Integrated Device Technology 2 Output PCI-Express GEN1 Clock Source 557GI-03LF

The 557-03 is a spread spectrum clock generator that supports PCI -Express Gen 1 and Ethernet requirements. The device is used for PC or embedded systems to substantially reduce electromagnetic interference ( EMI ). The device provides two differential ( HCSL ) spread spectrum outputs. The spread type and amount are configured via select pin. Using IDT 's patented Phase-Locked Loop ( PLL ) techniques, the device takes a 25 MHz crystal input and produces two pairs of differential outputs at 25 MHz, 100 MHz, 125 MHz or 200 MHz clock frequencies for HCSL , and 25 MHz or 100 MHz for LVDS .