Datacom Systems D56 Spezifikationen PDF herunterladen (Seite 12)

Si5040

12 Rev. 1.3

Table 6. AC Characteristics–TD (Transmitter Input)

Parameter Symbol Test Condition Min Typ Max Unit

TX Path Data Rate 9.80 9.95 11.35 Gbps

Differential Input Return Loss SDD11

0.05–0.1 GHz 20 — — dB

0.1–5.5 GHz 8 — — dB

5.5–12 GHz See

Note

——dB

Common Mode Input Return Loss (TD) SCC11 0.1–15 GHz 3 — — dB

Total Non-DDJ

—0.45UI

Total Jitter TJ — 0.65 UI

Sinusoidal Jitter Tolerance

SJ — See

Figure 4

—UI

Eye Mask (See Figure 5) X1 — — 0.325 UI

Eye Mask (See Figure 5) Y1 50 — — mV

Eye Mask (See Figure 5) Y2 — — 525 mV

Notes:

1. Return loss is given by the following equation: SDD11(dB) = 8–20.66Log10(f/5.5), with f in GHz.

2. Total jitter less ISI.

3. The jitter tolerance given in Figure 5 is in addition to the random and deterministic jitter given in this table.

Table 7. CMU Timing Modes

Mode Description Typical Jitter Gen. Recommended CMU Jitter

Transfer Bandwidth Setting

0 No Reference Clock or

Asynchronous Reference Clock

1,2

3.5 mUI

rms

380 kHz

1 Clean, synchronous

2.5 mUI

rms

380 kHz

2 Clean, asynchronous

1,3

2.5 mUI

rms

1.37 kHz

Notes:

1. Reference clock with frequency equal to Baud rate /64 ±100 ppm and phase noise as defined in XFP Specification 3.1,

Section 3.9.

2. Since the default bandwidth for this mode is 100 kHz, Register 134 [7:4] should be written to a “4” to set the bandwidth

to 380 kHz.

3. Clean reference clock with frequency equal to exactly Baud rate /64 and phase noise as defined in XFP Specification

3.1, Section 3.9.1. REFCLK input amplitude >650 mVppd.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 107 108

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