PLL-based clock distribution in a 28-pin SSOP
The CY23FP12OC is a PLL-based zero delay buffer from Cypress, designed to regenerate a clean clock output with deterministic phase alignment relative to the input. It accepts a single LVCMOS or LVTTL reference and distributes it across 12 LVCMOS outputs, all phase-locked to the incoming edge. The internal PLL multiplies the reference to generate the output frequency, but the divider path is not engaged — the ratio is set by the PLL feedback path, not an external divider. Maximum output frequency is 200 MHz, which covers most common system clocks for Ethernet PHYs, FPGAs, and SoC reference inputs. Supply voltage covers 2.375 V to 2.625 V and 3.135 V to 3.465 V. Packaged in a 28-SSOP with 0.209-inch body width and 5.30 mm height, surface-mount only. The 28-pin count is driven by the 12 outputs plus power, ground, and feedback paths — not a dense package, but the pin pitch is fine enough that hand rework requires care.
What the 2:12 ratio and 200 MHz ceiling mean for your clock tree
The 2:12 input-to-output ratio means two input pins feed a single PLL that drives 12 identical LVCMOS outputs. The 200 MHz maximum frequency is the upper bound for the output. Differential inputs and outputs are not supported — all I/O are single-ended LVCMOS. The zero-delay characteristic means the output edges align to the input edge within the PLL's lock range, which is useful for source-synchronous interfaces where the clock and data must maintain a fixed phase relationship across the board.
Active lifecycle, but watch the RoHS status
That means no last-time-buy pressure and no forced redesign for obsolescence. However, the RoHS compliance status is listed as non-compliant. This part contains lead in the solder finish or internal construction, which excludes it from builds destined for RoHS-enforced markets (EU, California, etc.) unless a specific exemption applies. If your BOM requires full RoHS compliance, you will need a different order code or a lead-free equivalent, though no direct RoHS-compliant alternate is listed in this record.
Sourcing posture: quoted to order
Given the Active status, lead times are generally stable, but the RoHS restriction may narrow the pool of available inventory, so early engagement is advisable for production volumes.