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CHEETAH 15K.7 FC PRODUCT MANUAL, REV. E 65
11.6.4 FC Differential input
The serial input signal voltage characteristics are provided in Table 32.
Figure
17 provides the data valid eye diagram for typical and minimum requirements to recover data at the specified
interface error rate. The inputs are AC coupled on the drive.
Figure 17. Receive eye diagram
Table 33 Eye diagram data values
LINK RATE
1 GHZ 2 GHZ 4 GHZ
Bit time 941 ps 470 ps 235 ps
XMIT eye 725 ps min. 315 ps min. 158
21
1. Short Ideal load.
/113
2. End of compliance channel.
RCV eye Typical 659 ps 305 ps 145 ps
Minimum 395 ps 226 ps 113 ps
Table 32 FC Differential input characteristics
DESCRIPTION PARAMETER NOTES
Serial input voltage swing 200 < V
in
< 1.300 mV AC coupled
941 ps
659 ps
Vin (mv)
Typical
Minimum
376 ps