Electrical Characteristics
Table 4-7. DC Output Characteristic (Sheet 2 of 2)
3.3V Signal
Min Max
Symbol
Parameter
Unit
Notes
VOH2
VOL3
VOH3
Output High Voltage
Output Low Voltage
Output High Voltage
N/A
0.4
V
V
V
IOL4=14 mA
Open Drain
N/A
4.1.7.1
PCI Express Interface DC Specifications
4.1.7.1.1
Differential Transmitter (TX) DC Output Specifications
Table 4-8 defines the DC specifications of parameters for the differential output at all transmitters
(TXs). The parameters are specified at the component pins.
Table 4-8. Differential Transmitter (TX) DC Output Specifications (Sheet 1 of 2)
Symbol
Parameter
Min
Nom Max Units Comments
VTX-DIFFp-p
Differential Peak to
Peak Output Voltage
0.800
1.2
V
VTX-DIFFp-p = 2*|VTX-D+-VTX-D-
See Note 1.
|
VTX-DE-RATIO De-Emphasized
Differential Output
-3.0
-3.5
-4.0
dB
This is the ratio of the VTX-DIFFp-p
of the second and following bits
after a transition divided by the
Voltage (Ratio)
V
TX-DIFFp-p of the first bit after a
transition
See Note 1.
VTX-CM-ACp
AC Peak
Common Mode
Output Voltage
20
100
25
mV
mV
mV
VTX-CM-ACp = |VTX-D+ + vTX-D-| / 2
– vTX-CM-DC
vTX-CM-DC = DC(avg) of |VTX-D+
VTX-D-| / 2
+
See Note 1.
VTX-CM-DC-
Absolute Delta of DC
Common Mode Voltage
During L0 and Electrical
Idle
0
0
|VTX-CM-DC– VTX-CM-Idle-DC[During
Electrical Idle]| =100mv
ACTIVE-IDLE-
DELTA
V
V
TX-CM-DC = DC(avg) of |VTX-D+
TX-D-| / 2 [Electrical Idle]
+
See Note 1.
VTX-CM-DC-
Absolute Delta of DC
Common Mode Voltage
between D+ and D-.
|VTX-CM-DC-D+– VTX-CM-DC-D-| =
25mV
LINE-DELTA
V
TX-CM-DC-D+ = DC(avg) of |VTX-D+
|
V
TX-CM-DC-D- = DC(avg) of |VTX-D-
|
See Note 1.
VTX-IDLE-
Electrical Idle
Differential Peak
Output Voltage
0
20
mV
mV
VTX-IDLE-DIFFp =|VTX-Idle-D+ -VTx-
Idle-D-| = 20mV
See Note 1.
DIFFp
VTX-RCV-
Amount of voltage
change allowed during
Receiver Detection
600
The total amount of voltage
change that a transmitter can
apply to sense whether a low
impedance receiver is present.
DETECT
RLTX-DIFF
Differential Return Loss
12
dB
Measured over 50 MHz to 1.25
GHz
See Note 2.
Intel® 6702PXH 64-bit PCI Hub Datasheet
159
INTEL [ INTEL ]
