MAXIM MAX9321B User Manual

General Description

The MAX9321B low-skew differential receiver/driver is
designed for clock and data distribution. The differen­tial input can be adapted to accept a single-ended
input by connecting the on-chip VBBsupply to an input
as a reference voltage.

The MAX9321B features ultra-low propagation delay
(172ps) and part-to-part skew (20ps) with 24mA maxi­mum supply current, making this device ideal for clock
buffering or repeating. For interfacing to differential PECL
and LVPECL signals, these devices operate over a +3.0V
to +5.5V supply range, allowing high-performance clock
and data distribution in systems with a nominal 3.3V or

5.0V supply. For differential ECL and LVECL operation,
this device operates from a -3.0V to -5.5V supply.

The MAX9321B is offered in industry-standard 8-pin SO
and TSSOP packages.

Applications

Precision Clock Buffer

Low-Jitter Data Repeater

Features

♦ Improved Second Source of the MC10EP16D

♦ +3.0V to +5.5V Differential PECL/LVPECL

Operation

♦ -3.0V to -5.5V Differential ECL/LVECL Operation

♦ Low 17mA Supply Current

♦ 20ps Part-to-Part Skew

♦ 172ps Propagation Delay

♦ Minimum 300mV Output at 3GHz

♦ Output Low for Open Input

♦ ESD Protection >2kV (Human Body Model)

♦ On-Chip Reference for Single-Ended Input

MAX9321B

Differential PECL/ECL/LVPECL/LVECL

Receiver/Driver

6

TSSOP/SO

N.C.

1

2

3

4

8

Q

5

V

EE

7

Q

V

CC

MAX9321B

V

BB

D

D

50kΩ

100kΩ

60kΩ

80kΩ

V

CC

Pin Configuration

19-2384; Rev 0; 4/02

Ordering Information

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.

*Future product—contact factory for availability.

Figure 1. Switching with Single-Ended Inputs

________________________________________________________________ Maxim Integrated Products 1

PART TEMP RANGE PIN-PACKAGE

MAX9321BESA -40°C to +85°C 8 SO

MAX9321BEUA* -40°C to +85°C 8 TSSOP

D

D

Q

Q

V

IL

V

- V

OH

OL

V

IH

V

(CONNECTED TO D)

V

V

BB

OH

OL

MAX9321B

Differential PECL/ECL/LVPECL/LVECL
Receiver/Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC- VEE= 3.0V to 5.5V, outputs loaded with 50Ω ±1% to VCC- 2.0V. Typical values are at VCC- VEE= 5.0V, V

IHD

= VCC- 1V, V

ILD

= VCC- 1.5V, unless otherwise noted.) (Notes 1, 2, 3)

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 VEE.............................................................................6.0V

D or D ...................................................V

EE

- 0.3V to VCC+ 0.3V

D or D with the Other Input Floating ....V

CC

- 5.0V to VCC+ 0.3V

D to D .................................................................................±3.0V

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

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

V

BB

Sink/Source Current .................................................±0.6mA

Continuous Power Dissipation (T

A

+70°C)

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

8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW

Junction-to-Ambient Thermal Resistance in Still Air

8-Pin TSSOP ............................................................+221°C/W

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

Junction-to-Ambient Thermal Resistance with
500 LFPM Airflow

8-Pin TSSOP ............................................................+155°C/W

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

Junction-to-Case Thermal Resistance

8-Pin TSSOP ..............................................................+39°C/W

8-Pin SO.....................................................................+40°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 (D, D, Q_, Q_) .................................>2kV

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

-40°C +25°C +85°C

PARAMETER

CONDITIONS

UNITS

DIFFERENTIAL INPUT (D, D)

Single-Ended
Input High
Voltage

V

IH

VBB connected to D
(V

IL

for V

BB

connected to D),
Figure 1

V

CC

-

1.21

VCC -

1.145

VCC -

1.085

V

Single-Ended
Input Low
Voltage

V

IL

VBB connected to D
(V

IH

for V

BB

connected to D),
Figure 1 (Note 4)

V

EE

VCC -

V

High Voltage of
Differential
Input

VEE +

1.2

VEE +

1.2

VEE +

1.2

V

Low Voltage of
Differential
Input

V

ILD

V

EE

V

EE

V

Differential
Input Voltage

V

IHD

-

V

ILD

0.1 3.0 0.1

0.1

V

Input High
Current

I

IH

µA

VCC - VEE ≤ 3.8V

D Input Low
Current

I

ILD

VCC - VEE ≥ 3.8V

µA

VCC - VEE ≤ 3.8V

D Input Low
Current

I

ILD

VCC - VEE ≥ 3.8V

µA

SYMBOL

MIN TYP MAX MIN TYP MAX MIN TYP MAX

V

IHD

V

CC

V

EE

V

EE

-100 +100 -100 +100 -100 +100

-140 +140 -140 +140 -140 +140

-150 +150 -150 +150 -150 +150

-175 +175 -175 +175 -175 +175

VCC -

VCC -

V

1.61

V

150 150 150

EE

CC

0.1

V

CC

VCC -

1.545

V

CC

VCC -

0.1

3.0

V

CC

1.485

V

CC

VCC -

0.1

3.0

MAX9321B

Differential PECL/ECL/LVPECL/LVECL

Receiver/Driver

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC- VEE= 3.0V to 5.5V, outputs loaded with 50Ω ±1% to VCC- 2.0V. Typical values are at VCC- VEE= 5.0V, V

IHD

= VCC- 1V, V

ILD

= VCC- 1.5V, unless otherwise noted.) (Notes 1, 2, 3)

AC ELECTRICAL CHARACTERISTICS

(VCC- VEE= 3.0V to 5.5V, outputs loaded with 50Ω ±1% to VCC- 2V, input frequency ≤ 1.5GHz, input transition time = 125ps (20% to
80%), V

IHD

= VEE+ 1.2V to VCC, V

ILD

= VEEto VCC- 0.15V, V

IHD

- V

ILD

= 0.15V to 3.0V. Typical values are at VCC- VEE= 5V, V

IHD

=

V

CC

- 1V, V

ILD

= VCC- 1.5V, unless otherwise noted.) (Notes 1, 7)

PARAMETER SYMBOL CONDITIONS

DIFFERENTIAL OUTPUT (Q, Q)

Single-Ended
Output High
Voltage

Single-Ended
Output Low
Voltage

Differential
Output Voltage

REFERENCE (VBB)

Reference
Voltage Output

POWER SUPPLY

Supply Current

V

V

V

OH

V

V

I

Figure 1

OH

Figure 1

OL

­Figure 1 550 820 550 820 550 820 mV

OL

IBB = ±0.5mA

BB

(Note 5)

(Note 6) 16 24 17 24 18 24 mA

EE

-40°C +25°C +85°C

MIN TYP MAX MIN TYP MAX MIN TYP MAX

V

CC

1.135

V

CC

1.935

V

CC

1.51

-

-

-

VCC -

0.885

VCC -

1.68

VCC -

1.31

VCC -

1.07

VCC -

1.87

VCC -

1.445

VCC -

0.82

VCC -

1.62

VCC -

1.245

VCC -

1.01

VCC -

1.81

VCC -

1.385

V

CC

0.76

VCC -

1.56

VCC -

1.185

-

UNITS

V

V

V

PARAMETER SYMBOL CONDITIONS

Differential
Input-to­Output Delay

Part-to-Part
Skew

Added
Random Jitter

MIN TYP MAX MIN TYP MAX MIN TYP MAX

t

,

PLHD

t

PHLD

t

SKPP

t

Figure 2 145 184 235 145 172 245 130 167 230 ps

(Note 8) 25 90 20 100 20 100 ps

fIN = 1.5GHz, clock
pattern (Note 9)

RJ

fIN = 3.0GHz, clock
pattern (Note 9)

-40°C +25° C +85°C

1.7 2.8 1.7 2.8 1.7 2.8

0.6 1.5 0.6 1.5 0.6 1.5

UNITS

ps

(RMS)