AEC-Q100 grade and operating range
The DSC1001CL1-022.5790T: Rated AEC-Q100, this oscillator is qualified for automotive temperature Grade 1 (–40°C to +105°C). That puts it in the under-hood or cabin-ambient band where a quartz oscillator would drift past the ±50 ppm window under thermal shock. The MEMS resonator handles 50,000 g shock and 70 g vibration typical — no startup settling time, no activity dips.
22.579 MHz output – audio and serial clock
22.579 MHz is the standard audio master clock for 44.1 kHz sample rates (×512). It also drives USB full-speed (12 MHz × 1.88) and some CAN-FD controllers. The CMOS output swings rail-to-rail across the full 1.8V–3.3V supply range, so the same oscillator can feed a 1.8V MCU and a 3.3V PHY without a level translator.
MEMS construction – why it matters for the BOM
That means no frequency shift from board flex or reflow profile, no microphonic sensitivity, and no start-up delay. It also eliminates the external load capacitors a quartz crystal needs — one fewer component per clock tree.
Package and assembly fit
3.20 mm × 2.50 mm × 0.90 mm 4-SMD no-lead package — same footprint as a standard 3225 quartz oscillator. The MEMS die inside is epoxy-bonded, so no cavity or hermetic seal to crack.
Active product status — no last-time-buy window, no successor. The DSC1001 series is Microchip's mainstream automotive MEMS oscillator family, so second-source risk is low.