View ba7630s datasheet:

Video ICs Video switch for CANAL-Plus decoder BA7630S / BA7630F The BA7630S and BA7630F are decoder switching ICs for the scrambled broadcasts in France. The ICs include a 3- input multiplexer, 2-input multiplexers with 6dB amplifiers, and a 9-bit serial-to-parallel converter. These ICs greatly simplify decoder switching, and can be connected to a control microprocessor using just two lines. Applications • Video cassette recorders Features • 1) All the switching functions required for SECAM 3) Inputs have a sync-tip clamp. CANAL plus decoder integrated onto one chip. 4) The switch section can be used independently. 2) Built-in 9-bit serial-to-parallel converter for decoder 5) Low power consumption off a 5V supply. and TV control reduces number of microprocessor wiring connec