XIO2000AI TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS], XIO2000AI Datasheet - Page 147

• Manufacturer Part Number: XIO2000AI
• Description: PCI Express to PCI Bus Translation Bridge
• Manufacturer: TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]

7.5
NOTES: 11. No test load is necessarily associated with this value.
April 2007 Revised October 2008
UI
Unit interval
V RX-DIFFp-p
Differential input
peak-to-peak voltage
T RX-EYE
Minimum receiver eye
width
T RX-EYE-MEDIAN-to-MAX-
JITTER
Maximum time between
the jitter median and
maximum deviation
from the median.
V RX-CM-ACp
AC peak common mode
input voltage
RL RX-DIFF
Differential return loss
RL RX-CM
Common mode return
loss
Z RX-DIFF-DC
DC differential input
impedance
Z RX-DC
DC input impedance
Z RX-HIGH-IMP-DC
Powered down dc input
impedance
V RX-IDLE-DET-DIFFp-p
Electrical idle detect
threshold
T RX-IDLE-DET-DIFF-ENTER
-TIME
Unexpected electrical
idle enter detect
threshold integration
time
PARAMETER
PCI Express Differential Receiver Input Ranges
12. Specified at the measurement point and measured over any 250 consecutive UIs. A test load must be used as the RX device when
taking measurements. If the clocks to the RX and TX are not derived from the same reference clock, then the TX UI recovered from
3500 consecutive UIs is used as a reference for the eye diagram.
TERMINALS
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
RXP, RXN
399.88
0.175
MIN
200K
0.4
10
80
40
65
6
NOM
400
100
50
400.12
MAX
1.200
150
120
175
0.3
60
10
UNITS
mV
mV
ms
dB
dB
ps
UI
UI
V
Ω
Ω
Ω
Each UI is 400 ps ±300 ppm. UI does not account for SSC
dictated variations.
See Note 11.
V RX-DIFFp-p = 2*|V RXP − V RXN |
See Note 12.
The maximum interconnect media and transmitter jitter that
can be tolerated by the receiver is derived as
T RX-MAX- JITTER = 1 − T RX-EYE = 0.6 UI
See Notes 12 and 13.
Jitter is defined as the measurement variation of the
crossing points (V RX-DIFFp-p = 0 V) in relation to recovered
TX UI. A recovered TX UI is calculated over
3500 consecutive UIs of sample data. Jitter is measured
using all edges of the 250 consecutive UIs in the center of
the 3500 UIs used for calculating the TX UI.
See Notes 12 and 13.
V RX-CM-ACp = RMS(|V RXP + V RXN |/2 – V RX-CM-DC )
V RX-CM-DC = DC (avg) of |V RXP + V RXN |/2
See Note 12.
Measured over 50 MHz to 1.25 GHz with the P and N lines
biased at +300 mV and −300 mV, respectively.
See Note 14.
Measured over 50 MHz to 1.25 GHz with the P and N lines
biased at +300 mV and −300 mV, respectively.
See Note 14.
RX dc differential mode impedance
See Note 15.
Required RXP as well as RXN dc impedance (50 Ω ±20%
tolerance)
See Notes 12 and 15.
Required RXP as well as RXN dc impedance when the
receiver terminations do not have power.
See Note 16.
V RX-IDLE-DET-DIFFp-p = 2 * |V RXP − V RXN | measured at the
receiver package terminals
An unexpected electrical idle
(V RX-DIFFp-p < V RX-IDLE-DET-DIFFp-p ) must be recognized no
longer than T RX-IDLE-DET-DIFF-ENTER-TIME to signal an
unexpected idle condition.
COMMENTS
Electrical Characteristics
SCPS155C
137