What this quad-output MEMS XO replaces on the BOM
The DSC400-4244Q0023KE1 delivers four independent clock outputs from a single 20-VFQFN package: two at 100 MHz and two at 156.25 MHz. That replaces up to four discrete oscillators, collapsing the BOM line count and the board area they occupy. Its MEMS resonator base means the part handles the shock and vibration profile of a deployed switch or base station better than a quartz can — no start-up reliability surprises after the board ships.
Supply rail and output logic — what fits where
Supply range spans 2.25 V to 3.6 V, so a standard 3.3 V or 2.5 V rail works without an extra regulator. The outputs are HCSL or LVPECL — both common for PCIe reference clocks and high-speed SerDes. Confirm the receiver's termination scheme; HCSL needs no AC-coupling, LVPECL typically does.
Temperature range and package — board-fit constraints
Not for outdoor enclosures or engine bays without active thermal management. The 20-VFQFN with exposed pad measures 5.00 mm × 3.20 mm, 0.90 mm tall.
Status is Active — no EOL notice, no last-time-buy window. This part can be designed into a new BOM today and sourced through standard distribution. No official second-source or pin-compatible drop-in from another manufacturer is recorded; the DSC400 series is Microchip-specific.