MEMS oscillator with wide supply and temperature range
The DSC1201BA3-40M00000T is an active-production XO (Standard) from Microchip's DSC12X1 series, built on a MEMS resonator rather than a quartz crystal — the CMOS output swings rail-to-rail at 40 MHz, and the supply range of 2.25 V to 3.63 V covers 2.5 V and 3.3 V logic rails without a separate regulator.
Active draw is 27 mA typical at 40 MHz, which is the current into the output buffer driving a CMOS load; the MEMS core itself draws far less.
Housed in a 6-VDFN measuring 5.00 mm × 3.20 mm with a seated height of 0.90 mm — the 0.197" × 0.126" footprint matches industry-standard 5×3.2 mm oscillator pads, so it drops onto existing layouts without a board spin.