AN5829

ICs for TV AN5819K Sound multiplex demodulator IC for TV in the North American market s Overview The AN5819K is a single chip IC, which includes a sound multiplex demodulator for Zenith TV system and the dbx TV sound noise reduction function. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Unit: mm 0.5±0.1 4.8±0.25 +0.1 s Features Stereo demodulation, SAP demodulation and dbx noise reduction are integrated into a single chip Enabling various kinds of adjustment and mode changeover thanks to I2C bus Built-in input volume (I2C control) for interface with intermediate frequency processing IC 26.7±0.3 8.4±0.3 1.05±0.25 3.05±0.25 s Applications TV and VCR for the North American market (A licensing agreement with THAT Corporation is necessary in order to use this IC with built-in dbx-TV noise reduction function.) 3° to 15° 10.16±0.25 0.3 –0.05 SDIP028-P-0400B s Block Diagram VCC 9 V Stereo R-out L-out GND 21 10 17 26 25 8 7 6 5 Pilot det. Matrix LED driver I2C decoder 2 3 SDA 11 Stereo filter St.PLL L+R demod. L−R demod. SAP filter Noise filter V-reg. I-reg. 13 14 28 27 9 SAP demod. SAP noise det. (L−R)/SAP switch 15 dbx de-emph. 1 16 L+R filter L−R filter SAP out filter 75 µs de-emph. 4 SAP SCL 1 I2C GND dbx de-emph. 2 dbx wide band dbx spectral Wide band filter Spectral filter 22 23 20 19 18 24 MPX in 12 Input VCA 1.778 0.9±0.25 1 AN5819K s Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 I2C GND ...