PLL frequency synthesizer in a compact 20-TSSOP
The CYW2330ZI is a PLL frequency synthesizer from Cypress Semiconductor, designed for clock generation and frequency synthesis in systems that need a clean, programmable clock from a reference input. It operates from a 2.7V to 5.5V supply, making it compatible with both 3.3V and 5V logic rails commonly found in industrial control, telecom infrastructure, and test equipment. The device accepts up to three input references and provides three clock outputs, with a differential input stage that rejects common-mode noise on the reference — useful when the clock source comes over a twisted pair or long trace. Outputs are single-ended, so the board layout stays simple with standard CMOS fan-out.
3:3 input-to-output ratio — routing flexibility
With a 3:3 input-to-output ratio, the CYW2330ZI can accept three independent reference clocks and distribute three synthesized outputs. This is useful in multi-card backplane systems where one board needs to clean up a recovered clock, a local oscillator, and a system reference, then fan out three copies to downstream logic. The differential input stage (Yes/No for differential input vs single-ended output) means the reference can be a low-swing differential pair (e.g., LVDS or LVPECL) while the outputs drive standard CMOS loads — no level translation needed on the output side.
Lifecycle and sourcing reality
It is RoHS non-compliant, so verify your assembly house's exemption policy for lead-bearing finishes — this part may require a waiver for certain RoHS-regulated markets. The package is 20-TSSOP (4.40 mm width), a common footprint that is widely supported in assembly.