Quad-output MEMS oscillator for multi-rail clock trees
The DSC400-3333Q0099KI1T is a MEMS-based XO (standard) that delivers four independent output frequencies from a single 20-VFQFN package — 148.35MHz, 148.5MHz, 156.25MHz, 208.333333MHz, 197.8MHz, and 198MHz are spread across the four outputs, covering common video, Ethernet, and FPGA reference clock rates. LVDS output signaling keeps the differential swing tight (350 mV typical into 100 Ω), which reduces radiated EMI compared to single-ended LVCMOS at these frequencies — a practical advantage for dense PCB layouts with multiple clock domains.
Operates from 2.25V to 3.6V, so it runs directly off a 2.5V or 3.3V rail without an intermediate LDO — the Enable/Disable function lets the system power down the oscillator when the clock domain is idle.
Housed in a 20-VFQFN with exposed pad (5.00mm x 3.20mm, 0.90mm height), the thermal pad must be soldered to a PCB ground plane with thermal vias to dissipate heat — the MEMS resonator itself draws minimal current, but the LVDS output stage benefits from a low-inductance ground return.