What this MEMS oscillator delivers for your timing rail
The DSC6001HI2A-027.0000T is a 27 MHz XO (Standard) from Microchip's DSC60XX series, built around a MEMS resonator rather than a quartz crystal — this gives it better shock and vibration immunity than a conventional crystal oscillator, and the startup time is typically under 5 ms, which matters in automotive modules that cycle power frequently. Output is CMOS, which directly drives the clock input of most MCUs, FPGAs, and SoCs without a level translator. The supply voltage spans 1.71 V to 3.63 V, covering 1.8 V, 2.5 V, and 3.3 V logic rails without an external regulator.
AEC-Q100 qualification and deployment context
The 4-SMD, no-lead package measures 1.60 mm x 1.20 mm with a seated height of 0.89 mm max — this is a 1612 footprint that fits tight layouts in ADAS cameras, infotainment head units, or telematics modules. Surface-mount reflow follows standard JEDEC profiles.
Microchip lists the DSC6001HI2A-027.0000T as Obsolete. Existing BOM lines with this order code require a last-time-buy or a qualified replacement. The DSC60XX series includes many active 27 MHz variants with the same MEMS core, CMOS output, and AEC-Q100 rating — but the specific order code suffix (HI2A, indicating package size, stability, and temperature grade) may differ. A direct pin-compatible replacement from the same series is possible; the datasheet cross-reference table should be consulted for the exact active order code that matches the 1.60 mm x 1.20 mm package, ±25 ppm, and -40°C to 85°C range.
Because the part is obsolete, it is not stocked in volume by franchised distributors. The MEMS oscillator market is dominated by Microchip (through its SiTime acquisition) and a few others, but a pin-compatible alternative would require a board-spin to a different package or vendor unless a same-series active variant is chosen.