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MAX14950 Datasheet Download - Maxim Integrated

Номер произв MAX14950
Описание Quad PCI Express Equalizer/Redriver
Производители Maxim Integrated
логотип Maxim Integrated логотип 



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MAX14950 Даташит, Описание, Даташиты
EVALUATION KIT AVAILABLE
MAX14950
Quad PCI Express Equalizer/Redriver
General Description
The MAX14950 is a quad equalizer/redriver designed to
improve PCI Express® (PCIe) signal integrity by provid-
ing programmable input equalization at its receiver and
programmable redrive circuitry. The output circuitry re-
establishes deemphasis lost on the board and compen-
sates for circuit-board loss. The device permits optimal
placement of key PCIe components. The device is useful
with stripline, microstrip printed circuits, and balanced
100I cable.
The device is tailored for PCIe and features electrical idle
and receiver detection on each channel. It is optimized
for PCIe Gen III (8.0GT/s) and Gen II (5.0GT/s) data
rates, while still handling Gen I (2.5GT/s).
The MAX14950 is available in a small, lead-free, 42-pin
(3.5mm x 9.0mm) TQFN package for optimal layout and
minimal space requirements. The device is specified
over the 0NC to +70NC operating temperature range.
Applications
Servers
Storage
Desktop Computers/Notebook PCs
Communications Switchers
Features
S Optimized for Generation III (8.0GT/s) and
Generation II (5.0GT/s) with Generation I (2.5GT/s)
Compatibility
S Receive Detection Permits Completely
Transparent, Software-Free Operation
S Equalization Permits Placement of Up to 30in FR4
S PCIe Gen III (8.0GT/s)-Compliant Input/Output
Return Loss
S Electrical Idle Detection
S Very Low Latency: 160ps (typ) Propagation Delay
S Random Jitter P 0.5psRMS (typ)
S Deterministic Jitter P 10.5psP-P (typ)
S Four-Level-Programmable Input Equalization
S Eight-Level-Programmable Output Emphasis
S On-Chip 50I Input/Output Terminations
S Single +3.3V Supply Operation
S ±5kV Human Body Model (HBM) Protection On All
Pins
S Space-Saving: 3.5mm x 9.0mm TQFN Package
S Pin Compatible with MAX4950 PCIe Generation II
Redriver/Equalizer
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX14950CTO+
0NC to +70NC
42 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
PCI Express is a registered trademark of PCI-SIG Corp.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5715; Rev 1; 11/12







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MAX14950 Даташит, Описание, Даташиты
MAX14950
Quad PCI Express Equalizer/Redriver
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
VCC ......................................................................... -0.3V to +4V
All Other Pins (Note 1) ............................ -0.3V to (VCC + 0.3V)
Continuous Current IN_P/IN_N ...................................... Q30mA
Peak Current IN_P/IN_N (pulsed for 1Fs, 1% duty cycle) ..... Q100mA
Continuous Power Dissipation (TA = +70NC)
TQFN (derate 34.5mW/NC above +70NC) ................. 2759mW
Note 1: All I/O pins are clamped by internal diodes.
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 (qJA)...........29°C/W
Junction-to-Case Thermal Resistance (qJC)..................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
(VCC = +3.0V to +3.6V, CCL = 200nF coupling capacitor on each output, RL = 50I on each output, TA = 0NC to +70NC, unless oth-
erwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Note 3)
PARAMETER
DC PERFORMANCE
Power-Supply Range
SYMBOL
VCC
CONDITIONS
MIN TYP MAX UNITS
3.0 3.6
OEQ2 = GND, OEQ1 = GND,
OEQ0 = GND
205 260
V
OEQ2 = GND, OEQ1 = GND,
OEQ0 = VCC
212 270
OEQ2 = GND, OEQ1 = VCC,
OEQ0 = GND
214 270
Supply Current
OEQ2 = GND, OEQ1 = VCC,
ICC
EN = VCC
OEQ0 = VCC
OEQ2 = VCC, OEQ1 = GND,
OEQ0 = GND
247 305
213 270
mA
OEQ2 = VCC, OEQ1 = GND,
OEQ0 = VCC
263 330
OEQ2 = VCC, OEQ1 = VCC,
OEQ0 = GND
276 345
OEQ2 = VCC, OEQ1 = VCC,
OEQ0 = VCC
328 410
2   Maxim Integrated







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MAX14950 Даташит, Описание, Даташиты
MAX14950
Quad PCI Express Equalizer/Redriver
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, CCL = 200nF coupling capacitor on each output, RL = 50I on each output, TA = 0NC to +70NC, unless oth-
erwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Note 3)
PARAMETER
Standby Current
Differential Input Impedance
Differential Output Impedance
Common-Mode Resistance to
GND When Input Terminations
Are Not Powered
SYMBOL
ISTBY
ZRX-DIFF-
DC
ZTX-DIFF-
DC
CONDITIONS
OEQ2 = GND, OEQ1 = GND,
OEQ0 = GND
OEQ2 = GND, OEQ1 = GND,
OEQ0 = VCC
OEQ2 = GND, OEQ1 = VCC,
OEQ0 = GND
EN = GND
OEQ2 = GND, OEQ1 = VCC,
OEQ0 = VCC
OEQ2 = VCC, OEQ1 = GND,
OEQ0 = GND
OEQ2 = VCC, OEQ1 = GND,
OEQ0 = VCC
OEQ2 = VCC, OEQ1 = VCC,
OEQ0 = GND
OEQ2 = VCC, OEQ1 = VCC,
OEQ0 = VCC
DC
DC
ZRX-HIGH-
IMP-DC
-150mV < VIN_CM < 200mV
MIN
80
80
50
TYP
113
MAX
150
UNITS
122 150
125 155
150 185
122 150
mA
172 210
184 225
237 290
100 120
I
100 120
I
kI
Common-Mode Resistance to
GND When Input Terminations
Are Powered
ZRX-DC DC
20 25 30
I
Output Short-Circuit Current
(Note 4)
ITX-SHORT Single-ended
90 mA
Common-Mode Delta Between
Active and Idle States
VTX-CM-
DC-ACTIVE-
IDLE-DELTA
8 mV
DC Output Offset During Active
State
DC Output Offset During
Electrical Idle
VTX-
ACTIVE-
DIFF-DC
VTX-IDLE-
DIFF-DC
|(VOUT_P - VOUT_N)|
|(VOUT_P - VOUT_N)|
75 mV
75 mV
Maxim Integrated
  3










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