TDA7439DS13TR STMicroelectronics

TDA7439DS Three-band digitally-controlled audio processor Features Input multiplexer four stereo inputs selectable input gain for optimal adaptation to different sources Single stereo output Treble, mid-range and bass control in 2-dB steps SO28 Volume control in 1-dB steps processor for quality audio applications in car-radio and Hi-Fi systems. Selectable input gain Two speaker attenuators: is provided. All the functions are controlled by two independent speaker controls in 1-dB serial bus. steps for balance facility The AC signal setting is obtained by resistor independent mute function networks and switches combined with operational All functions are programmable via serial bus. amplifiers. The TDA7439DS employs BIPOLAR/CMOS Description technology to provide low distortion, low noise The TDA7439DS is a volume, tone (bass, and DC stepping. mid-range and treble) and balance (left/right) Table 1. Device summary Order codes Package Packaging TDA7439DS SO28 Tube TDA7439DS13TR SO28 Tape and Reel November 2007 Rev 4 1/23 www.st.com 23Contents TDA7439DS Contents 1 Block diagram and pin out 3 2 Electrical specifications 4 3 Application suggestions 8 3.1 Tone control 8 3.1.1 Bass, mid-range stages 8 3.1.2 Treble stage . 9 3.2 Pin CREF 9 3.3 Electrical characteristics . 9 2 4I C bus interface . 11 4.1 Data validity . 11 4.2 Start and stop conditions . 11 4.3 Byte format 11 4.4 Acknowledge 11 4.5 Transmission without acknowledge . 11 4.6 Interface protocol . 12 2 5I C bus transmission examples . 13 5.1 No address incrementing . 13 5.2 Address incrementing 13 2 6I C bus addresses and data 14 6.1 Chip address byte 14 6.2 Sub-address byte . 14 6.3 Data bytes 14 7 Chip input/output circuits 19 8 Package information 21 9 Revision history . 22 2/23