Achronix Speedster22i SerDes - Manual (Page 106)

Parameter Description Min Typical Max Unit
Z
TX-DIFF-HIZ
Transmitter Output Differential DC
Impedance in Squelch Mode
>2k Ω
Z
TX-CM-HIZ
Transmitter Output Common-Mode
DC Impedance in Squelch Mode
>500 Ω
Transmitter Return Loss
Z
RL-DIFF-DC
Transmitter Differential DC Return
Loss
-14 dB
Z
RL-DIFF-NYQ
Transmitter Differential Return Loss
at Nyquist Frequency (F
BAUD
/2)
-6 dB
Z
RL-CM-DC
Transmitter Common-Mode DC
Return Loss
-6 dB
Z
RL-CM-NYQ
Transmitter Common-Mode Return
Loss at Nyquist Frequency (F
BAUD
)
-4 dB
Electrical Idle
V
TX-IDLE
Idle Output Voltage 20 mV
pkpk
V
CM-DELTA-
SQUELCH
Maximum Common-Mode Step
Entering/Exiting Squelch Mode
50 mV
T
TX-IDLE-
LATENCY
Latency Entering/Exiting Idle 8 ns
Receiver Detect
VTX-RCV-DETECT
Voltage change allowed during
receiver detection
600 mV
Table 24: Jitter
Standard Total Jitter (TJ)
Deterministic
Jitter (DJ)
Units Compliant?
PCI Express
Gen1/Gen2/Gen3
0.25 0.15
UI
p-p
Yes
GigE – SGMII 0.375 0.125 UI
p-p
Yes
10G Ethernet – XAUI 0.35 0.17 UI
p-p
Yes
CEI 6G – SR/LR 0.3 0.15 UI
p-p
Yes
CEI 11G – SR/MR/LR 0.3 0.15 UI
p-p
Yes
Fibre Channel (FC-1, FC-
2, FC-4, FC-8)
0.24 0.12 UI
p-p
Yes
SATA (Gen1, Gen2) 0.37 0.15 UI
p-p
Yes
106 UG028, July 1, 2014