Microchip's DSC1003CI5-087.5000 is a standard XO (Standard) MEMS oscillator delivering a fixed 87.5 MHz CMOS output — no PLL jitter, no external load cap tuning. That means the clock edge stays within 875 Hz of 87.5 MHz regardless of whether the rail dips during a cold crank or the ambient hits 85°C under the dashboard. The 4-SMD no-lead package (3.20mm x 2.50mm) fits the same footprint as quartz oscillators, so a board designed for a quartz can is a direct drop-in.
Standby power gating and supply flexibility
For an ECU that spends most of its life in sleep, this microamp-level draw keeps the quiescent load off the battery. Active supply current is 9.6 mA max at 87.5 MHz, which is typical for a MEMS oscillator at this frequency and well within the budget of a 3.3V or 2.5V rail. The 1.7V-3.6V input range means the same part works on a 1.8V core supply or a 3.3V I/O bank without a separate level translator.
Active production — quoted per BOM quantity
The base product number DSC1003 covers the family; the full suffix CI5-087.5000 locks the frequency, stability grade, and temperature range.