AEC-Q100 grade — the gate for automotive clock trees
Rated AEC-Q100, this DSC1121AL2-025.0000T carries the qualification documentation an OEM auditor expects for a production clock source.
MEMS resonator vs quartz — the reliability delta
The MEMS base resonator replaces a quartz blank and its start-up sensitivity. For a 25 MHz CMOS clock on a 2.25 V to 3.6 V rail, the MEMS structure handles shock and vibration better than a quartz tuning-fork — relevant in an engine-bay or industrial motor-drive environment where quartz crystals can fracture under repetitive 50 g impacts.
Listed as Active by Microchip. Sourced to order against the BOM — the 6-SMD no-lead exposed-pad package (7.00 mm × 5.00 mm) is current production, so no last-time-buy scramble.
Package and footprint constraints
6-SMD, no-lead exposed pad (0.276" × 0.197", 0.90 mm seated height). The exposed pad requires a thermal-land pattern on the PCB — not for heat dissipation (35 mA supply max) but for mechanical stability under vibration.