MAXIM MAX9370, MAX9371, MAX9372 User Manual

General Description

The MAX9370/MAX9371/MAX9372 LVTTL/TTL-to-differ­ential LVPECL/PECL translators are designed for high­speed communication signal and clock driver
applications. The MAX9370/MAX9372 are dual
LVTTL/TTL-to-LVPECL/PECL translators that operate in
excess of 1GHz. The MAX9371 is a single translator.
The MAX9370/MAX9371 operate over a wide 3.0V to

5.25V supply range, allowing high-performance clock
or data distribution in systems with a nominal 3.3V or

5.0V supply. The MAX9372 is designed to operate from

3.0V to 3.6V.

The devices default to output high if the input is discon­nected. They feature low 270ps propagation delay. The
MAX9370/MAX9371/MAX9372 employ industry-stan­dard flow-through pinouts. These devices are specified
for operation from -40°C to +85°C, and are offered in
space-saving, 8-pin SOT23, µMAX, and SO packages.

Applications

Precision Clock/Data Level Translation

Central Office Clock Distribution

DSLAM/DLC

Base Station

Mass Storage

Features

♦ Guaranteed 1GHz Operating Frequency at 600mV

Differential Output

♦ 270ps Propagation Delay

♦ 10ps Output-to-Output Skew (MAX9370/MAX9372)

♦ Wide Supply Range: 3.0V to 5.25V

(MAX9370/MAX9371)

♦ ESD Protection > 2kV (Human Body Model)

♦ Output High with Input Open

♦ Available in Small 8-Pin SOT23, µMAX, and SO

Packages

♦ Improved Upgrades to MC100EL22, MC100EPT20,

MC100EPT22

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL

Translators

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

MAX9370
MAX9371
MAX9372

TTL/LVTTL

INPUT

Q_

D

Q_

Z

0

= 50Ω

Z

0

= 50Ω

50Ω

50Ω

PECL/LVPECL

RECEIVER

VCC - 2.0V

Typical Operating Circuit

19-2377; Rev 0; 4/02

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX9370EKA-T* -40°C to +85°C 8 SOT23-8

MAX9370EUA* -40°C to +85°C 8 µMAX

MAX9370ESA -40°C to +85°C 8 SO

MAX9371EKA-T* -40°C to +85°C 8 SOT23-8

MAX9371EUA* -40°C to +85°C 8 µMAX

MAX9371ESA -40°C to +85°C 8 SO

MAX9372EKA-T* -40°C to +85°C 8 SOT23-8

MAX9372EUA* -40°C to +85°C 8 µMAX

MAX9372ESA -40°C to +85°C 8 SO

*Future product—contact factory for availability.

Pin Configurations/Functional Diagrams appears at end of
data sheet.

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL
Translators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

VCCto GND (MAX9370/MAX9371) .......................-0.3V to +5.5V

V

CC

to GND (MAX9372)........................................-0.3V to +4.0V

D_ to GND ..................................................-0.3V to (V

CC

+ 0.3V)

Q_,

Q_ to GND ...........................................-0.3V to (VCC+ 0.3V)

Continuous Output Current ................................................50mA

Surge Output Current........................................................100mA

Junction-to-Ambient Thermal Resistance in Still Air

8-Pin SOT23..............................................................+112°C/W

8-Pin µMAX…............................................................+221°C/W

8-Pin SO....................................................................+170°C/W

Junction-to-Ambient Thermal Resistance with
500LFPM Airflow

8-Pin SOT23................................................................+78°C/W

8-Pin µMAX…............................................................+155°C/W

8-Pin SO......................................................................+99°C/W

Junction-to-Case Thermal Resistance

8-Pin SOT23................................................................+80°C/W

8-Pin µMAX…..............................................................+39°C/W

8-Pin SO......................................................................+40°C/W

Continuous Power Dissipation (T

A

= +70°C)

8-Pin SO (derate 5.9mW/°C above +70°C)...................470mW

8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW

8-Pin SOT23 (derate 8.9mW/°C above +70°C).............714mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature .....................................................+150°C

Storage Temperature Range .............................-60°C to +150°C

Soldering Temperature (10s) ...........................................+300°C

DC ELECTRICAL CHARACTERISTICS

(VCC= 3.0V to 5.25V for MAX9370/MAX9371, VCC= 3.0V to 3.6V for MAX9372, outputs terminated with 50Ω ±1% to VCC- 2.0V.
Typical values are at V

CC

= 3.3V, V

IH

= 2.4V, VIL= 0.4V, unless otherwise noted.) (Notes 1, 2, 3)

-40°C +25°C +85°C

PARAMETER

SYMBOL

CONDITIONS

UNITS

LVTTL INPUTS (D_)

Input High
Voltage

V

IH

V

Input Low
Voltage

V

IL

V

Input Low
Current

I

IL

VD = 0.5V

µA

VD = 2.7V

VD = VCC,
MAX9370/
MAX9371

Input High
Current

I

IH

VD = VCC,
MAX9372

20 20 20

µA

Input Clamp
Voltage

V

LVPECL/PECL OUTPUTS (Q_, Q_)

MAX9370

Output High
Voltage

V

OH

MAX9371/
MAX9372

V

MAX9370

Output Low
Voltage

V

OL

MAX9371/
MAX9372

V

MIN TYP MAX MIN TYP MAX MIN TYP MAX

2.0 2.0 2.0

IIL or IIH = 18mA -1.2 -1.2 -1.2

-50 +10 -50 +10 -50 +10

V

-

CC

1.085

V

-

CC

1.145

V

-

CC

1.83

V

-

CC

1.945

0.8 0.8 0.8

-100 -100 -100

130 130 130

V

-

V

CC

0.895

V

CC

0.895

V

CC

1.62

V

CC

1.695

-

CC

1.025

-

V

-

CC

1.145

-

V

-

CC

1.81

-

V

-

CC

1.945

V

CC

0.895

V

CC

0.895

V

CC

1.62

V

CC

-1.695

-

V

-

CC

1.025

-

V

-

CC

1.145

-

V

-

CC

1.81

-

V

-

CC

1.945

V

CC

0.895

V

CC

0.895

V

CC

1.62

V

CC

1.695

-

-

-

-

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL

Translators

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= 3.0V to 5.25V for MAX9370/MAX9371, VCC= 3.0V to 3.6V for MAX9372, outputs terminated with 50Ω ±1% to VCC- 2.0V.
Typical values are at V

CC

= 3.3V, V

IH

= 2.4V, VIL= 0.4V, unless otherwise noted.) (Notes 1, 2, 3)

-40°C

+25°C

+85°C

PA R A M ET ER

SYMBOL

CONDITIONS

UNITS

Differential
Output Swing
(V

OH

- VOL)

mV

SUPPLY CURRENT

MAX9370/
MAX9372

18 28

28 22 28

Power-Supply

Current
(Note 4)

I

CC

MAX9371

16

16

16

mA

AC ELECTRICAL CHARACTERISTICS

(VCC= 3.0V to 5.25V for MAX9370/MAX9371, VCC= 3.0V to 3.6V for MAX9372, outputs terminated with 50Ω ±1% to VCC- 2.0V, input
frequency ≤ 1.0GHz, input transition time = 125ps (20% to 80%), V

IH

= 2.0V, VIL= 0.8V. Typical values are at VCC= 3.3V, VIH=

2.4V, V

IL

= 0.4V, unless otherwise noted.) (Note 5)

-40°C +25°C +85°C

PARAMETER

SYMBOL

CONDITIONS

UNITS

Maximum
Toggle
Frequency

f

MAX

VOH - VOL ≥
600mV

GHz

Input-to­Output
Propagation
Delay

t

PLH

,

t

PHL

Figure 1

ps

Output-to-

Output Skew

t

SKQQ

MAX9370/
MAX9372
(Note 6)

10 50 7 50 7 50 ps

Output Rise/
Fall Time

t

R

, t

F

Figure 1 80

80

ps

Added
Deterministic
Jitter

t

DJ

1Gbps 223 - 1
PRBS pattern
(Note 7)

40 60

60 40 60

ps

(P-P)

Added

Random Jitter

t

RJ

1GHz clock
(Note 7)

ps

(RMS)

Note 1: Measurements are made with the device in thermal equilibrium.
Note 2: Current into a pin is defined as positive. Current out of a pin is defined as negative.
Note 3: DC parameters are production tested at T

A

= +25°C. DC limits are guaranteed by design and characterization over the full

operating temperature range.

Note 4: All pins are open except V

CC

and GND.

Note 5: Guaranteed by design and characterization. Limits are set to ±6 sigma.
Note 6: Measured between outputs of the same part at the signal crossing points under identical conditions for a same-edge transition.
Note 7: Device jitter added to the input signal.

MIN TYP MAX MIN TYP MAX MIN TYP MAX

600 600 600

20

9.5

10.5

11.5

MIN TYP MAX MIN TYP MAX MIN TYP MAX

1.0 1.5 1.0 1.5 1.0 1.5

200 270 400 200 270 400 200 270 400

250 80 250

0.23 0.8 0.23 0.8 0.23 0.8

40

250

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL
Translators

4 _______________________________________________________________________________________

Typical Operating Characteristics

(MAX9371, VCC= 3.3V, VIH= 2.4V, VIL= 0.4V, outputs terminated with 50Ω to VCC- 2V, input transition time = 125ps (20% to 80%),
TA= +25°C, unless otherwise noted.)

SUPPLY CURRENT vs. TEMPERATURE

MAX9370 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

603510-15

10

14

18

22

26

6

-40 85

ALL INPUTS AND OUTPUTS ARE OPEN

MAX9370/MAX9372

MAX9371

DIFFERENTIAL OUTPUT VOLTAGE

(V

OH

- VOL) vs. FREQUENCY

MAX9370 toc02

FREQUENCY (GHz)

DIFFERENTIAL OUTPUT VOLTAGE (mV)

1.61.20.80.4

200

400

600

800

1000

0

02.0

TRANSITION TIME vs. TEMPERATURE

MAX9370 toc03

TEMPERATURE (°C)

TRANSITION TIME (ps)

603510-15

200

220

240

260

180

-40 85

f = 100MHz

FALLING EDGE

RISING EDGE

PROPAGATION DELAY vs. TEMPERATURE

MAX9370 toc04

TEMPERATURE (°C)

PROPAGATION DELAY (ps)

603510-15

250

260

270

280

290

300

240

-40 85

Detailed Description

The MAX9370/MAX9371/MAX9372 LVTTL/TTL-to-differ­ential LVPECL/PECL translators are designed for high­speed communication signal and clock driver
applications. The MAX9370/MAX9372 are dual LVTTL­to-LVPECL/PECL translators that operate in excess of
1GHz. The MAX9371 is a single translator. The
MAX9370/MAX9371 operate over a wide 3.0V to 5.25V
supply range, allowing high-performance clock or data
distribution in systems with a nominal 3.3V or 5.0V sup­ply. The MAX9372 is optimized for 3.0V to 3.6V opera­tion. These devices feature low 270ps propagation
delay and 40ps peak-to-peak deterministic jitter.

Inputs and Outputs

The MAX9370/MAX9371/MAX9372 inputs accept stan­dard LVTTL/TTL levels. The input has pullup circuitry that
drives the outputs to a differential high if the inputs are
open. The outputs are differential LVPECL/PECL levels.

Applications Information

Output Termination

Terminate outputs with 50Ω to VCC- 2V or use an equiv­alent Thevenin termination. Use the same terminate on
each output for the lowest output-to-output skew. When a
single-ended signal is taken from a differential output,
terminate both outputs. For example, if Q is used as a
single-ended output, terminate both Q and Q.

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL

Translators

_______________________________________________________________________________________ 5

Pin Description for the MAX9370/MAX9372

PIN

SO

FUNCTION

1 8 Q0 Noninverting Differential LVPECL/PECL Output 0. Typically terminate with 50Ω resistor to V

CC

- 2V.

27Q0 Inverting Differential LVPECL/PECL Output 0. Typically terminate with 50Ω resistor to V

CC

- 2V.

3 6 Q1 Noninverting Differential LVPECL/PECL Output 1. Typically terminate with 50Ω resistor to V

CC

- 2V.

45Q1 Inverting Differential LVPECL/PECL Output 1. Typically terminate with 50Ω resistor to V

CC

- 2V.

52

Ground. Provide a low-impedance connection to ground plane.

6 4 D1 LVTTL/TTL Input 1. LVTTL/TTL input for translator corresponding to output Q1 and Q1.
7 3 D0 LVTTL/TTL Input 0. LVTTL/TTL input for translator corresponding to output Q0 and Q0.

81V

CC

Positive Supply Voltage. Bypass 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.

Pin Description for the MAX9371

PIN

SO

µMAX

FUNCTION

1, 4, 6

No Connection. No internal connection.

2 7 Q Noninverting Differential LVPECL/PECL Output. Typically terminate with 50Ω resistor to V

CC

- 2V.

36Q Inverting Differential LVPECL/PECL Output. Typically terminate with 50Ω resistor to V

CC

- 2V.

52

Ground. Provide a low-impedance connection to ground plane.

7 3 D LVTTL/TTL Input

81

Positive Supply Voltage. Bypass 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.

µMAX

SOT23

SOT23

4, 5, 8 N.C.

NAME

GND

NAME

GND

V

CC

MAX9370/MAX9371/MAX9372

Ensure that the output currents do not exceed the con­tinuous safe output current limit or surge output current
limit as specified in the Absolute Maximum Ratings
table. Under all operating conditions, the device’s total
thermal limits should be observed.

Supply Bypassing

Bypass VCCto GND with high-frequency surface-mount
ceramic 0.1µF and 0.01µF capacitors in parallel and as
close to the device as possible, with the 0.01µF capaci­tor closest to the device. Use multiple parallel vias to
minimize parasitic inductance.

PC Board Traces

Input and output trace characteristics affect the perfor­mance of the MAX9370/MAX9371/MAX9372. Connect
each differential output to a 50Ω characteristic impedance
trace. Minimize the number of vias to prevent impedance
discontinuities. Reduce reflections by maintaining the 50Ω
characteristic impedance through connectors and across
cables. Reduce skew within a differential pair by match­ing the electrical length of the traces.

Chip Information

TRANSISTOR COUNT: 358

PROCESS: Bipolar

LVTTL/TTL-to-Differential LVPECL/PECL
Translators

6 _______________________________________________________________________________________

D_

0V (DIFFERENTIAL)

20%

80%

20%

80%

t

R

t

F

Q_

Q_

Q_ - Q_

V

IH

V

IL

50%

t

PLH

50%

V

OH

V

OL

VOH - V

OL

VOH - V

OL

VOH - V

OL

t

PHL

Figure 1. Input-to-Output Propagation Delay and Transition Timing Diagram

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL

Translators

_______________________________________________________________________________________ 7

1

N.C.

2

Q

3

4

N.C.

Q

8

V

CC

7

D

6

5

GND

N.C.

SO/µMAX

MAX9371

1

V

CC

2

GND

3

4

N.C.

D

8

N.C.

7

Q

6

5

N.C.

Q

SOT23

MAX9371

1

Q0

2

Q0

3

4

Q1

Q1

8

V

CC

7

D0

6

5

GND

D1

SO/µMAX

MAX9370/MAX9372

1

V

CC

2

GND

3

4

D1

D0

8

Q0

7

Q0

6

5

Q1

Q1

SOT23

MAX9370/MAX9372

Pin Configurations/Functional Diagrams

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL
Translators

8 _______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)

SOT23, 8L.EPS

8LUMAXD.EPS

PACKAGE OUTLINE, 8L uMAX/uSOP

1

1

21-0036

J

REV.DOCUMENT CONTROL NO.APPROVAL

PROPRIETARY INFORMATION

TITLE:

MAX

0.043

0.006

0.014

0.120

0.120

0.198

0.026

0.007

0.037

0.0207 BSC

0.0256 BSC

A2

A1

c

e

b

A

L

FRONT VIEW

SIDE VIEW

E H

0.6±0.1

0.6±0.1

ÿ 0.50±0.1

1

TOP VIEW

D

8

A2

0.030

BOTTOM VIEW

1

6∞

S

b

L

H

E

D
e

c

0∞

0.010

0.116

0.116

0.188

0.016

0.005

8

4X S

INCHES

-

A1

A

MIN

0.002

0.950.75

0.5250 BSC

0.25 0.36

2.95 3.05

2.95 3.05

4.78

0.41

0.65 BSC

5.03

0.66
6∞0∞

0.13 0.18

MAX

MIN

MILLIMETERS

- 1.10

0.05 0.15

α

α

DIM

MAX9370/MAX9371/MAX9372

LVTTL/TTL-to-Differential LVPECL/PECL

Translators

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 _____________________ 9

© 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)

9LUCSP, 3x3.EPS