TDA6048-5X

Multistandard sound IF with two selectable IF inputs. The selection TDA6048-5X between the two IF inputs is made by applying ground to a special IF-select pin, or by leaving it in a high impedance state. Both IF inputs are symmetrical inputs. There are two possible ways of processing the select sound IF:
     An audio frequency signal of TDA6048-5X is available after amplifying and demodulating a selected AM sound
     IF signal (e.g. L standard).
     For applications with quasi parallel sound a selected FM-sound IF is mixed with a picture
     carrier which is applied symmetrically to a picture carrier input stage (e.g. B/G standard).
     The difference of both, picture carrier and FM-sound IF, is available for further processing.
A three-level switch TDA6048-5X defines the activating of the AM- and/or FM-signal path. So, three modes of operating are possible:
                        AM sound                                      difference frequency
                             ON                                                        OFF
                            OFF                                                        ON
                             ON                                                         ON