41.5 MHz MEMS clock — why the resonator type matters for your BOM
The DSC1121AE5-041.5000T is a 41.5 MHz XO (Standard) oscillator built on a MEMS resonator rather than a quartz crystal — the MEMS structure gives it better immunity to shock and vibration than a quartz-based can, and the supply range spans 2.25V to 3.6V so it runs off a single 2.5V or 3.3V rail without an extra regulator.
Active lifecycle — no last-time-buy pressure on this line item
The MEMS resonator fabrication means lead times tend to be shorter than quartz equivalents because the die is sourced from a standard CMOS fab flow, not a quartz crystal lot — a sourcing advantage when the BOM calls for a tight ±10 ppm window.
Surface-mount footprint and temperature range
Housed in a 6-VDFN exposed pad package measuring 7.00 mm x 5.00 mm with a seated height of 0.90 mm, the DSC1121AE5-041.5000T fits the standard 7x5 mm oscillator footprint — the exposed pad needs a thermal via pattern under the package to pull heat from the MEMS die into the board copper.