TEA0679T is a dual Dolby B noise reduction circuit with head and equalization amplifiers for use in car radios.
The TEA0679T is an I2C-bus controlled integrated circuit designed for playback applications, specifically targeting car radio systems. It features two channels of Dolby B-type noise reduction, including head preamplifiers and reverse head switching capabilities.
Key functions such as Automatic Music Search (AMS), blank skip detection, mute control, and equalization time constant adjustment are managed via the I2C bus or optional TTL-compatible pins. The device operates with a supply voltage range of 7.6 to 12 V and is contained in a 32-pin small outline package.
| Signal-to-Noise Ratio | 78 dB |
|---|---|
| Operating Ambient Temperature | -40 to +85 °C |
| Storage Temperature | -55 to +150 °C |
| Package Type | 32-pin plastic small outline package (SOT287-1) |
The device operates correctly only if the 0 dB Dolby level is adjusted at 387.5 mV.
Yes, these functions can be controlled via separate optional pins if required.