156.25 MHz LVPECL reference for SERDES and converter clocks
The DSC1122CI5-156.2500 delivers a 156.25 MHz LVPECL differential output from a MEMS resonator, a frequency that aligns with the standard reference clock for 10 Gigabit Ethernet and Fibre Channel SERDES PLLs. Supply voltage tolerance spans 2.25 V to 3.6 V, covering both 2.5 V and 3.3 V logic rails directly — no separate regulator needed for the oscillator supply. The 6-SMD no-lead package (3.20 mm x 2.50 mm footprint) suits dense PCB layouts where a quartz crystal plus oscillator IC would consume more board area.
MEMS resonator advantage over quartz
MEMS oscillators typically offer better shock and vibration immunity, which matters in outdoor telecom or industrial equipment where board-level vibration can pull a quartz crystal's frequency outside the ±10 ppm window.