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GL9714 データシート(PDF) 39 Page - GENESYS LOGIC |
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GL9714 データシート(HTML) 39 Page - GENESYS LOGIC |
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39 / 46 page ![]() GL9714 PCI Express TM PIPE x4 PHY ©2004-2007 Genesys Logic Inc. - All rights reserved. Page 39 7.5 Differential Transmitter and Receiver Serial Output Transmitter Serial Output Table 7.6 – Transmitter Serial Output Symbol Parameter Min Typ Max Unit UI Unit interval 399.88 400 400.12 ps VTX-DIFFp-p Differential peak to peak output voltage 0.8 - 1.2 V VTX-DE-RATIO De-emphasized differential output voltage (Ratio) -3.0 -3.5 -4.0 dB TTX-EYE Minimum TX eye width 0.7 - - UI TTX-EYE-MEDIAN-to-MAX-JITTER Maximum time between the jitter median and maximum deviation from the median - - 0.15 UI TTX-RISE, TTX-FALL D+/D- TX output rise/fall time 0.125 - - UI VTX-CM-ACp RMS AC peak common mode output voltage - - 20 mV VTX-CM-DC-ACTIVE-IDLE-DELTA Absolute delta of DC common mode voltage during L0 and electrical idle 0 - 100 mV VTX-CM-DC-LINE-DELTA Absolute delta of DC common mode voltage between D+ and D- 0 - 25 mV VTX-IDLE-DIFFp Electrical idle differential peak output voltage 0 - 20 mV VTX-RCV-DETECT The amount of voltage change allowed during receiver detection - - 600 mV VTX-DC-CM The TX DC common mode voltage 0 - 3.6 V ITX-SHORT TX short circuit current limit - - 90 mA TTX-IDLE-MIN Minimum time spent in electrical idle 50 - - UI TTX-IDLE-SET-TO-IDLE Maximum time to transition to a valid electrical idle after sending an electrical idle ordered set - - 20 UI TTX-IDLE-TO-DIFF-DATA Maximum time to transition to valid TX specifications after leaving an electrical idle condition - - 20 UI RLTX-DIFF Differential return loss 12 - - dB RLTX-CM Common mode return loss 6 - - dB ZTX-DIFF-DC DC differential TX impedance 80 100 120 Ω LTX-SKEW Lane-to-lane output skew - - 500 + 2UI ps CTX AC coupling capacitor 75 - 200 nF Tcrosslink Crosslink random timeout 0 - 1 ms |
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