MEMS oscillator with LVPECL output
The DSC1122CI5-048.0020 is a MEMS-based XO (Standard) from Microchip's DSC1122 series, delivering a 48.002 MHz LVPECL clock output. The MEMS resonator replaces a quartz crystal, giving better shock and vibration tolerance — useful if the board sees a drop test or lives near a motor drive. Supply voltage spans 2.25V to 3.6V, so it runs off a 2.5V or 3.3V rail without a separate regulator. The Enable/Disable function lets you gate the output for power savings in multi-clock systems.
Frequency stability and temperature grade
Rated ±10 ppm frequency stability over the full -40 to 85°C industrial range. That is tight enough for a 1 GbE SerDes reference or a FPGA transceiver clock without additional PLL cleanup. Maximum supply current is 58 mA when enabled, dropping to 22 mA in disable mode — the disable current is low enough to leave the oscillator powered on a shared rail without a load switch.
Housed in a 6-SMD, no-lead package measuring 3.20 mm x 2.50 mm with a seated height of 0.90 mm. The 0.50 mm pitch pads are standard for this footprint class — a two-layer board handles the fan-out, but keep the output trace short to preserve LVPECL edge rates.