Dual LVPECL clock source for networking line cards
The DSC400-0202Q0109KE2T is a MEMS-based XO that delivers two independent LVPECL outputs at 153.6 MHz and 176.875 MHz from a single 20-VFQFN package. The 2.25V–3.6V supply range lets it run from a common 2.5V or 3.3V rail without an extra regulator. Frequency stability is ±25 ppm across the -20°C to +70°C commercial range — tight enough for 10GbE reference clocks and CPRI line timing where a ±50 ppm oscillator would eat into the link budget.
Package and layout constraints
The 20-VFQFN exposed-pad package measures 5.00 mm x 3.20 mm with a seated height of 0.90 mm.