312.5 MHz LVPECL MEMS oscillator — what the ratings mean
The DSC1122AE1-312.5000T is a Microchip MEMS-based XO (Standard) delivering a 312.5 MHz LVPECL output from a 2.25V to 3.6V supply rail. The LVPECL signalling at this frequency is typical for high-speed SerDes, FPGA reference clocks, and 10G Ethernet PHY applications where edge jitter and rise-time symmetry matter. The 58 mA maximum supply current is the worst-case draw at full load; in a typical 3.3 V application the actual current is lower, but the 58 mA figure is what you budget for the power rail.
Active lifecycle — sourcing for production
The 6-SMD, No Lead Exposed Pad package measures 7.00 mm x 5.00 mm with a seated height of 0.90 mm. The 0.50 mm pad pitch is standard for this footprint; a 2-layer board handles the fan-out without trouble.