PLL-based zero delay buffer for single-ended clock trees
The Cypress CY2305SXC-1 is a PLL-based zero delay buffer that takes one single-ended clock input and distributes it to five outputs with near-zero propagation delay. It operates from a 3V to 3.6V supply and supports clock frequencies up to 133.33 MHz.
1:5 fanout and supply tolerance
The 1:5 input-to-output ratio means a single reference clock drives five loads, which simplifies the clock tree layout and reduces the number of buffers needed. The 3V to 3.6V supply range aligns with standard 3.3V logic families; the 0.3V tolerance on the low side gives some headroom for rail droop under load. Because the outputs are single-ended (no differential signaling), the board designer must keep trace lengths matched and impedance-controlled to minimize skew between the five copies.