32bit Audio DSP - BU9414FV

This LSI is the digital sound processor which made the use digital signal processing for FPD TVs.
DSP of ROHM original is used for the TV sound processor unit, and it excels in cost performance.
There are two digital input systems. An output is a digital output corresponding to 2.1ch.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BU9414FV-E2 Active SSOP-B40 2000 2000 Taping Yes
Vcc(Min.)[V] 3.0
Vcc(Max.)[V] 3.6
Iq[mA] 15.0
I/F 2 wire port
Digital Audio I/F I2S SPDIF
Additional Feature P²Volume, P²Bass, P²Bass+, P²Treble, 7band P-EQ, 3band Tone, Surround, 2band DRC
Sampling Rate(Max.)[kHz] 48
Multi Input Stereo 2
Volume Range +24to-103 dB
Volume Step 0.5
Tone Control Band BASS, Middle, Treble
Operating Temperature (Min.)[°C] -25
Operating Temperature (Max.)[°C] 85
  • ・ Digital Signal Processor unit Word length: 32bit (Data RAM) The fastest machine cycle: 40.7ns (512fs, fs = 48kHz) Multiplier: 32 x 24 → 56bit Adder: 32 + 32 → 32bit Data RAM: 256 x 32bit Coefficient RAM: 128 x 24bit Sampling frequency: fs = 48kHz Master clock : 512fs (It is a slave to 256fs of fs = 48kHz, 44.1 kHz, and 32 kHz)
    ・ Digital signal input (Stereo 2 lines): 16/20/24bit(I2S, Left-Justified, Right-Justified) Digital signal output (Stereo 2 lines): 16/20/24bit(I2S, Left-Justified, Right-Justified, S/PDIF)
    ・ The sound signal processing function for FPD TVs Pre-Scaler, DC cut HPF, Channel Mixer, P2Volume(Perfect Pure Volume), BASS, MIDDLE, TREBLE, Pseudo BASS, Surround, P2Bass, P2Treble, 7Band Parametric EQ, Master Volume, L/R balance, Post-Scaler, Output signal clipper (P2Volume, P2Bass, and P2Treble are the sound effect functions of ROHM original.)
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Thermal Resistance