4.8 GHz clock distribution in a 24-LFCSP footprint
The ADCLK946BCPZ is a 1:6 fanout buffer from Analog Devices' SiGe series, rated for a maximum frequency of 4.8 GHz. It accepts CML, CMOS, LVDS, or LVPECL inputs and delivers LVPECL outputs — so the same buffer can sit behind a PLL output or a crystal oscillator without needing a translator.
Supply range and signal compatibility
Supply voltage range is 2.97 V to 3.63 V, which aligns with a 3.3 V rail ±10 %. The differential input and output path means the buffer rejects common-mode noise on the clock trace — important when the source and load are on different boards connected by a cable. Compared to the ADCLK948BCPZ (2:8 fanout/mux) or ADCLK950BCPZ (2:10), this 1:6 part is the simpler fanout-only choice when you do not need input selection.
Layout and thermal considerations
The 24-VFQFN exposed-pad CSP requires a solder-paste stencil opening that covers at least 50 % of the pad area to avoid voids. The exposed paddle is the primary thermal path — connect it to a solid ground plane with at least four thermal vias under the pad. The 4.8 GHz bandwidth supports 10-GbE reference clocks and ADC sampling clocks without edge degradation.