What this clock generator does on the board
The Cypress CY28322ZC-2 is a clock generator that combines a PLL (with bypass option), clock synthesis, and spread-spectrum clock generation in one 48-TSSOP package. It takes a single clock or LVTTL input and distributes it to 21 clock outputs — a 1:21 fanout ratio that saves board space versus cascading multiple lower-output buffers. The PLL can be bypassed for test or low-jitter pass-through modes. Maximum output frequency is 14.318 MHz, typical for legacy PC chipset reference clocks, SDRAM controllers, and PCI bus timing.
Supply range and temperature grade — where it fits
Supply voltage is 2.85 V to 3.465 V. Operating temperature is 0°C to 70°C — commercial grade.
Lifecycle and compliance
RoHS non-compliant, so if your BOM requires lead-free assembly, this part needs an exemption or a leaded process. No official second-source or successor is listed in the Cypress portfolio for this exact order code.