The AD9545BCPZ-REEL7 is a dual-PLL clock synchronizer from Analog Devices, designed to clean up jitter and generate multiple synchronized output clocks from a single reference. It accepts differential or single-ended inputs and delivers CML, HCSL, LVDS, or single-ended outputs — covering the common signalling standards in telecom and data-converter clock trees. With a maximum output frequency of 2.4 GHz, this part handles the high-speed serial interfaces found in base stations, network timing, and ADC/DAC clocking. The 2:6 input-to-output ratio gives you six independent clock outputs from two reference inputs, which is useful for distributing a clean clock to multiple destinations on the board.
Key ratings that drive the BOM decision
Supply voltage spans 1.71V to 3.465V, which lets you run it from a common 1.8V or 3.3V rail without a dedicated regulator. That wide range also means it can interface directly with 1.8V logic on one side and 3.3V logic on the other — no level translation needed for the clock lines.
Package and footprint notes for the layout engineer
The 48-LFCSP (7x7 mm) package has an exposed pad on the bottom — the datasheet recommends a thermal via array under the pad to conduct heat into the ground plane. The pad is electrically connected to ground, so the via pattern also serves as a low-inductance return path for the high-frequency outputs. Surface-mount only; no socket option for field swapping.