5X7 48M 3.3V 5X7 48M OSC 5X7 4M OSC 5X7 50M 3.3V 20PPM 5X7 50M OSC 5X7 54M 3.3V 20PPM 5X7 55M OSC 5x7 6.7458M OS 5X7 60.000MHZ 5X7 60M OSC