125 MHz LVPECL clock from a MEMS resonator
The DSC1122CE1-125.0000 is a standard XO built around a MEMS resonator, not a quartz crystal. It delivers a 125 MHz LVPECL output — a differential signal that rejects common-mode noise and drives long PCB traces or 50-Ω terminated lines cleanly. Supply voltage spans 2.25V to 3.6V, so it runs from a 2.5V or 3.3V rail without an extra regulator.
Sourcing and design-in posture
Lifecycle status is Active — Microchip continues to produce this part, and it is suitable for new designs. The 6-SMD no-lead package measures 3.20 mm x 2.50 mm with a seated height of 0.90 mm. Standard reflow profiles for lead-free solder work; the MEMS die is less sensitive to board flex than a quartz crystal, but keep the ground pad under the package solid for thermal and signal integrity.
Temperature grade and deployment fit
It fits networking switches, base stations, test equipment, and embedded processors that live in a controlled environment. Not rated for -40°C automotive or outdoor telecom; if the ambient drops below -20°C, look at the wider-temperature DSC1122 variants. For applications needing ±25 ppm or better, the DSC1122 family includes tighter grades; check the base product number suffix.