DS80PCI800 Datasheet, PDF (8/39 Pages) Texas Instruments – 2.5 Gbps / 5.0 Gbps / 8.0 Gbps 8 Channel PCI Express Repeater with Equalization and De-Emphasis

Symbol
Parameter
Conditions
Min
High Speed Outputs
V_tx-diff-pp
Output Voltage
Differential measurement
0.8
Differential Swing
with OUT_n+ and OUT_n-,
terminated by 50Ω to GND,
AC-Coupled, VID = 1.0 Vp-p,
DEM0 = 1, DEM1 = 0,
(Note 7)
V_{tx-de-ratio_3.5}
TX de-emphasis ratio
VOD = 1.0 Vp-p,
DEM0 = 0, DEM1 = R,
GEN 1, 2 modes only
V_{tx-de-ratio_6}
TX de-emphasis ratio
VOD = 1.0 Vp-p,
DEM0 = R, DEM1 = R,
GEN 1, 2 modes only
T_TX-HF-DJ-DD
TX Dj > 1.5 MHz
T_TX-HF-DJ-DD
TX RMS jitter < 1.5 MHz
T_TX-RISE-FALL
TX rise/fall time
20% to 80% of differential
35
output voltage
T_RF-MISMATCH
TX rise/fall mismatch 20% to 80% of differential
output voltage
RL_TX-DIFF
TX Differential return 0.05 - 1.25 GHz
loss
1.25 - 2.5 GHz
2.5 - 4 GHz
RL_TX-CM
TX Common mode
return loss
0.05 - 2.5 GHz
2.5 - 4 GHz
Z_TX-DIFF-DC
DC differential TX
impedance
V_TX-CM-AC-PP
TX AC common mode VOD = 1.0 Vp-p,
voltage
DEM0 = 1, DEM1 = 0
I_TX-SHORT
TX short circuit current Total current the transmitter
limit
can supply when shorted to
VDD or GND
V_TX-CM-DC-
Absolute delta of DC
ACTIVE-IDLE-DELTA ^{common mode voltage}
during L0 and electrical
idle
V_{TX-CM-DC-LINE-}
DELTA
Absolute delta of DC
common mode voltgae
between TX+ and TX-
T_TX-IDLE-DATA
Max time to transition to VID = 1.0 Vp-p, 8 Gbps
differential DATA signal
after IDLE
T_TX-DATA-IDLE
Max time to transition to VID = 1.0 Vp-p, 8 Gbps
IDLE after differential
DATA signal
T_PLHD/PHLD
High to Low
EQ = 00, (Note 6)
and Low to High
Differential Propagation
Delay
T_LSK
T_PPSK
Lane to lane skew
T = 25C, VDD = 2.5V
Part to part propagation T = 25C, VDD = 2.5V
delay skew
Typ
1.0
-3.5
-6
45
0.01
-16
-12
-11
-12
-8
100
20
3.5
6.2
200
25
40
Max
Units
1.2
Vp-p
dB
dB
0.15
UI
3.0
ps RMS
ps
0.1
UI
dB
dB
dB
dB
dB
Ω
100
mVpp
mA
100
mV
25
mV
ns
ns
ps
ps
ps
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