What this clock conditioner does on the board
The LMK03001DISQX/NOPB is a clock conditioner — it cleans up jitter on a reference clock and fans it out to eight destinations. Unlike a PLL-based synthesizer, it has no internal phase-locked loop (PLL = No per the spec), so it's a pure jitter-cleaning and distribution path, not a frequency multiplier. It handles input signals in LVCMOS, LVDS, or LVPECL formats and outputs in LVDS or LVPECL, making it flexible for interfacing with FPGAs, SerDes transceivers, or high-speed ADCs that need a clean differential clock. The single 1.57 GHz maximum frequency covers most high-speed serial links (10GbE, PCIe Gen3, SATA) and RF sampling converters that run off a sub-1.6 GHz reference.
Package, supply, and temperature — what matters for a design-in
It lives in a 48-lead WFQFN with an exposed pad (7x7 mm body). That pad needs a thermal via array and a solid ground pour to pull heat out — the datasheet's recommended land pattern is worth following closely. The supply rail is tight: 3.15 V to 3.45 V. A local LDO or a low-noise 3.3 V supply with good regulation is the safe call. It's happy in a base-station cabinet, a test-equipment chassis, or an outdoor enclosure that sees sun load, but not under-hood automotive (that would need AEC-Q100).
Sourcing and lifecycle — active, no end-of-life concern
It's a current-production part that can be ordered through authorized distribution channels. The base product number is LMK03001, so any PCN or datasheet revision will carry that prefix. The /NOPB suffix indicates lead-free / RoHS-compliant plating (no Pb in the solder balls or finish).