6 V operating range and maximum 4.2 Vrms output under the specified +7 V/-7 V, 10 kohm condition help define the available signal headroom. Engineers should design the upstream and downstream stages around those limits, decouple the supply rails, and use the manufacturer application circuit as the reference for input and output loading.
Recommended
Multichannel Mini-Component Stereo System
A compact mini-component system can use the BD3813KS-E2 to consolidate master-volume attenuation and bass/treble adjustment for multiple amplifier channels. The integrated two-wire tone-control interface reduces control-routing complexity compared with a network of discrete potentiometers and switching circuits. Its Bi-CMOS implementation and resistance-ladder control method are designed to limit residual noise and switching shock. In a space-constrained enclosure, the 10 mm by 10 mm SQFP package helps reduce board area, but careful ground partitioning, short analog traces, stable bypass connections, and thermal-aware assembly remain necessary for low-noise performance.
Recommended
Active Multichannel Speaker
The BD3813KS-E2 is useful in an active multichannel speaker when several amplifier inputs require coordinated level control before power amplification. Six separately adjustable master-volume paths can balance a surround speaker set or provide channel-specific attenuation. The 129 dB dynamic-range specification is relevant to preserving quiet program material, while the resistance-ladder control approach addresses audible level-switching transients. The implementation must account for the processor's analog signal level, dual-rail supply arrangement, output load, and the gain requirement of the downstream power amplifier; merely matching the power-amplifier input rating does not guarantee a valid signal-chain design.
Recommended
Car Audio Multi-Channel Amplifier
The BD3813KS-E2 can support channel-level attenuation in a multi-zone or multi-channel car-audio signal path where separate volume control is useful. Its independent six-channel volume architecture simplifies matching front, rear, center, and subwoofer levels before the power-amplifier stages. The low-current Bi-CMOS design is advantageous in space-constrained audio equipment, while the specified switching-noise reduction improves perceived quality during level adjustment. Automotive implementation must separately confirm environmental qualification, temperature range, vibration handling, transient protection, and system grounding because those requirements are not established by the available product information.
Recommended
Analog Audio Preamplifier Console
The BD3813KS-E2 suits an analog preamplifier console requiring master attenuation and tone control across several outputs. Each of its six channels can be reduced from 0 dB to -95 dB in 1 dB increments, providing fine control without exposing the user to coarse attenuation steps. The resistance-ladder circuit helps reduce residual noise and switching shock, while the maximum 4.2 Vrms output specification establishes a useful benchmark for the downstream amplifier input. A successful console layout should keep input, output, ground, and control traces separate, reference the application schematic for component values, and verify thermal performance during sustained high-level operation.
Recommended
Recommended Products Summary
Engineering reference data for BD3813KS-E2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BD3815KS |
|---|---|---|
| Package | 56-SQFP (10 mm x 10 mm) | 56-SQFP (10 mm x 10 mm) |
| Brand | ROHM Semiconductor | ROHM Semiconductor |
| Product Type | 6-channel audio signal processor | Audio sound processor |
Key Differentiators
- Independent six-channel master-volume control (vs BD3815KS)
- Wide specified dynamic range (vs BD3815KS)
- Integrated resistance-ladder switching behavior (vs BD3815KS)
Design Notes
Route the six analog channels as matched, short paths and keep audio returns connected to the device ground reference rather than through long shared return paths. Separate the low-level input nets from the tone-control and digital control traces. The 56-SQFP package provides fine-pitch leads, so verify the land pattern, solder mask, and assembly process before releasing a PCB revision.
Follow the datasheet's recommended bypass network and supply decoupling at every supply connection. The specified 4.2 Vrms maximum output applies with VCC=7 V, VEE=-7 V and RL=10 kohm; heavier loads or less headroom can change the usable output level. Verify the power-amplifier input impedance, source amplitude, and rail conditions before assuming the processor can drive the intended load directly.
Do not treat every similarly described six-channel audio IC as a pin-compatible substitute. Compare the BD3813KS-E2 and BD3815KS pin descriptions, control levels, external tone-network values, supply pins, and application schematics before approving either as a replacement. Also verify the operating-temperature range, AEC-Q100 status, and other environmental requirements for automotive or industrial use.
Preserve the analog headroom established by the 0 dB to -95 dB volume range and use the manufacturer's loading recommendations when connecting source and power-amplifier stages. Excessive source level, inadequate return grounding, or mismatched impedance can create distortion or instability that appears to originate in the processor. Test channel-to-channel level matching and switching transients with the intended system load and supply rails.
Compliance Information
RoHS-compliant status is identified in the component specification listing. No additional reach, lead-free, halogen-free, conflict-minerals, or automotive-qualification information was established.
