BU9409FV is a digital audio sound processor used for thin TVs. Digital signal processor is Rohm original DSP only for TV sound signal processing, and it’s cost performance is excellent. Digital inputs are two lines. Output is digital output corresponding to 2.1ch or play of sub-voice L/R signal.
The BU9409FV is a 32‑bit digital audio sound processor designed for thin‑panel TVs. It features two stereo digital inputs (16/20/24‑bit I2S) and two stereo digital outputs (16/20/24‑bit I2S and S/PDIF) for 2.1‑channel audio processing.
The note details electrical characteristics, pin assignments, command‑interface timing, and ordering information, including package dimensions and tape‑and‑reel specifications.
| Data width | 32bit (Data RAM) |
|---|---|
| Quickest machine cycle | 40.7 ns |
| Multiplier | 32 x 24 |
| Sampling frequency | 48 kHz |
| Operating voltage | 3.0 ~ 3.6 V |
| Operating temperature range | -25 °C ~ +85 °C |
| Digital input ports | 2 stereo, 16/20/24‑bit I2S |
| Digital output ports | 2 stereo, 16/20/24‑bit I2S and S/PDIF |
The device operates from 3.0 V to 3.6 V.
It provides two stereo digital input ports (16/20/24‑bit I2S) and two stereo digital output ports (16/20/24‑bit I2S plus S/PDIF).
The device is rated for temperatures from –25 °C up to +85 °C.
The DSP includes 256 words of 32‑bit data RAM.