Active MEMS oscillator at 125 MHz with LVDS output
The DSC1103BI2-125.0000: Its 2.25V to 3.63V supply range lets it run directly from a 2.5V or 3.3V rail without an intermediate regulator, simplifying the power tree.
The 6-SMD no-lead package (5.00 mm x 3.20 mm, 0.90 mm seated height) is a standard footprint for MEMS oscillators; the surface-mount reflow profile matches JEDEC MSL-1 typical for this class.
The DSC1103 series is the base product number; the suffix BI2-125.0000 encodes the stability grade, temperature range, and frequency.