PI6C557-03

PI6C557-03 PCI Express Clock Product Features LVDS compatible outputs Supply voltage of 3.3V ±10% 25MHz input frequency HCSL outputs, 0.7V Current mode differential pair Jitter 60ps cycle-to-cycle (typ) www.DataSheet4U.com Spread of ±0.25%, -0.5%, -0.75%, and no spread Industrial temperature range Packaging: (Pb-free and Green) —16-pin, 173 mils wide TSSOP Description The PI6C557-03 is a spread spectrum clock generator supporting PCI Express and Ethernet requirements. The device is used for PC or embedded systems to substantially reduce Electromagnetic Interference (EMI). The PI6C557-03 provides two differential (HCSL) spread spectrum outputs. The PI6C557-03 is con figured to select spread and clock selection. Using Pericom's patented Phase-Locked Loop (PLL) techniques, the device takes a 25MHz crystal input and produces two pairs of differential outputs (HCSL) at 25MHz, 100MHz, 125MHz and 200MHz clock frequencies. It also provides spread selection of ±0.25%, -0.5%, -0.75%, and no spread. Block Diagram VDD 2 SS1:SS0 2 CLK0 Control Logic Phase Lock Loop CLK1 Crystal Driver CLK1 CLK0 S1:S0 2 X1/CLK 25 MHz crystal or clock X2 Pulling Capacitors 2 GND OE RR Pin Configuration S0 S1 SS0 X1/CLK X2 OE GNDX SS1 07-0274 1 2 3 4 5 6 7 8 1 16 15 14 13 12 11 10 9 VDDX CLK0 CLK0 GNDA VDDA CLK1 CLK1 IREF PS8824C 12/14/07 PI6C557-03 PCI Express Clock Pin Description Pin Name S0 2 S1 3 SS0 4 X1/CLK 5 X2 6 OE www.DataSheet4U.com 7 GNDX 8 SS1 9 IREF 10 CLK1 11 CLK1 ...