5.1ch/7.1ch Sound Processors with Built-in Micro-step Volume - BD3474KS2

These sound processors with µ-step volume control utilize the most advanced shock noise prevention technology in the industry for high fidelity audio reproduction in home theater systems.

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* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
BD3474KS2 Active SQFP-T80C 500 50 Tray Yes
Vcc(Min.)[V] 13.0
Vcc(Max.)[V] 15.0
Iq[mA] 60.0
I/F 2-wire
Outputs 6
Volume Range +24to-95dB 0.5dB / step
Tone Control Band BASS, Treble
Input Gain[dB] -
THD[%] 4.0E-4
Output Noise[µVrms] 1.5
Output voltage(Max.)[Vrms] 4.2
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
  • ・ Micro-step Volume : +24 ~ -95dB / 0.5dB step, Mute
    ・ Stereo Input Selector: IN1 ~ IN12, Mute
    ・ Mode Selector: LINE, MULTI1, MULTI2, Mute
    ・ REC Output: 4 stereo output
    ・ MAIN Output: 1 stereo output
    ・ Input Attenuator for ADC: 0, -6, -6.5, -7.5, -9, -12, Mute
    ・ 2 Band Equalizer : +10 ~ -10dB / 1dB step
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New Products:
Technical Data
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.