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PI6C49021ZDIE Datasheet(PDF) 11 Page - Pericom Semiconductor Corporation |
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PI6C49021ZDIE Datasheet(HTML) 11 Page - Pericom Semiconductor Corporation |
11 / 15 page 11 www.pericom.com P-0.1 02/27/13 PI6C49021 Low Power High Integration Clock Generator All trademarks are property of their respective owners. 6. Refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing. Refers to all crossing points for this measurement. 7. Defines as the absolute minimum or maximum instantaneous period. This includes cycle-to-cycle jitter, relative PPM tolerance, and spread spectrum modulation. 8. Defined as the total variation of all crossing voltages of rising 100M+ and falling 100M–. 9. Refer to section 4.3.2.1 of the PCI Express Base Specification, Revision 1.1 for information regarding PPM considerations. 10. PPM refers to parts per million and is a DC absolute period accuracy specification. 1 PPM is 1/1,000,000th of 100 MHz exactly or 100 Hz. For 300 PPM there is an error budget of 100Hz/PPM * 300 PPM = 30 kHz. The period is measured with a frequency counter with measurement window set at 100 ms or greater. With spread spectrum turned off the error is less than ±300 ppm. With spread spectrum turned on there is an additional +2500 PPM nominal shift in maximum period resulting from the -0.5% down spread. Electrical Characteristics - 25MHz LVPECL outputs Notes (Continued) Parameter Min Typ Max Unit Cycle Time - 40 - ns Duty Cycle 45 - 55 % Rise/Fall Time (20%-80%) 0.3 - 0.6 ns RMS Jitter (12kHz-5 MHz) - - 2 (spur off) ps-RMS Clock Tolerance (25MHz) -50 - +50 ppm Output High Voltage V DD-1.4 V DD-0.9 V Output Low Voltage V DD-2.0 V DD-1.7 Peak to Peak Output Voltage Swing 0.6 1.0 13-0015 |
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