Obsolete MEMS XO — 18.432 MHz, AEC-Q100, Last-Time-Buy Window Closed
Microchip's DSC6001HE2A-018.4320 is an XO (Standard) oscillator built on a MEMS resonator, delivering a fixed 18.432 MHz CMOS output with ±25 ppm frequency stability across a 1.71V to 3.63V supply range.
Sourcing Reality — Obsolete, No Official Successor on Record
The 4-SMD, No Lead package (1.60mm x 1.20mm footprint, 0.89mm seated height) is common across the DSC60XX family — a cross-reference to a different frequency or stability grade within the same series may share the same layout, but no direct substitute is confirmed.
Automotive-Grade Timing — What AEC-Q100 Means Here
AEC-Q100 qualification means the part passed automotive-grade stress tests (temperature cycling, ESD, latch-up) and is rated for the -20°C to 70°C operating range — suitable for cabin or infotainment applications, but not the full -40°C to 125°C under-hood band.