Operating Temperature Range ........................... 0NC to +70NC
Storage Temperature Range ......................... -55NC to +150NC
Junction Temperature .....................................................+150NC
Lead Temperature (soldering, 10s) ...............................+300NC
Soldering Temperature (reflow) .....................................+260NC
PACKAGE THERMAL CHARACTERISTICS (Note 2)
TQFN
Junction-to-Ambient Thermal Resistance (q
JA
) ..........29°C/W
Junction-to-Case Thermal Resistance (q
JC
) .................2°C/W
Note 2:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-lay-
er board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +3.6V, C
CL
= 200nF coupling capacitor on each output, R
L
= 50I on each output, T
A
= 0NC to +70NC, unless oth-
erwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Note 3)
PARAMETER
DC PERFORMANCE
Power-Supply Range
V
CC
OEQ2 = GND, OEQ1 = GND,
OEQ0 = GND
OEQ2 = GND, OEQ1 = GND,
OEQ0 = V
CC
OEQ2 = GND, OEQ1 = V
CC
,
OEQ0 = GND
OEQ2 = GND, OEQ1 = V
CC
,
OEQ0 = V
CC
OEQ2 = V
CC
, OEQ1 = GND,
OEQ0 = GND
OEQ2 = V
CC
, OEQ1 = GND,
OEQ0 = V
CC
OEQ2 = V
CC,
OEQ1 = V
CC
,
OEQ0 = GND
OEQ2 = V
CC
, OEQ1 = V
CC
,
OEQ0 = V
CC
3.0
205
212
214
247
213
263
276
328
3.6
260
270
270
305
mA
270
330
345
410
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Current
I
CC
EN = V
CC
2
Maxim Integrated
MAX14950
Quad PCI Express Equalizer/Redriver
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, C
CL
= 200nF coupling capacitor on each output, R
L
= 50I on each output, T
A
= 0NC to +70NC, unless oth-
erwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
OEQ2 = GND, OEQ1 = GND,
OEQ0 = GND
OEQ2 = GND, OEQ1 = GND,
OEQ0 = V
CC
OEQ2 = GND, OEQ1 = V
CC
,
OEQ0 = GND
OEQ2 = GND, OEQ1 = V
CC
,
OEQ0 = V
CC
OEQ2 = V
CC
, OEQ1 = GND,
OEQ0 = GND
OEQ2 = V
CC
, OEQ1 = GND,
OEQ0 = V
CC
OEQ2 = V
CC
, OEQ1 = V
CC
,
OEQ0 = GND
OEQ2 = V
CC
, OEQ1 = V
CC
,
OEQ0 = V
CC
Differential Input Impedance
Differential Output Impedance
Common-Mode Resistance to
GND When Input Terminations
Are Not Powered
Common-Mode Resistance to
GND When Input Terminations
Are Powered
Output Short-Circuit Current
(Note 4)
Common-Mode Delta Between
Active and Idle States
DC Output Offset During Active
State
DC Output Offset During
Electrical Idle
Z
RX-DIFF-
DC
MIN
TYP
113
122
125
150
122
172
184
237
MAX
150
150
155
185
UNITS
Standby Current
I
STBY
EN = GND
mA
150
210
225
290
120
120
I
I
DC
DC
80
80
100
100
Z
TX-DIFF-
DC
Z
RX-HIGH-
IMP-DC
-150mV < V
IN_CM
< 200mV
50
kI
Z
RX-DC
DC
20
25
30
I
I
TX-SHORT
V
TX-CM-
DC-ACTIVE-
IDLE-DELTA
Single-ended
90
mA
8
mV
V
TX-
ACTIVE-
DIFF-DC
|(V
OUT_P -
V
OUT_N
)|
75
mV
V
TX-IDLE-
DIFF-DC
|(V
OUT_P -
V
OUT_N
)|
75
mV
Maxim Integrated
3
MAX14950
Quad PCI Express Equalizer/Redriver
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, C
CL
= 200nF coupling capacitor on each output, R
L
= 50I on each output, T
A
= 0NC to +70NC, unless oth-
erwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Note 3)
PARAMETER
AC PERFORMANCE (Note 4)
f = 0.05GHz to 1.25GHz
Differential Input Return Loss
Common-Mode Input Return
Loss
Differential Output Return Loss
Common-Mode Output Return
Loss
Redriver Operation Differential
Input-Signal Range
Full-Swing Differential Output
Voltage (No Deemphasis)
Output Deemphasis Ratio, 0dB
RL
RX-DIFF
f = 1.25GHz to 2.5GHz
f = 2.5GHz to 4GHz
RL
RX-CM
f = 0.05GHz to 2.5GHz
f = 2.5GHz to 4GHz
f = 0.05GHz to 1.25GHz
RL
TX-DIFF
f = 1.25GHz to 2.5GHz
f = 2.5GHz to 4GHz
RL
TX-CM
V
RX-DIFF-
PP
SYMBOL
CONDITIONS
MIN
10
8
5
6
4
10
8
4
6
4
100
TYP
MAX
UNITS
dB
dB
dB
f = 0.05GHz to 2.5GHz
f = 2.5GHz to 4GHz
dB
1200
1300
0
mV
P-P
mV
P-P
dB
V
TX-DIFF-
PP
|(V
OUT_P
- V
OUT_N
)|, OEQ2 = GND,
OEQ1 = GND, OEQ0 = GND
OEQ2 = GND, OEQ1 = GND,
OEQ0 = GND, Figure 1
OEQ2 = GND, OEQ1 = GND,
OEQ0 = V
CC,
Figure 1
OEQ2 = GND, OEQ1 = V
CC
,
OEQ0 = GND, Figure 1
800
V
TX-DE-
RATIO-0dB
V
TX-DE-
Output Deemphasis Ratio, 3.5dB
RATIO-
3.5dB
3.5
dB
Output Deemphasis Ratio, 6dB
Output Deemphasis Ratio, 6dB
with Higher Amplitude
Output Deemphasis Ratio, 3.5dB
with Preshoot
Output Deemphasis Ratio, 6dB
with Preshoot
Output Deemphasis Ratio, 9dB
with Preshoot
Output Deemphasis Ratio,
9dB with Preshoot with Higher
Amplitude
Input Equalization, 5dB
Input Equalization, 8dB
Input Equalization, 12dB
V
TX-DE-
RATIO-6dB
6
6
dB
dB
V
TX-DE-HA-
OEQ2 = GND, OEQ1 = V
CC
,
RATIO-6dB
OEQ0 = V
CC,
Figure 1
V
TX-DE-
PS-RATIO-
3.5dB
OEQ2 = V
CC
, OEQ1 = GND,
OEQ0 = GND, Figure 1
3.5
dB
V
TX-DE-PS-
OEQ2 = V
CC
, OEQ1 = GND,
RATIO-6dB
OEQ0 = V
CC
, Figure 1
V
TX-DE-PS-
OEQ2 = V
CC
, OEQ1 = V
CC
,
RATIO-9dB
OEQ0 = GND, Figure 1
V
TX-DE-PS-
HA-RATIO-
9dB
6
9
dB
dB
OEQ2 = V
CC
, OEQ1 = V
CC
,
OEQ0 = V
CC
, Figure 1
INEQ1 = GND, INEQ0 = GND (Note 5)
INEQ1 = GND, INEQ0 = V
CC
(Note 5)
INEQ1 = V
CC
, INEQ0 = GND (Note 5)
9
dB
V
RX-EQ-
5dB
5
8
12
dB
dB
dB
V
RX-EQ-
8dB
V
RX-EQ-
12dB
4
Maxim Integrated
MAX14950
Quad PCI Express Equalizer/Redriver
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3.0V to +3.6V, C
CL
= 200nF coupling capacitor on each output, R
L
= 50I on each output, T
A
= 0NC to +70NC, unless oth-
erwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25NC.) (Note 3)
PARAMETER
Input Equalization, 16dB
AC PERFORMANCE (Note 4)
Output Common-Mode Voltage
Swing Peak-to-Peak
Propagation Delay
Rise/Fall Time
Rise/Fall Time Mismatch
Deterministic Jitter
Random Jitter
V
TX-CM-
AC-PP
SYMBOL
V
RX-EQ-
16dB
CONDITIONS
INEQ1 = V
CC,
INEQ0 = V
CC
(Note 5)
MIN
TYP
16
MAX
UNITS
dB
Max(V
OUT_P
+ V
OUT_N
)/2
- Min(V
OUT_P
+ V
OUT_N
)/2
120
(Note 6)
(Note 6)
K28.5 pattern, AC-coupled, R
L
= 50I,
data rate = 8GT/s
D10.2 pattern, no deemphasis, no
preshoot, data rate = 8GT/s
From input to output, D10.2 pattern,
data rate = 1GT/s
From input to output, D10.2 pattern,
data rate = 1GT/s
D10.2 pattern, data rate = 1GT/s (Note 3)
D10.2 pattern, data rate = 1GT/s to 8GT/s
|(V
OUT_P
- V
OUT_N
)|
Voltage change in positive direction
600
150
300
65
10.5
0.5
20
160
100
240
mV
P-P
ps
ps
t
PD
t
TX-RISE-
FALL
t
TX-RF-
MISMATCH
5
23.5
1.5
ps
ps
P-P
ps
RMS
t
TX-DJ-DD
t
TX-RJ-DD
t
TX-IDLE-
Electrical Idle Entry Delay
SET-TO-
IDLE
5
8
ns
t
TX-IDLE-
Electrical Idle Exit Delay
TO-DIFF-
DATA
5
112
112
8
175
ns
Electrical Idle Detect Threshold
Output Voltage During Electrical
Idle (AC)
Receiver Detection Pulse
Amplitude
Receiver Detection Pulse Width
Receiver Detection Retry Period
CONTROL LOGIC
Input Logic-Level Low
Input Logic-Level High
Input Logic Hysteresis
Input Pulldown Resistance
ESD PROTECTION
ESD Voltage
V
TX-IDLE-
THRESH
mV
P-P
mV
P-P
mV
ns
ns
V
TX-IDLE-
DIFF-AC-P
20
V
TX-RCV-
DETECT
V
IL
V
IH
V
HYST
R
PD
Human Body Model
200
1.4
0.1
250
±5
0.6
V
V
V
kI
kV
Note
Note
Note
Note
3:
4:
5:
6:
All units are 100% production tested at T
A
= +70NC. Specifications for all temperature limits are guaranteed by design.
Guaranteed by design, unless otherwise noted.
Equivalent to same amount of deemphasis driving the input.
Rise and fall times are measured using 20% and 80% levels.
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