The TDA9859 is a universal hi-fi audio processor for TV with multi-source selector, crossbar switch, loudspeaker channel and peri-TV connector (SCART).
The TDA9859 is a universal hi‑fi audio processor designed for TV applications. It offers a multi‑source selector that can handle six audio inputs (three stereo or six mono) and provides cross‑bar switching to loudspeaker and SCART outputs. Control of all functions is possible via an I²C‑bus, with settings stored in sub‑address registers.
Key features include selectable stereo, pseudo‑stereo and forced‑mono modes, volume, bass and treble controls, mute function with up to 85 dB attenuation, and external surround‑sound decoder support. The datasheet lists electrical characteristics, thermal data, pin‑out for SDIP32 and QFP44 packages, and ordering information.
| Supply voltage (Vp) | 7.2 V min – 8.8 V max (typ 8.0 V) |
|---|---|
| Supply current (Ip) | 25 mA |
| Total harmonic distortion (THD) | 0.1 % |
| Signal‑to‑noise ratio (S/N) | 85 dB |
| Ambient temperature range | 0 °C to 70 °C |
| External load resistance (RL) – MOUT output | 10 kΩ |
| Volume control range | -63 dB to +15 dB |
The supply voltage Vp can be as low as 7.2 V, typically 8.0 V, and up to 8.8 V.
It supports six AF inputs, which can be configured as three stereo sources or six mono sources.
The THD is specified as 0.1 %.
Yes, all functions can be controlled through the I²C‑bus, with settings stored in sub‑address registers.