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1 Multimedia ICs Audio / video switch for CANAL - Plus decoder BH7634AS The BH7634AS is one-chip IC that contains audio and video switches that support 21-pin SECAM and PAL connec- tors. The I 2 C BUS for switch control simplifies applications, while the two expansion ports allow up to two external inputs. • Applications VCRs • Features 1) I 2 C BUS control. 2) Video input is sync tip clamped, and includes a small-capacity (0.022μF) input capacitor. 3) Three FSCOUT values. 4) Two expansion ports. 5) Audio mute function. 6) 75Ωdriver output (pins 20 and 23) requires no attached capacitor. • Absolute maximum ratings (Ta = 25°C) Power supply voltage Power dissipation Operating temperature Storage temperature ∗ Reduce by 12mW for each increase in Ta of 1°C over 25°C. ParameterSymbolLimitsUnit V CC13.5V Pd 1200 mW Topr– 25 ~ + 60°C Tstg– 55 ~ + 125°C • Recommended operating conditions (Ta = 25°C) Parameter V CC8.513V12 SymbolMin.Typ.Max.Unit Operating power supply voltage