PT12913 2 Band Car Audio Processor DESCRIPTION The PT12913 is a 2 band audio signal processor specially designed for car radio applications. The device includes a high performance audio processor with fully integrated audio filters. The digital control allows programming in a wide range of filter characteristics. APPLICATION • Car Audio System FEATURES • 3 SE stereo inputs and 1 Quasi-Differential input with selectable input gain • Input gain control: 0 to +20dB, 1dB/step • 2 channels electronic volume with soft step function: +15 to -79dB with 1dB/step • Soft mute • Tone control (Bass and Treble): -20 to +20dB, 1dB/step with softstep . Bass: f0=100Hz, Q=1.0 . Treble: f0=10KHz, Q=1.25 • Loudness: 0 to 20dB, 1dB/step with softstep function. • 4 independent speaker outputs with softstep volume: +15 to -79dB with 1dB/step • Controlled by I2C BUS interface • Low distortion and low noise • 20-pin SSOP package BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT12913 APPLICATION CIRCUIT 10μF 1 CREF GND 20 2 SE1L SDA 19 3 SE1R SCL 18 4 SE2L VDD 17 5 SE2R OUTLF 16 2.2μF 2.2μF 2.2μF 2.2μF 10μF 47k 10μF 47k 10μF 47k 10μF 47k 2.2μF SE3L 6 OUTRF 15 2.2μF 7 2.2μF 8 SE3R OUTLR DIFFL OUTRR 14 13 10μF 9 DIFFG NC 12 10 DIFFR MUTE 11 2.2μF ORDER INFORMATION Part Number PT12913-X V1.1 Package Type 20 Pins, SSOP, 150mil 2 Top Code PT12913-X November 2012 PT12913 PIN CONFIGURATION CREF 1 20 GND SE1L 2 19 SDA SE1R 3 18 SCL SE2L 4 17 VDD SE2R 5 16 OUTLF SE3L 6 15 OUTRF SE3R 7 14 OUTLR DIFFL 8 13 OUTRR DIFFG 9 12 NC DIFFR 10 11 MUTE PT12913 PIN DESCRIPTION Pin Name CREF SE1L SE1R SE2L SE2R SE3L SE3R DIFFL DIFFG DIFFR Mute N.C OUTRR OUTLR OUTRF OUTLF VCC SCL SDA GND V1.1 I/O O I I I I I I I I I I O O O O I I/O - Description Reference capacitor Single-ended input 1 left channel Single-ended input 1 right channel Single-ended input 2 left channel Single-ended input 2 right channel Single-ended input 3 left channel Single-ended input 3 right channel Quasi-differential input left channel Quasi-differential input ground Quasi-differential input right channel Hardware/external Mute control pin No connection Rear right output Rear left output Front right output Front left output Power supply I2C bus clock I2C bus data Ground 3 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 November 2012 PT12913 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.1 20 November 2012