What this MEMS oscillator brings to a board
The DSC8101BI2T: It is a blank programmable part — you program the frequency into the device before assembly, which means one BOM line can serve multiple frequency variants if you stock the blank part and program at the board level.
Active production and sourcing reality
It is part of the DSC8101 series of MEMS oscillators from Microchip Technology, which share the same package and pinout across the frequency range — a single PCB layout works for any programmed frequency in the family.