MAXIM MAX9315 User Manual

19-2220; Rev 1; 11/04

General Description

The MAX9315 low-skew, 1-to-5 differential driver is designed for clock and data distribution. This device allows selection between two inputs. The selected input is reproduced at five differential outputs. The differential inputs can be adapted to accept a single-ended input by connecting the on-chip VBBsupply to one input as a reference voltage.

The MAX9315 features low output-to-output skew (20ps), making it ideal for clock and data distribution across a backplane or a board. For interfacing to differential HSTL and LVPECL signals, this device operates over a +2.375V to +3.8V supply range, allowing highperformance clock or data distribution in systems with a nominal +2.5V or +3.3V supply. For differential LVECL operation, this device operates with a -2.375V to -3.8V supply.

The MAX9315 is offered in a space-saving 20-pin TSSOP package.

Applications

Precision Clock Distribution Low-Jitter Data Repeater Data and Clock Driver and Buffer Central Office Backplane Clock Distribution DSLAM Backplane Base Station ATE

Features

♦ +2.375V to +3.8V Supply for Differential

HSTL/LVPECL Operation

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

Operation

♦ Two Selectable Differential Inputs ♦ Synchronous Output Enable/Disable ♦ 20ps Output-to-Output Skew ♦ 360ps Propagation Delay ♦ Guaranteed 400mV Differential Output at 1.5GHz ♦ On-Chip Reference for Single-Ended Inputs ♦ Input Biased Low when Left Open ♦ Pin Compatible with MC100LVEP14

MAX9315

1:5 Differential LVPECL/LVECL/HSTL

Clock and Data Driver

________________________________________________________________ Maxim Integrated Products 1

CLK1Q1

TOP VIEW

CLK1

CLK0

CLK0Q3

SEL

MAX9315

TSSOP

Pin Configuration

Ordering Information

50Ω 50Ω

MAX9315

ZO = 50Ω

= 50Ω

RECEIVER

VTT = VCC - 2.0V

Typical Application Circuit

EVALUATION KIT

AVAILABLE

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

MAX9315EUP -40°C to +85°C 20 TSSOP

Functional Diagram appears at end of data sheet.

MAX9315

1:5 Differential LVPECL/LVECL/HSTL Clock and Data Driver

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC- VEE= 2.375V to 3.8V, outputs loaded with 50Ω ±1% to VCC- 2V, SEL = high or low, EN = low, unless otherwise noted. Typical

values are at V

- VEE= +3.3V, V

IHD

= VCC- 1V, V

ILD

= VCC- 1.5V.) (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.

VCC- VEE...............................................................................4.1V

Inputs (CLK_, CLK_, SEL, EN)

to V

...........................................(VEE- 0.3V) to (VCC+ 0.3V)

CLK_ to CLK_ ....................................................................±3.0V

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

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

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

Continuous Power Dissipation (T

= +70°C) Single-Layer PC Board

20-Pin TSSOP (derate 7.69mW/°C above +70°C) .......615mW

Multilayer PC Board

20-Pin TSSOP (derate 10.9mW/°C above +70°C) .......879mW

Junction-to-Ambient Thermal Resistance in Still Air

Single-Layer PC Board

20-Pin TSSOP .........................................................+130°C/W

Multilayer PC Board

20-Pin TSSOP ...........................................................+91°C/W

Junction-to-Ambient Thermal Resistance with 500LFPM

Airflow Single-Layer PC Board

20-Pin TSSOP ..........................................................+9.6°C/W

Junction-to-Case Thermal Resistance

20-Pin TSSOP ............................................................+20°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 (Inputs and Outputs).......................≥2kV

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

PARAMETER

CONDITIONS

UNITS

SINGLE-ENDED INPUTS (SEL, EN)

Input High Voltage

VCC -

Input Low Voltage V

VCC -

Input Current I

IH(MAX)

, V

IL(MIN)

µA

DIFFERENTIAL INPUTS (CLK_, CLK_)

Single-Ended Input High Voltage (Note 4)

VBB connected to CLK_, Figure 1

VCC -

Single-Ended Input Low Voltage (Note 4)

VBB connected to CLK_, Figure 1

VCC -

High Voltage of Differential Input

IHD

VEE +

Low Voltage of Differential Input

ILD

VCC -

SYMBOL

MIN TYP MAX MIN TYP MAX MIN TYP MAX

1.225

-500 500 -500 500 -500 500

1.225

1.2

-40°C +25°C +85°C

1.625

0.1

1.225

1.2

1.625

0.1

1.225

1.2

1.625

0.1

MAX9315

1:5 Differential LVPECL/LVECL/HSTL

Clock and Data Driver

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC- VEE= 2.375V to 3.8V, outputs loaded with 50Ω ±1% to VCC- 2V, SEL = high or low, EN = low, unless otherwise noted. Typical values are at V

- VEE= +3.3V, V

IHD

= VCC- 1V, V

ILD

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

PARAMETER

CONDITIONS

UNITS

For (VCC - VEE) < +3.0V

VCC -

Differential Input Voltage

IHD

ILD

For (VCC - VEE) ≥ +3.0V

Input Current I

µA

OUTPUTS (Q_, Q_)

Single-Ended Output High Voltage

Figure 1

VCC -

Single-Ended Output Low Voltage

Figure 1

VCC -

Differential Output Voltage

VOH -

Figure 1

REFERENCE

Reference Voltage Output (Note 5)

IBB = ±0.5mA

VCC -

SUPPLY

Supply Current (Note 6)

SYMBOL

VIH, VIL, V

-40°C +25°C +85°C

MIN TYP MAX MIN TYP MAX MIN TYP MAX

0.1

0.1 3.0 0.1 3.0 0.1 3.0

IHD

, V

-150 150 -150 150 -150 150

ILD

1.145

1.945

550 910 550 910 550 910

1.525

0.865

1.695

1.325

0.1

1.145

1.945

1.525

0.865

1.695

1.325

0.1

1.145

1.945

1.525

0.865

1.695

1.325

41 48 45 55 49 65

MAX9315

1:5 Differential LVPECL/LVECL/HSTL Clock and Data Driver

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS

(VCC- VEE= 2.375V to 3.8V, outputs loaded with 50Ω ±1% to VCC- 2V, input frequency = 1.5GHz, input transition time = 125ps (20% to 80%), SEL = high or low, EN = low, V

IHD

= VEE+ 1.2V to VCC, V

ILD

= VEEto VCC- 0.15V, V

IHD

- V

ILD

= 0.15V to the smaller of 3V or

- VEE, unless otherwise noted. Typical values are at VCC- VEE= +3.3V, V

IHD

= VCC- 1V, V

ILD

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

UNITS

PARAMETER

CONDITIONS

Differential Inputto-Output Delay

PLHD

Figure 2

Output-to-Output Skew (Note 8)

Part-to-Part Skew (Note 9)

Added Random Jitter (Note 10)

p s ( RM S )

Added Deterministic Jitter (Note 10)

1.5Gbps 2E23-1 PRBS pattern

ps (p-p)

Switching Frequency

MAX

(VOH - VOL) ≥ 400mV, Figure 2

GHz

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

Figure 2

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 production tested at T

= +25°C and guaranteed by design over the full operating temperature range.

Note 4: Single-ended input operation using V

is limited to VCC- VEE= 3.0V to 3.8V.

Note 5: Use V

only for inputs that are on the same device as the VBBreference.

Note 6: All pins open except V

and VEE.

Note 7: Guaranteed by design and characterization. Limits are set at ±6 sigma. Note 8: Measured between outputs of the same part at the signal crossing points for a same-edge transition. Note 9: Measured between outputs of different parts at the signal crossing points under identical conditions for a same-edge transition. Note 10: Device jitter added to the input signal.

SYMBOL

-40°C +25°C +85°C

MIN TYP MAX MIN TYP MAX MIN TYP MAX

PHLD

SKOO

SKPP

fIN = 1.5GHz clock 0.8 1.2 0.8 1.2 0.8 1.2

tR, t

290 400 310 440 300 520

30 20 40 20 50

110 130 220

50 70 50 70 50 70

1.5 1.5 1.5

80 120 90 130 90 145

+ 7 hidden pages