What this clock generator does on the board
The CY241V08ASC-05 is a single-output clock generator from Cypress that combines a PLL and a voltage-controlled crystal oscillator (VCXO) in an 8-pin SOIC. It takes a crystal input and produces a clean CMOS-level clock output up to 27 MHz, with the VCXO allowing fine frequency adjustment via an external control voltage. The 3.3 V supply (3.135 V to 3.465 V) and commercial temperature range (0°C to 70°C) target it squarely at indoor equipment — think set-top boxes, network switches, or test instruments that need a tunable reference without a separate VCXO module.
The integrated PLL multiplies the crystal frequency up to the 27 MHz ceiling, so you can use a lower-cost fundamental crystal and still hit a higher output frequency. The VCXO function lets you pull the output frequency by varying a control voltage — useful for cleaning up jitter in a clock-recovery loop or for frequency margining during production test. Because the part is a single-circuit, 1:1 input-to-output ratio device, it is a point solution for one clock domain, not a fanout buffer.
Package and supply — what to check before layout
Housed in an 8-SOIC (3.90 mm width), the footprint is standard and rework-friendly — no thermal pad, no hidden vias. The supply tolerance is tight: 3.135 V to 3.465 V means a 3.3 V rail with ±5 % regulation is fine, but a 2.5 V or 5 V logic rail will not work without a regulator.
Note the RoHS non-compliant flag — this part uses lead-bearing solder terminations, which may affect EU RoHS exemption eligibility or require a waiver for new designs.