GL9701 PCI ExpressTM to PCI Bridge
7.3 Differential Receiver (RX) Input Specification
The following table defines the specification of parameters for all differential Receivers (RXs). The
parameters are specified at the component pins.
Symbol
Parameter
Min
Typ
Max Units
Comments
Unit Interval
399.88 400 400.12 ps The UI is 400 ps +/- 300 ppm. UI
does not account for SSC dictated
variations.
See Note 7.
Differential
Input Peak to
Peak Voltage
Minimum
0.175
0.4
1.2
V
VRX-DIFFp-p =
2*|VRX-D+ -VRX-D-|
See Note 8.
VRX-DIFFp-p
TRX-EYE
UI The maximum interconnect
media and Transmitter jitter that can
be tolerated by the Receiver can be
derived as TRX-MAX-JITTER =
1 - TRX-EYE = 0.6 UI.
See Notes 8, 9, and 10.
Receiver Eye
Width
Maximum time
between the
0.3
UI Jitter is defined as the measurement
variation of the crossing points
(VRX-DIFFp-p = 0 V) in relation
to a recovered TX UI. To be
measured after the clock recovery
function.
TRX-EYE-MEDI
AN-to-
jitter median
and maximum
deviation from
the median.
MAX-JITTER
See Notes 8 and 9.
AC Peak
150
mV VRX-CM-AC =
VRX-CM-ACp
Common Mode
Input Voltage
|VRX-D+ + VRX-D-|/2 –
VRX-CM-DC
VRX-CM-DC = DC(avg) of
|VRX-D++ VRX-D-|/2
See Note 8.
Differential
Return Loss
10
6
dB Measured over 50 MHz to
1.25 GHz.
RLRX-DIFF
RLRX-CM
See Note 11.
Common Mode
dB Measured over 50 MHz to
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