MAXIM MAX9326 User Manual

General Description

The MAX9326 low-skew, 1:9 differential driver features
extremely low output-to-output skew (50ps max) and
part-to-part skew (225ps max). These features make
the device ideal for clock and data distribution across a
backplane or board. The device repeats an HSTL or
LVECL/LVPECL differential input at nine differential out­puts. Outputs are compatible with LVECL and LVPECL,
and directly drive 50Ω terminated transmission lines.

The differential inputs can be configured to accept a
single-ended signal when the unused complementary
input is connected to the on-chip reference output volt­age V

BB.

All inputs have internal pulldown resistors to

V

EE.

The internal pulldowns and a fail-safe circuit
ensure differential low default outputs when the inputs
are left open or at VEE.

The MAX9326 operates over a +2.375V to +3.8V supply
range for interfacing to differential HSTL and LVPECL
signals. This allows high-performance clock or data dis­tribution in systems with a nominal +2.5V or +3.3V sup­ply. For LVECL operation, the device operates with a

-2.375V to -3.8V supply.

The MAX9326 is offered in 28-lead PLCC and space­saving 28-lead QFN packages. The MAX9326 is speci­fied for operation from -40°C to +85°C.

Applications

Precision Clock Distribution

Low-Jitter Data Repeaters

Features

♦ 50ps (max) Output-to-Output Skew

♦ 1.5ps

RMS

(max) Random Jitter

♦ Guaranteed 300mV Differential Output at 1.0GHz

♦ +2.375V to +3.8V Supplies for Differential

HSTL/LVPECL

♦ -2.375V to -3.8V Supplies for Differential LVECL

♦ On-Chip Reference for Single-Ended Inputs

♦ Outputs Low for Inputs Open or at V

EE

♦ Pin Compatible with MC100LVE111

MAX9326

1:9 Differential LVPECL/LVECL/HSTL Clock and

Data Driver

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

Ordering Information

19-2538; Rev 2; 10/02

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.

Functional Diagram appears at end of data sheet.

MAX9326EQI -40°C to +85°C 28 PLCC

MAX9326EGI -40°C to +85°C 28 QFN 5mm x 5mm

PART TEMP RANGE PIN-PACKAGE

TOP VIEW

V

EE

N.C.

CLK

V

CC

CLK

V

BB

N.C.

Q0

Q1

Q0

26

27

28

1

2

3

4

MAX9326

567891011

Q7

Q8

Q8

PLCC

CC

V

22232425 192021

CC

V

Q2

Q2

Q1

Q3

18

Q3

17

Q4

16

V

15

CC

14

Q4

13

Q5

12

Q5

Q6

Q6

Q7

1

V

EE

2

N.C.

3

CLK

4

V

CC

5

CLK

6

V

BB

7

N.C.

*CORNER PINS AND EXPOSED PAD ARE CONNECTED TO V

Q1

Q0

28272625242322

8

Q8

VCCQ1

Q0

MAX9326

9

1011121314

CC

Q7

Q8

V

QFN*

Q7

Q2

Q2

Q3

21

Q3

20

Q4

19

18

V

CC

17

Q4

16

Q5

15

Q5

Q6

Q6

.

EE

MAX9326

1:9 Differential LVPECL/LVECL/HSTL Clock and
Data Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

((VCC- VEE) = 2.375V to 3.8V, RL= 50Ω±1% to V

CC

- 2V. Typical values are at (VCC- VEE) = 3.3V, VIH= (VCC- 1V), VIL= (VCC-

1.5V).) (Notes 1–4)

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- VEE...............................................................-0.3V to +4.1V

Inputs (CLK, CLK) to V

EE

...........................-0.3V to (V

CC

+ 0.3V)

CLK to CLK ........................................................................±3.0V

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

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

V

BB

Sink/Source Current................................................±0.65mA

Continuous Power Dissipation (T

A

= +70°C)

28-Lead PLCC (derate 10.5mW/°C above +70°C) .....842mW

θ

JA

in Still Air .............................................................+95°C/W

θ

JC

.............................................................................+25°C/W

28-Lead QFN (derate 20.8mW/°C above +70°C) .....1667mW

θ

JA

in Still Air .............................................................+48°C/W

θ

JC

...............................................................................+2°C/W

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

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

Storage Temperature Range .............................-65°C to +150°C

ESD Protection

Human Body Model (CLK, CLK, Q_, Q_) .........................≥2kV

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

PARAMETER SYMBOL CONDITIONS

DIFFERENTIAL INPUT (CLK_, CLK_)

Single-Ended
Input High

V

Figure 1

IH

Voltage

-40°C +25°C +85°C

MIN TYP MAX MIN TYP MAX MIN TYP MAX

V

CC

- 1.165

V

V

CC

CC

- 1.165

V

CC

V

CC

- 1.165

V

CC

UNITS

V

Single-Ended
Input Low
Voltage

Differential Input
High Voltage

Differential Input
Low Voltage

Differential Input

V

Voltage

Input Current I

V

V

V

V

IHD

ILD

IHD

ILD

IN

Figure 1 V

IL

Figure 1

Figure 1 V

(V

CC

3.0V, Figure 1

-

(VCC - VEE) ≥

3.0V, Figure 1

V

IH, VIL

V

ILD

- V

, V

EE

) <

IHD

EE

V

EE

+ 1.2

EE

0.095

V

CC

- 1.475

V

CC

V

CC

- 0.095

V

CC

- V

EE

V

EE

V

EE

+ 1.2

V

EE

0.095

V

CC

- 1.475

V

CC

V

CC

- 0.095

V

CC

- V

EE

V

EE

V

EE

+ 1.2

V

EE

0.095

0.095 3.0 0.095 3.0 0.095 3.0

,

-10.0 +150.0 -10.0 +150.0 -10.0 +150.0 µA

VCC

- 1.475

V

CC

V

CC

- 0.095

V

CC

- VEE

V

V

V

V

MAX9326

1:9 Differential LVPECL/LVECL/HSTL Clock and

Data Driver

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

((VCC- VEE) = 2.375V to 3.8V, RL= 50Ω±1% to V

CC

- 2V. Typical values are at (VCC- VEE) = 3.3V, VIH= (VCC- 1V), VIL= (VCC-

1.5V).) (Notes 1–4)

PARAMETER SYMBOL CONDITIONS

OUTPUT (Q_, QQQQ____)

Single-Ended
Output High

V

OH

Figure 2

Voltage

Single-Ended
Output Low

V

OL

Figure 2

Voltage

Differential
Output Voltage

- VOLFigure 2 535 718 595 749 595 769 mV

V

OH

REFERENCE VOLTAGE OUTPUT (VBB)

Reference
Voltage Output

V

BB

IBB = ±0.5mA
(Note 5)

SUPPLY

Supply Current I

(Note 6) 35 50 39 55 42 65 mA

EE

-40°C +25°C +85°C

MIN TYP MAX MIN TYP MAX MIN TYP MAX

V

- 1.085

V

- 1.810

V

- 1.38

CC

CC

CC

V

CC

- 0.977

V

CC

- 1.695

V

CC

- 1.318

V

CC

- 0.880

V

CC

- 1.620

V

CC

- 1.26

V

CC

- 1.025

V

CC

- 1.810

V

CC

- 1.38

V

CC

- 0.949

V

CC

- 1.697

V

CC

- 1.325

V

CC

- 0.88

V

CC

- 1.62

V

CC

- 1.26

V

CC

- 1.025

V

CC

- 1.810

V

CC

- 1.38

V

CC

- 0.929

V

CC

- 1.698

V

CC

- 1.328

V

CC

- 0.88

V

CC

- 1.62

V

CC

- 1.26

UNITS

V

V

V

MAX9326

1:9 Differential LVPECL/LVECL/HSTL Clock and
Data Driver

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS–PLCC Package

((VCC- VEE) = 2.375V to 3.8V, RL= 50Ω±1% to V

CC

- 2V, fIN≤ 500MHz, input transition time = 125ps (20% to 80%). Typical values

are at (V

CC

- VEE) = 3.3V, VIH= V(VCC- 1V), VIL= (VCC- 1.5V).) (Note 7)

PARAMETER SYMBOL CONDITIONS

Differential
Input-to-Output
Delay

Single-Ended
Input-to-Output
Delay

t

PLHD

t

PHLD

t

PLH

t

PHL

Figure 2 365 615 375 605 383 653 ps

Figure 3 (Note 8) 350 635 360 685 360 705 ps

-40°C +25°C +85°C

MIN TYP MAX MIN TYP MAX MIN TYP MAX

UNITS

Output-to­Output Skew

Part-to-Part
Skew

Added Random
Jitter

Added
Deterministic
Jitter

Switching
Frequency

Output Rise/Fall
Time (20% to
80%)

t

SKOO

t

SKPP

t

t

f

MAX

t

R

(Note 9) 50 50 50 ps

Differential input
(Note 10)

fIN = 0.5GHz
clock pattern

RJ

(Note 11)

fIN = 1.0Gbps,

23

- 1 PRBS

2E

DJ

pattern (Note 11)

OL

≥

1.5 1.5 1.5 GHz

VOH - V
300mV clock
pattern

, tFFigure 2 140 440 140 440 140 440 ps

190 125 240 ps

1.5 1.5 1.5 ps

95 95 95 ps

RMS

P-P