ADVANCE
CYW43570
Table 39. PCI Express Interface Parameters (Cont.)
Parameter
Symbol
Comments
Min.
Typ.
Max.
Unit
mV
Absolute delta of DC
common-model voltage
between D+ and D-
VTX-CM-DC-LINE-DELTA DC offset between D+ and 0
D-
–
25
Electrical idle differential VTX-IDLE-DIFF-AC-p
peak output voltage
Peak-to-peak voltage
0
–
–
–
20
mV
mA
Ω
TX short circuit
current
ITX-SHORT
Current limit when TX
output is shorted to ground.
–
90
DC differential TX termi-
nation
ZTX-DIFF-DC
Low impedance defined
during signaling
(parameter is captured for
5.0 GHz by RLTX-DIFF)
80
120
Differential
return loss
RLTX-DIFF
Differential
return loss
10 (min)
for 0.05:
1.25 GHz
–
–
dB
Common-mode
return loss
RLTX-CM
TTX-EYE
Common-mode return loss 6
–
–
–
–
dB
UI
TX eye width
Minimum TX
eye width
0.75
Document Number: 002-15054 Rev. *I
Page 82 of 94
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