MAX9376EUB+T - Maxim Integrated Products, Inc.

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

VCC

OUT1

IN2OUT2

OUT2

IN1

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 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|

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

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

100

110

120

130

140

-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%

DRV OUT2

OUT2 RL / 2

RL / 2

VOD

VOD(+)

VOD(-)

VOS

GND

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

OUT

OUT - OUT

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.

_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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