Audio Amplifier
SIP13 +------+ ++ 13| IP2 | 12| NC | 11| M/SS | 10| VP2 | 9| OUT2B | 8| GND2 | 7| OUT2A | 6| OUT1B | 5| GND1 | 4| OUT1A | 3| VP1 | 2| GND ++ 1| IP1 +------+
No frequency to check
TDA1552 Datasheet