The 5055 clock oscillator IC offer very low power consumption (typical <1.2mA @ 40 MHz) and operating frequency range 20-40 MHz with multi-stage divider versions that extend frequency down to 5 MHz Built in oscillator regulator circuit, targeted low crystal drive current, and ultra stability over power supply range <<1ppm and 1 kHz offset phase noise of -135 dBc/Hz. Operating temperature range is -40°C to 85°C