557G-05ALF Datasheet | Renesas

QUAD DIFFERENTIAL PCI-EXPRESS GEN1 CLOCK SOURCE ICS557-05A Description Features The ICS557-05A is a spread-spectrum clock generator that supports PCI-Express requirements. It is used in PC or embedded systems to substantially reduce electro-magnetic interference (EMI). The device provides four differential HCSL or LVDS high-frequency outputs with spread spectrum capability. The output frequency and spread type are selectable using external pins. Block Diagram - Packaged in 20-pin TSSOP - Ro HS 5 (green) or Ro HS 6 (green and lead free) plaint package - Supports PCI-Express applications - Four differential spread spectrum clock outputs - Spread spectrum for EMI reduction - Uses external 25 MHz clock or crystal input - Power down pin turns off chip - OE control tri-states outputs - Spread and frequency selection via external pins - Spread Bypass option available - Industrial temperature range available - For PCIe Gen2 applications, see the 5V41066 - For PCIe Gen3 applications, see the 5V41236 VDD 2 3 SEL[2:0] X1 25 MHz crystal or clock X2 Optional tuning crystal capacitors Spread Spectrum/ Output clock selection Clock Oscillator Spread Spectrum Circuitry PLL Clock Synthesis 2...