Datasheet
The eye pattern in Figure 6.5 defines the receiver sensitivity requirements for a hub (signal applied at test point TP2 of Figure 6.3) or a device without a captive cable (signal applied at test point TP3 of Figure 6.3). The corresponding signal levels and timings are given in the table below. Timings are given as a percentage of the unit interval (UI), which represents the nominal bit duration for a 480 Mbit/s transmission rate.
Level 1 |
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| 400mV | |
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| Differential | |
Point 3 | Point 4 |
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Point 1 | Point 2 | 0 Voltｓ | |
Differential | |||
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Point 5 | Point 6 |
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| Differential | |
Level 2 |
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0% |
| 100% |
Figure 6.5 Eye Pattern for Receive Waveform and Eye Pattern Definition
| VOLTAGE LEVEL (D+, | TIME (% OF UNIT INTERVAL) |
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Level 1 | 575mV | N/A |
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Level 2 | N/A | |
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Point 1 | 0V | 15% UI |
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Point 2 | 0V | 85% UI |
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Point 3 | 150mV | 35% UI |
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Point 4 | 150mV | 65% UI |
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Point 5 | 35% UI | |
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Point 6 | 65% UI | |
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Revision 1.5 | 20 | SMSC USB3280 |
| DATASHEET |
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