Clock generator at 166 MHz — what it does on your board
The Cypress CY25422SXI is a clock generator IC producing a 166 MHz output, designed to provide a stable reference clock for digital logic, FPGAs, or communication interfaces. It's a straightforward part: one frequency, no PLL configuration or divider programming needed on the board — the output is fixed at 166 MHz. That makes it a drop-in clock source for systems that need that specific frequency without external tuning components.
Lifecycle and sourcing — active, no obsolescence concern
The CY25422SXI carries an Active lifecycle status, meaning Cypress (now Infineon) continues to manufacture and support this part. There is no last-time-buy window, no NRND flag, and no announced end-of-life.
What the 166 MHz rating means for fit
The 166 MHz output is the part's single defining spec. It's not a range or a programmable frequency — the chip delivers exactly that. If your system's clock tree calls for 166 MHz (common in some Ethernet PHY reference clocks, DDR memory interfaces, or high-speed serial links), this part fits without a divider or multiplier. If you need a different frequency, you'd look at a programmable clock generator or a PLL-based part like the CY2305SXI-1HT, which runs at 133.33 MHz but is a different topology (zero-delay buffer with 1:5 fanout).