DS50PCI402 Datasheet, PDF (13/36 Pages) Texas Instruments – DS50PCI402 2.5 Gbps / 5.0 Gbps 4 Lane PCI Express Repeater with Equalization and De-Emphasis

Symbol
Parameter
Conditions
CML RECEIVER INPUTS (IN_n+, IN_n-)
RL_RX-DIFF
Rx package plus Si 0.05GHz – 1.25GHz (Note 6)
differential return loss _{1.25GHz – 2.5GHz (Note 6)}
RL_RX-CM
Common mode Rx
return loss
0.05GHz - 2.5GHz (Note 6)
Z_RX-DC
Rx DC common mode Tested at VDD=0
impedance
Z_RX-DIFF-DC
Rx DC differential
impedance
Tested at VDD=0
V_RX-DIFF-DC
Differential Rx peak to Tested at DC, TXIDLEx=0
peak voltage
Z_{RX-HIGH-IMP-DC -POS}
DC Input CM
impedance for V>0
Vin = 0 to 200 mV,
RXDETA/B = 0,
ENSMB = 0, VDD=2.625
V_{RX-IDLE-DET-DIFF-PP}
Electrical Idle detect SD_TH = float, see Table 6,
threshold
(Note 16)
LPDS OUTPUTS (OUT_n+, OUT_n-)
V_TX-DIFF-PP
Output Voltage Swing Differential measurement with
OUT_n+ and OUT_n- terminated
by 50Ω to GND AC-Coupled,
Figure 4, (Note 13)
V_OCM
Output Common-Mode Single-ended measurement DC-
Voltage
Coupled with 50Ω termination,
(Note 3)
V_{TX-DE-RATIO-3.5}
Tx de-emphasis level
ratio
VOD = 1000 mV, DEM1 = GND,
DEM0 = VDD, (Note 3),
(Note 12)
V_{TX-DE-RATIO-6}
Tx de-emphasis level
ratio
VOD = 1000 mV, DEM1 = VDD,
DEM0 = GND, (Note 3),
(Note 12)
T_TX-HF-DJ-DD
T_TX-LF-RMS
T_TX-RISE-FALL
Tx Dj > 1.5 Mhz
(Note 7)
Tx RMS jitter < 1.5Mhz (Note 7)
Transmitter Rise/ Fall
Time
20% to 80% of differential output
voltage, Figure 3
(Note 3, Note 8)
T_RF-MISMATCH
Tx rise/fall mismatch 20% to 80% of differential output
voltage (Note 3, Note 8)
RL_TX-DIFF
Differential Output
Return Loss
0.05- 1.25 Ghz, See Figure 6
1.25- 2.5 Ghz, See Figure 6
RL_TX-CM
Common Mode Return 0.05- 2.5 Ghz, See Figure 6
Loss
Z_TX-DIFF-DC
DC differential Tx
impedance
V_TX-CM-AC-PP
Tx AC common mode
voltage
I_TX-SHORT
transmitter short circuit Total current transmitter can
current limit
supply when shorted to VDD or
GND
V_{TX-CM-DC- ACTIVE-IDLE-}
DELTA
Absolute Delta of DC
Common Mode
Voltage during L0 and
electrical Idle
Min
40
85
0.10
50
40
800
50
Typ
Max
-21
-20
-11.5
50
60
100
115
1.2
175
1000
1200
V_DD - 1.4
3.5
6
0.15
3.0
67
0.01
0.1
-23
-20
-11
100
100
90
40
Units
dB
dB
Ω
Ω
V
KΩ
mV_P-P
mV_P-P
V
dB
dB
UI
ps RMS
ps
UI
dB
dB
dB
Ω
mVpp
mA
mV
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