MEMS oscillator for SerDes reference clocks
The DSC1104DI5-147.4560 is a MEMS-based XO (Standard) from Microchip's DSC1104 series, delivering a fixed 147.456 MHz output in HCSL logic levels — the signalling standard for PCIe, SATA, and Ethernet reference clocks that require a differential pair with controlled swing.
The supply voltage range spans 2.25 V to 3.6 V, covering common 2.5 V and 3.3 V rails without an external LDO — the oscillator draws 42 mA max when active. A Standby (Power Down) function reduces current draw to 95 µA max, letting a system-level enable signal gate the clock tree for low-power sleep modes.
Package and board layout notes
Housed in a 6-SMD, No Lead package measuring 2.50 mm × 2.00 mm with a seated height of 0.90 mm — a compact footprint that fits under a mezzanine card or alongside a BGA edge without crowding the fan-out vias.