PI6C49004

PI6C49004 Networking Clock Generator Features 3.3V +/-10% Supply Voltage Uses 25MHz xtal such as Saronix-eCera™ SRX7278 Twelve PCIe® 100MHz outputs with optional -0.5% spread spectrum support Two LVCMOS 50MHz outputs that support +/- 10% frequency margining One frequency selectable 33/66/133MHz LVCMOS output One 32.256MHz LVCMOS output Industrial temperature -40°C to 85°C Package: 56-pin TSSOP package Description The PI6C49004 is a clock generator device intended for PCIe®/ networking applications. The device includes twelve 100MHz differential Host Clock Signal Level (HCSL) outputs for PCIe, two single-ended 50MHz outputs, one single-ended 32.256MHz output, and one selectable single-ended 33/66/133MHz output. Using a serially programmable SMBUS interface, the PI6C49004 incorporates spread spectrum modulation on the twelve 100MHz HCSL PCIe outputs, and independent frequency margining on the 50MHz output, 33.3333MHz and 66.6666MHz clock outputs. Pin Configuration Block Diagram 25 MHz crystal or clock input Clock Buffer/ Crystal Oscillator VDD 12 SCLK SDATA PD_RESET PLL, Dividers, Buffers, and Logic 12 100M_OUT(0-11) 2 50M_OUT(1-2) 33/66/133M_OUT1 32.256M_OUT1 8 GND ISET 475 Ohms 1% VDD IREF NC 100M_Q11100M_Q11+ 100M_Q10100M_Q10+ VDD VDD GND 100M_Q9100M_Q9+ 100M_Q8100M_Q8+ 100M_Q7100M_Q7+ SCLK SDATA GND 50M_OUT1 50M_OUT2 VDD GND VDD 32.256M_OUT1 GND NC PD_RESET 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 11-0...