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1 www.pericom.com P-0.1 04/29/11 All trademarks are property of their respective owners. Product Features ÎPCIe® 2.

Specifications
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Content	1 www.pericom.com P-0.1 04/29/11 All trademarks are property of their respective owners. Product Features ÎPCIe® 2.0 complaint →Phase jitter - 2.1ps RMS (typ) ÎLVDS compatible outputs ÎSupply voltage of 3.3V ±5% Î25MHz crystal or clock input frequency ÎHCSL outputs, 0.7V Current mode differential pair ÎJitter 40ps cycle-to-cycle (typ) ÎSpread of -0.5%, -1.0%, -1.5%, and no spread ÎIndustrial temperature range ÎSpread Bypass option available ÎSpread and frequency selection via external pins ÎPackaging: (Pb-free and Green) →20-pin, 173-mil wide TSSOP Description The PI6C557-05 is a spread spectrum clock generator compliant to PCI Express® 2.0 and Ethernet requirements. The device is used for PC or embedded systems to substantially reduce Elec- tromagnetic Interference (EMI). The PI6C557-05 provides four differential (HCSL) or LVDS spread spectrum outputs. The PI6C557-05 is configured to select spread and clock selection. Using Pericom s patented Phase- Locked Loop (PLL) techniques, the device takes a 25MHz crys- tal input and produces four pairs of differential outputs (HCSL) at 100MHz and 200MHz clock frequencies. It also provides spread selection of -0.5%, -1.0%, -1.5%, and no spread. Block DiagramPin Configuration PLL Crystal Driver VDD GND X1/CLK X2 25 MHzcrystal Spread Spectrum/ Output clock selection S[2:0]3 CLK1CLK1 Rr(IREF) CLK2 CLK2 2 2PullingCapacitors SS Circuitry CLK3CLK3 CLK0CLK0 OEPD or clock 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 CLK0 CLK0 CLK1 CLK1 GNDODA VDDODA CLK2 CLK2 CLK3 CLK3 VDDXD S0 S1 S2 X1 X2 PD OE GNDXD IREF PI6C557-05 PCIe® 2.0 Clock Generator with 4 HCSL Outputs 11-0063
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Following Datasheets	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) PI6CX201A_2 (5 pages) PI6PCIEB24_2 (7 pages) PI6UMC10802_2 (5 pages) PI7C8150A_db_2 (2 pages)
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