BCM43455 Preliminary Data Sheet
PCI Express Interface Parameters
Table 61: PCI Express Interface Parameters (Cont.)
Parameter
Symbol
Comments
Minimum Typical Maximum Unit
RX detection voltage VTX-RCV-DETECT
swing
The amount of voltage –
change allowed during
receiver detection.
–
–
–
–
600
100
20
mV
mV
mV
mV
TX AC peak common- VTX-CM-AC-PP
mode voltage
(5 GT/s)
TX AC common mode
voltage (5 GT/s)
–
–
0
TX AC peak common- VTX-CM-AC-P
mode voltage
(2.5 GT/s)
TX AC common mode
voltage (2.5 GT/s)
Absolute delta of DC VTX-CM-DC-ACTIVE- Absolute delta of DC
100
common-model
voltage during L0 and
electrical idle
IDLE-DELTA
common-model voltage
during L0 and electrical
idle.
Absolute delta of DC VTX-CM-DC-LINE-
DC offset between D+
and D-
0
–
25
mV
common-model
voltage between D+
and D-
DELTA
Electrical idle
differential peak output
voltage
VTX-IDLE-DIFF-AC-p 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
termination
ZTX-DIFF-DC
Lowimpedancedefined 80
during signaling
120
(parameter is captured
for 5.0 GHz by RLTX-
DIFF)
Differential
return loss
RLTX-DIFF
Differential
return loss
10 (min.)
for 0.05:
1.25 GHz
–
–
dB
8 (min.) for
1.25:
2.5 GHz
Common-mode
return loss
RLTX-CM
TTX-EYE
Common-mode return
loss
6
–
–
–
–
dB
UI
TX eye width
Minimum TX
eye width
0.75
Broadcom®
November 5, 2015 • 43455-DS109-R
Page 149
BROADCOM CONFIDENTIAL
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