TDA8740H - NXP

TDA8740H Satellite sound circuit with noise reduction

The TDA8740; TDA8740H is a multi-function sound IC for use in satellite receivers, television sets and video recorders. The pin numbers given in parenthesis throughout this document refer to the QFP44 package. CONDITIONS MIN. TYP. MAX. UNIT 8 S/N(A) = 40 dB − 5.5 10.0 −9 62 12 13.2 V 1.0 − − −6 70 2.0 7.5 11.5 −4 − mV MHz MHz dBV dB Secondary ch.

Features

• Demodulation of main audio signal using wide band PLL (lock range selectable)
• Demodulation of secondary audio signals using wide band PLL
• HF input selection: two-out-of-eight secondary audio signals can be selected
• Noise reduction of the secondary audio signals
• Output selection: stereo, language 1, language 2, main audio and external
• Mute control
• Line outputs (SCART level). QUICK REFERENCE DATA SYMBOL Supply VP Main channel VIN3(rms) ∆fOM input sensitivity pin 18 (14) (RMS value) lock range PLL demodulator either or VOM S/N(A) output voltage pin 23 (19) signal-to-noise ratio A-we.