The DSC1101DI5-049.1520T is a MEMS-based XO (Standard) from Microchip's DSC1101 series, delivering a 49.152 MHz CMOS output with a standby (power down) function that drops supply current to 95 µA max when disabled. The ±10 ppm absolute pull range (APR) allows fine frequency margining, useful for adjusting clock edges in high-speed serial links or spread-spectrum clocking schemes. Operating from 2.25V to 3.6V, it mates directly with 2.5V or 3.3V logic rails without an external level shifter.
The MEMS resonator construction avoids the long lead times and supply constraints sometimes associated with quartz crystal oscillators.