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Specifications
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1PS9047A 04/11/11 09-0098 Block Diagram PI6C49004 Networking Clock Generator Features • 3.3V +/-10% Supply Voltage R

Specifications
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Content	1PS9047A 04/11/11 09-0098 Block Diagram 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 VDD 12 12 100M_OUT(0-11) 50M_OUT(1-2) 33/66/133M_OUT1 32.256M_OUT1 ISET 475 Ohms 1%GND 8 PD_RESET SDATA SCLK PLL, Dividers, Buffers, and Logic Clock Buffer/ Crystal Oscillator 25 MHz crystal or clock input 2 VDD IREF NC 100M_Q11- 100M_Q11+ 100M_Q10- 100M_Q10+ VDD VDD GND 100M_Q9- 100M_Q9+ 100M_Q8- 100M_Q8+ 100M_Q7- 100M_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 GND VDD 100M_Q0- 100M_Q0+ 100M_Q1+ 100M_Q1- VDD GND VDD 100M_Q2+ 100M_Q2- 100M_Q3+ 100M_Q3- 100M_Q4+ 100M_Q4- 100M_Q5+ 100M_Q5- VDD GND VDD 100M_Q6+ 100M_Q6- 33/66/133M_OUT1 VDD GND VDD X2 X1 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 11-0080
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Following Datasheets	PI6C557-03_2 (8 pages) PI6C557-03A_2 (9 pages) PI6C557-03B_3 (9 pages) PI6C557-05_3 (9 pages) PI6C557-05B_3 (8 pages) PI6C557-10_3 (6 pages) PI6CL10804_2 (6 pages) PI6CV304_2 (8 pages) PI6CV857_2 (10 pages) PI6CV857L_2 (9 pages)
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