PLL-based clock generator with 1:6 fanout
The Cypress CY2292FXC is a clock generator and fanout distribution IC in a 16-SOIC package. It integrates a PLL (phase-locked loop) to synthesize and distribute up to six clock outputs from a single input source — either a crystal or an external clock. The part accepts a 3.3V or 5V supply, making it straightforward to drop into mixed-voltage digital boards where the core logic runs at 3.3V but legacy peripherals still need a 5V-referenced clock rail. The maximum output frequencies are 66.6 MHz on one output and 90 MHz on another, which covers common microcontroller bus clocks, USB frame rates, and Ethernet PHY reference frequencies. All outputs are CMOS-level, so no external termination or level translation is needed when driving standard logic inputs.
66.6 MHz and 90 MHz — what the dual max rating means
The datasheet lists two distinct frequency maximums: 66.6 MHz and 90 MHz. This typically means the PLL has two output dividers or two independent VCO paths — one optimized for the lower frequency band and one for the higher band.
The CY2292FXC comes in a 16-pin SOIC with 3.90 mm body width (the narrow SOIC-16, not the wide 7.5 mm version).