What this PLL clock buffer does for a DDR board
The CY28341OC-2 is a PLL-based clock buffer from Cypress, built to take a single crystal input and fan it out to 20 clock outputs at up to 200 MHz. It is aimed squarely at DDR memory clock trees — the 1:20 ratio means one crystal reference can feed the whole DIMM slot array without daisy-chaining a second buffer. Outputs are differential (No/Yes on the input/output side), which is what DDR interfaces expect for clean edge rates and low jitter on the rising edge.
Temperature range and where it fits
Rated 0°C to 70°C, this is a commercial-temperature part. It belongs in a desktop motherboard, a server blade, or a telecom line card in a conditioned room — not in an engine bay, a rooftop enclosure, or a factory floor without climate control. If your BOM calls for industrial temp, this is not the part.
Package and mounting
56-pin SSOP, 7.50 mm body width, surface-mount. The 0.295-inch-wide footprint is standard for this density. Orientation is marked by pin 1 chamfer on the package — no ambiguity on a pick-and-place line or a rework station. No special handling beyond normal ESD precautions.
Lifecycle and sourcing reality
Listed as Active in production. It is RoHS non-compliant.