The DSC1121NI1-133.3300 is a MEMS-based XO (Standard) oscillator delivering a 133.33 MHz CMOS output — a common reference frequency for Gigabit Ethernet PHYs, PCIe Gen1/2, and automotive SerDes links. The 2.25V to 3.6V supply rail tolerance means it can run from a 2.5V or 3.3V rail without an intermediate regulator — one less component on the BOM.
AEC-Q100 qualification and deployment context
This qualifies it for under-hood or chassis-domain ECUs where the ambient temperature can reach 85°C and the board sees vibration from the engine or road surface.
Enable/Disable function and power budgeting
With the output disabled, the supply current drops from 35 mA typical to 22 mA maximum — a useful power save in battery-backed or thermal-constrained designs where the clock tree can be gated during sleep modes.