PDF DSC557-05 Data sheet ( Hoja de datos )

Número de pieza	DSC557-05
Descripción	Four Output PCIe Clock Generator
Fabricantes	Micrel Semiconductor
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No Preview Available ! DSC557-05 Crystal-less™ Four Output PCIe Clock Generator General Description The DSC557-05 is a Crystal-less™, four output PCI express clock generator meeting Gen1, Gen2, and Gen3 specifications. The clock generator uses proven silicon MEMS technology to provide excellent jitter and stability over a wide range of supply voltages and temperatures. By eliminating the external quartz crystal, MEMS clock generators significantly enhance reliability and accelerate product development, while meeting stringent clock performance criteria for a variety of communications, storage, and networking applications. DSC557-05 has an Output Enable / Disable feature allowing it to disable all outputs when OE1 and OE2 are low. Each output enable pin controls two banks of synchronous PCIe clocks. See the OE function diagram for more detail. The device is available in a 20 pin QFN. Additional output formats are in any combination of LVPECL, LVDS, and HCSL. Features  Meets PCIe Gen1, Gen2 & Gen3 specs  Available Output Formats: o HCSL, LVPECL, or LVDS o Mixed Outputs: LVPECL/HCSL/LVDS  Wide Temperature Range o Ext. Industrial: -40° to 105° C o Industrial: -40° to 85° C o Ext. commercial: -20° to 70° C  Supply Range of 2.25 to 3.6 V  Low Power Consumption o 30% lower than competing devices  Excellent Shock & Vibration Immunity o Qualified to MIL-STD-883  Available Footprints: o 20 QFN  Lead Free & RoHS Compliant  Short Lead Time: 2 Weeks Block Diagram Applications  Communications/Networking o Ethernet o 1G, 10GBASE-T/KR/LR/SR, and FcoE o Routers and Switches o Gateways, VoIP, Wireless AP’s o Passive Optical Networks  Storage o SAN, NAS, SSD, JBOD  Embedded Applications * Clk0+/-, Clk1+/-, Clk2 +/- and Clk3 +/- are 100 MHz as per PCIe standards. For other frequencies, please contact the factory. o Industrial, Medical, and Avionics o Security Systems and Office Automation o Digital Signage, POS and others  Consumer Electronics o Smart TV, Bluray, STB _____________________________________________________________________________________________________________________________ _________________ DSC557-05 Page 1 1 page DSC557-05 Crystal-less Four Output PCIe Clock Generator OE Function and Output Waveform: HCSL CLK+ 80% 50% 20% CLK- tR tF 1/f0 tDA VIH OE VIL tEN 675mV Ordering Information OE1 0 0 1 1 OE2 0 1 0 1 CLK1/CLK2 Synchronous CLK0 Hi-Z Hi-Z EN EN CLK1 Hi-Z EN Hi-Z EN CLK2 Hi-Z EN Hi-Z EN CLK3 Hi-Z Hi-Z EN EN CLK0/CLK3 Synchronous DSC557-05 4 4 4 4 K I 0 T 4T CLK 3 Output Format 1: LVCMOS 4 4 2: LVPECL 3: LVDS 4: HCSL CLK 2 Output Format 4 4 4 1: LVCMOS 2: LVPECL 3: LVDS 4: HCSL CLK 1 Output Format 1: LVCMOS 2: LVPECL 3: LVDS 4: HCSL CLK 0 Output Format 1: LVCMOS 2: LVPECL 3: LVDS 4: HCSL Packing T: Tape & Reel Stability 0: ±100ppm 1: ±50ppm Temp Range E: -20 to 70 I: -40 to 85 L: -40 to 105 Package K: 20 QFN _____________________________________________________________________________________________________________________________ _________________ DSC557-05 Page 5 5 Page

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