The DSC1001BI1-125.0000T: AEC-Q100 qualification means it meets automotive-grade reliability stress and PPAP requirements — suitable for under-hood or chassis-domain ECUs where a quartz crystal might drift under vibration or thermal shock.
Supply flexibility and package fit
Operating from 1.8V to 3.3V, this oscillator can serve as a single clock source across mixed-voltage domains — a 1.8V FPGA bank and a 3.3V PHY can share the same part without a level translator. Housed in a 5.00mm x 3.20mm 4-SMD no-lead package with a seated height of 0.90mm, it fits standard oscillator footprints and reflow profiles; the 0.197" x 0.126" land pattern matches many 5x3.2mm XO pads. Maximum supply current is 8.7mA at 125 MHz — a reasonable draw for a high-speed clock, but check the load capacitance on the CMOS output to ensure the rise time stays within the receiver's input threshold window.
No official second-source or pin-compatible replacement listed; the DSC1001 series is the primary reference.