General Description
The MAX9376 is a fully differential, high-speed,
LVDS/anything-to-LVPECL/LVDS dual translator
designed for signal rates up to 2GHz. One channel is
LVDS/anything-to-LVPECL translator and the other
channel is LVDS/anything-to-LVDS translator. The
MAX9376’s extremely low propagation delay and high
speed make it ideal for various high-speed network
routing and backplane applications.
The MAX9376 accepts any differential input signal with-
in the supply rails and with minimum amplitude of
100mV. Inputs are fully compatible with the LVDS,
LVPECL, HSTL, and CML differential signaling stan-
dards. LVPECL outputs have sufficient current to drive
50Ωtransmission lines. LVDS outputs conform to the
ANSI EIA/TIA-644 LVDS standard.
The MAX9376 is available in a 10-pin µMAX®package
and operates from a single +3.3V supply over the -40°C
to +85°C temperature range.
Applications
Backplane Logic Standard Translation
LVDS-to-LVPECL, LVPECL-to-LVDS
Up/Downconverters
LANs
WANs
DSLAMs
DLCs
Features
oGuaranteed 2GHz Switching Frequency
oAccepts LVDS/LVPECL/Anything Inputs
o421ps (typ) Propagation Delays
o30ps (max) Pulse Skew
o2psRMS (max) Random Jitter
oMinimum 100mV Differential Input to Guarantee
AC Specifications
oTemperature-Compensated LVPECL Output
o+3.0V to +3.6V Power-Supply Operating Range
o>2kV ESD Protection (Human Body Model)
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
________________________________________________________________
Maxim Integrated Products
1
1
2
3
4
5
10
9
8
7
6
VCC
OUT1
OUT1
IN2OUT2
OUT2
IN1
IN1
ANYTHING
ANYTHING
LVDS
LVPECL
MAX9376
μMAX
TOP VIEW
IN2GND
Pin Configuration
Ordering Information
19-2809; Rev 1; 10/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Functional Diagram appears at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX9376EUB+ -40°C to +85°C 10 µMAX
+
Denotes a lead(Pb)-free/RoHS-compliant package.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +3.6V, differential input voltage |VID| = 0.1V to 3.0V, input voltage (VIN, VIN) = 0 to VCC, input common-mode voltage
VCM = 0.05V to (VCC - 0.05V), LVPECL outputs terminated with 50Ω±1% to (VCC - 2.0V), LVDS outputs terminated with 100Ω±1%,
TA= -40°C to +85°C. Typical values are at VCC = +3.3V, |VID| = 0.2V, input common-mode voltage VCM = 1.2V, TA= +25°C, unless
otherwise noted.) (Notes 2, 3, 4)
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.
VCC to GND...........................................................-0.3V to +4.1V
Inputs (IN_, IN_) .........................................-0.3V to (VCC + 0.3V)
IN to IN ................................................................................±3.0V
Continuous Output Current .................................................50mA
Surge Output Current .......................................................100mA
Continuous Power Dissipation (TA= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW
θJA in Still Air (Note 1) ............................................+180°C/W
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
ESD Protection
Human Body Model (IN_, IN_, OUT_, OUT_) ..................≥2kV
Soldering Temperature (10s) ...........................................+300°C
-40°C +25°C +85°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
DIFFERENTIAL INPUTS (IN_, IN_ )
Differential Input Threshold VTHD -100 +100 -100 +100 -100 +100 mV
Input Current IIN,
I IN
VIN, V IN =
VCC or 0V -20 +20 -20 +20 -20 +20 µA
Input Common-Mode
Voltage VCM Figure 1 0.05 VCC -
0.05 0.05 VCC -
0.05 0.05 VCC -
0.05 V
LVPECL OUTPUTS (OUT1, OUT1)
Single-Ended Output High
Voltage VOH Figure 3 VCC -
1.085
VCC -
1.035
VCC -
0.880
VCC -
1.025
VCC -
0.985
VCC -
0.880
VCC -
1.025
VCC -
0.976
VCC -
0.880 V
Single-Ended Output Low
Voltage VOL Figure 3 VCC -
1.830
VCC -
1.745
VCC -
1.620
VCC -
1.810
VCC -
1.694
VCC -
1.620
VCC -
1.810
VCC -
1.681
VCC -
1.620 V
Differential Output Voltage VOH -
VOL Figure 3 595 710 595 710 595 710 mV
LVDS OUTPUTS (OUT2, OUT2 )
Differential Output Voltage VOD Figure 2 250 366 450 250 352 450 250 339 450 mV
Change in Magnitude of
VOD Between
Complementary Output
States
|ΔVOD| Figure 2 1.0 20 1.0 20 1.0 20 mV
Offset Common-Mode
Voltage VOS Figure 2 1.125 1.375 1.125 1.250 1.375 1.125 1.375 V
Change in Magnitude of
VOS Between
Complementary Output
States
|ΔVOS| Figure 2 1.0 20 1.0 20 1.0 20 mV
Output Short-Circuit
Current, Either Output
Shorted to GND
|IOS|
V
ID = ± 100m V ,
one outp ut GN D ,
other outp ut op en
or shor ted to G N D
19 24 18 24 18 24 mA
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +3.6V, differential input voltage |VID| = 0.1V to 1.2V, input frequency ≤1.34GHz, differential input transition time =
125ps (20% to 80%), input voltage (VIN, VIN) = 0 to VCC, input common-mode voltage (VCM) = 0.05V to (VCC - 0.05V), LVPECL out-
puts terminated with 50Ω±1% to (VCC - 2.0V), LVDS outputs terminated with 100Ω±1%, TA = -40°C to +85°C. Typical values are at
VCC = +3.3V, |VID| = 0.2V, input common-mode voltage VCM = 1.2V, TA= +25°C, unless otherwise noted.) (Note 5)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LVPECL OUTPUTS
Switching Frequency fMAX VOH - VOL ≥ 250mV 2.0 2.5 GHz
Propagation Delay Low to High tPLH Figure 3 250 421 600 ps
Propagation Delay High to Low tPHL Figure 3 250 421 600 ps
Pulse Skew |tPLH - tPHL|t
SKEW Figure 3 (Note 6) 6 30 ps
Output Low-to-High Transition tRFigure 3 116 220 ps
Output High-to-Low Transition tFFigure 3 119 220 ps
Added Random Jitter tRJ fIN = 1.34GHz (Note 7) 0.7 2 ps
(
RMS
)
LVDS OUTPUTS
Switching Frequency fMAX VOD ≥ 250mV 2.0 2.5 GHz
Propagation Delay Low to High tPLH Figure 3 250 363 600 ps
Propagation Delay High to Low tPHL Figure 3 250 367 600 ps
Pulse Skew |tPLH - tPHL|t
SKEW Figure 3 (Note 6) 5 30 ps
Output Low-to-High Transition
Time (20% to 80%) tRFigure 2 93 220 ps
Output High-to-Low Transition
Time (20% to 80%) tFFigure 2 91 220 ps
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, differential input voltage |VID| = 0.1V to 3.0V, input voltage (VIN, VIN) = 0 to VCC, input common-mode voltage
VCM = 0.05V to (VCC - 0.05V), LVPECL outputs terminated with 50Ω±1% to (VCC - 2.0V), LVDS outputs terminated with 100Ω±1%,
TA= -40°C to +85°C. Typical values are at VCC = +3.3V, |VID| = 0.2V, input common-mode voltage VCM = 1.2V, TA= +25°C, unless
otherwise noted.) (Notes 2, 3, 4)
-40°C +25°C +85°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
UNITS
Output Short-circuit
Current, Outputs Shorted
Together
|IOSAB|
VID = ±100mV,
VOUT_+ = VOUT_- 4.0 12 4.0 12 4.0 12 mA
SUPPLY
Supply Current ICC
All pins open
except VCC and
GND with LVDS
outputs (OUT2,
OUT2) loaded
with differential
100Ω
24 40 29 40 31 40 mA
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
4 _______________________________________________________________________________________
SUPPLY CURRENT
vs. FREQUENCY
MAX9376 toc01
FREQUENCY (MHz)
SUPPLY CURRENT (mA)
15001000500
10
20
30
40
50
0
02000
LVPECL OUTPUTS
UNLOADED
OUTPUT AMPLITUDE
vs. FREQUENCY
MAX9376 toc02
FREQUENCY (MHz)
OUTPUT AMPLITUDE (mV)
15001000500
400
500
600
700
800
900
300
02000
LVPECL
LVDS
PROPAGATION DELAY
vs. TEMPERATURE
MAX9376 toc03
TEMPERATURE (°C)
PROPAGATION DELAY (ps)
603510-15
320
340
360
380
400
420
440
460
480
500
300
-40 85
tPLH (LVPECL) tPHL (LVPECL)
tPLH (LVDS)
tPHL (LVDS)
OUTPUT RISE/FALL TIME
vs. TEMPERATURE
MAX9376 toc04
TEMPERATURE (°C)
OUTPUT RISE/FALL TIME (ps)
603510-15
80
90
100
110
120
130
140
70
-40 85
tR (LVPECL)
tF (LVPECL)
tF (LVDS)
tR (LVPECL)
Typical Operating Characteristics
(VCC = +3.3V, differential input voltage |VID| = 0.2V, VCM = 1.2V, input frequency = 500MHz, LVPECL outputs terminated with 50Ω
±1% to VCC - 2.0V, LVDS outputs terminated with 100Ω±1%, TA= +25°C, unless otherwise noted.)
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, differential input voltage |VID| = 0.1V to 1.2V, input frequency ≤1.34GHz, differential input transition time =
125ps (20% to 80%), input voltage (VIN, VIN) = 0 to VCC, input common-mode voltage (VCM) = 0.05V to (VCC - 0.05V), LVPECL out-
puts terminated with 50Ω±1% to (VCC - 2.0V), LVDS outputs terminated with 100Ω±1%, TA = -40°C to +85°C. Typical values are at
VCC = +3.3V, |VID| = 0.2V, input common-mode voltage VCM = 1.2V, TA= +25°C, unless otherwise noted.) (Note 5)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Added Random Jitter tRJ fIN = 1.34GHz (Note 7) 0.8 2 ps
(
RMS
)
Note 2: Measurements are made with the device in thermal equilibrium. All voltages are referenced to ground except VTHD, VID,
VOD, and ΔVOD.
Note 3: Current into a pin is defined as positive. Current out of a pin is defined as negative.
Note 4: DC parameters production tested at TA= +25°C and guaranteed by design and characterization over the full operating
temperature range.
Note 5: Guaranteed by design and characterization, not production tested. Limits are set at ±6 sigma.
Note 6: tSKEW is the magnitude difference of differential propagation delays for the same output under same conditions; tSKEW =
|tPHL - tPLH|.
Note 7: Device jitter added to the input signal.
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
_______________________________________________________________________________________ 5
Pin Description
PIN NAME FUNCTION
1 IN1 Differential LVDS/Anything Noninverting Input 1
2IN1 Differential LVDS/Anything Inverting Input 1
3 OUT2 Differential LVDS Noninverting Output 2. Terminate with 100Ω ±1% to OUT2.
4OUT2 Differential LVDS Inverting Output 2. Terminate with 100Ω ±1% to OUT2.
5 GND Ground
6IN2 Differential LVDS/Anything Inverting Input 2
7 IN2 Differential LVDS/Anything Noninverting Input 2
8OUT1 Differential LVPECL Inverting Output. Terminate with 50Ω ±1% to VCC - 2V.
9 OUT1 Differential LVPECL Noninverting Output. Terminate with 50Ω ±1% to VCC - 2V.
10 VCC
Positive Supply. Bypass from VCC to GND with 0.1µF and 0.01µF ceramic capacitors. Place
the capacitors as close to the device as possible with the smaller value capacitor closest to
the device.
Detailed Description
The MAX9376 is a fully differential, high-speed,
LVDS/anything-to-LVPECL/LVDS dual translator
designed for signal rates up to 2GHz. One channel is
LVDS/anything-to-LVPECL translator and the other
channel is LVDS/anything-to-LVDS translator. The
MAX9376’s extremely low propagation delay and high
speed make it ideal for various high-speed network
routing and backplane applications.
The MAX9376 accepts any differential input signal with-
in the supply rails and with a minimum amplitude of
100mV. Inputs are fully compatible with the LVDS,
LVPECL, HSTL, and CML differential signaling stan-
dards. LVPECL outputs have sufficient current to drive
50Ωtransmission lines. LVDS outputs conform to the
ANSI EIA/TIA-644 LVDS standard.
Inputs
Inputs have a wide common-mode range of 0.05V to
VCC - 0.05V, which accommodates any differential sig-
nals within rails, and requires a minimum of 100mV to
switch the outputs. This allows the MAX9376 inputs to
support virtually any differential signaling standard.
LVPECL Outputs
The MAX9376 LVPECL outputs are emitter followers
that require external resistive paths to a voltage source
(VT = VCC - 2.0V typ) more negative than worst-case
VOL for proper static and dynamic operation. When
properly terminated, the outputs generate steady-state
voltage levels, VOL or VOH with fast transition edges
between state levels. Output current always flows into
the termination during proper operation.
LVDS Outputs
The MAX9376 LVDS outputs require a resistive load to
terminate the signal and complete the transmission
loop. Because the device switches current and not volt-
age, the actual output voltage swing is determined by
the value of the termination resistor. With a 3.5mA typi-
cal output current, the MAX9376 produces an output
voltage of 350mV when driving a 100Ωload.
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
6 _______________________________________________________________________________________
Applications Information
LVPECL Output Termination
Terminate the MAX9376 LVPECL outputs with 50Ωto
(VCC - 2V) or use equivalent Thevenin terminations.
Terminate OUT1 and OUT1 with identical termination
on each for low output distortion. When a single-ended
signal is taken from the differential output, terminate
both OUT1 and OUT1.
Ensure that output currents do not exceed the current
limits as specified in the
Absolute Maximum Ratings
.
Under all operating conditions, the device’s total ther-
mal limits should be observed.
LVDS Output Termination
The MAX9376 LVDS outputs are current-steering
devices; no output voltage is generated without a termi-
nation resistor. The termination resistors should match
the differential impedance of the transmission line.
Output voltage levels are dependent upon the value of
the termination resistor. The MAX9376 is optimized for
point-to-point interface with 100Ωtermination resistors
at the receiver inputs. Termination resistance values
may range between 90Ωand132Ω, depending on the
characteristic impedance of the transmission medium.
Supply Bypassing
Bypass VCC to ground with high-frequency surface-
mount ceramic 0.1µF and 0.01µF capacitors. Place the
capacitors as close to the device as possible with the
0.01µF capacitor closest to the device pins.
Traces
Circuit board trace layout is very important to maintain
the signal integrity of high-speed differential signals.
Maintaining integrity is accomplished in part by reduc-
ing signal reflections and skew, and increasing com-
mon-mode noise immunity.
Signal reflections are caused by discontinuities in the
50Ωcharacteristic impedance of the traces. Avoid dis-
continuities by maintaining the distance between differ-
ential traces, not using sharp corners or using vias.
Maintaining distance between the traces also increases
common-mode noise immunity. Reducing signal skew
is accomplished by matching the electrical length of
the differential traces.
VCM (MAX)
VCC
GND
VID
VCM (MIN)
VID
80%
OUT2 - OUT2
20% 20%
80%
0V
tF
tR
DRV OUT2
OUT2 RL / 2
RL / 2
VOD
VOD(+)
VOD(-)
VOS
GND
CL
CL
Figure 1. Input Definition
tPHL
tPLH
80%
20% 20%
80%
DIFFERENTIAL OUTPUT
WAVEFORM
VID OR (VIH - VIL)
VOD OR (VOH - VOL)
+VOD OR +(VOH - VOL)
-VOD OR -(VOH - VOL)
0V DIFFERENTIAL
VOH
VOL
0V DIFFERENTIAL
IN
IN
OUT
OUT
OUT - OUT
tF
tR
Figure 2. LVDS Output Load and Transition Times
Figure 3. Differential Input-to-Output Propagation Delay Timing
Diagram
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
_______________________________________________________________________________________ 7
Chip Information
PROCESS: Bipolar
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in
the package code indicates RoHS status only. Package draw-
ings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
10µMAX U10+2 21-0061
MAX9376
LVDS/Anything-to-LVPECL/LVDS Dual Translator
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8
_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 4/03 Initial release —
1 10/09 Updated Ordering Information and Absolute Maximum Ratings 1, 2