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1 of 17GS9074A HD-LINX® II Adaptive Cable Equalizer

Data Sheet

34166 - 5 December 2011

GS9074A HD-LINX® II Adaptive Cable Equalizer

www.gennum.com

Features

• SMPTE 259M compliant

• Automatic cable equalization

• Multi-standard operation from 143Mb/s to 360Mb/s

• Supports DVB-ASI at 270Mb/s

• Small footprint (4mm x 4mm)

• Pb-free and RoHS compliant

• Manual bypass (useful for low data rates with slow

rise/fall times)

• Performance optimized for 270Mb/s

• Typical maximum equalized length of Belden 1694A

cable: 350m at 270Mb/s

•50Ω differential output (with internal 50Ω pull-ups)

• Manual output mute or programmable mute based on

max cable length adjust

• Single 3.3V power supply operation

• Operating temperature range: 0°C to +70°C

Applications

• SMPTE 259M Coaxial Cable Serial Digital Interfaces

Description

The GS9074A is a second-generation high speed BiCMOS

integrated circuit designed to equalize and restore signals

received over 75

co-axial cable

The GS9074A is designed to support SMPTE 259M, and is

optimized for performance at 270Mb/s.

The GS9074A features DC restoration to compensate for

the DC content of SMPTE pathological test patterns.

A voltage programmable mute threshold (MCLADJ) is

included to allow muting of the GS9074A output when an

approximate selected cable length is reached for SMPTE

259M signals. This feature allows the GS9074A to

distinguish between low amplitude SD-SDI signals and

noise at the input of the device. The serial digital outputs of

the GS9074A may be forced to a mute state by applying a

voltage to the MUTE pin.

Power consumption is typically 215mW using a 3.3V

power supply. The GS9074A is lead-free, and the

encapsulation compound does not contain halogenated

flame retardant (RoHS compliant).

Figure A: GS9074A Functional Block Diagram

CABLE LENGTH ADJUSTOR

CARRIER DETECT

MUTE

EQUALIZER DC RESTORE OUTPUT

AGC

MUTE

SDO

BYPASS

SDOSDI

SDI

MCLADJ

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Data Sheet

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Revision History

Contents

Features.................................................................................................................................................................1

Applications.........................................................................................................................................................1

Description...........................................................................................................................................................1

Revision History .................................................................................................................................................2

1. Pin Out...............................................................................................................................................................3

1.1 GS9074A Pin Assignment ..............................................................................................................3

1.2 GS9074A Pin Descriptions .............................................................................................................3

2. Electrical Characteristics ............................................................................................................................5

2.1 Absolute Maximum Ratings ..........................................................................................................5

2.2 DC Electrical Characteristics ........................................................................................................5

2.3 AC Electrical Characteristics ........................................................................................................6

3. Solder Reflow Profiles..................................................................................................................................8

4. Test Circuit.......................................................................................................................................................9

5. Input / Output Circuits ............................................................................................................................. 10

6. Detailed Description.................................................................................................................................. 12

6.1 Serial Digital Inputs ...................................................................................................................... 12

6.2 Cable Equalization ........................................................................................................................ 12

6.3 Programmable Mute Output ...................................................................................................... 13

6.4 Mute and Carrier Detect .............................................................................................................. 13

7. Application Information .......................................................................................................................... 14

7.1 Typical Application Circuit ........................................................................................................ 14

8. Package and Ordering Information...................................................................................................... 15

8.1 Package Dimensions ..................................................................................................................... 15

8.2 Recommended PCB Footprint ................................................................................................... 16

8.3 Packaging Data ............................................................................................................................... 16

8.4 Ordering Information ................................................................................................................... 17

Version ECR PCN Date Changes and/or Modifications

5 157362 – December 2011 Added 250pc tape & reel part number to Table 8-2: Ordering Information.

4 153754 – November 2009 Updated to latest Gennum template.

3 139635 38695 March 2006 Corrected pad standoff height and tolerances for pad width and package

dimension. Corrected pad shape.

2 138357 37278 November 2005 Converted to Data Sheet.

1 137888 – September 2005 Corrected process to BiCMOS.

0 136165 – March 2005 Converted to Preliminary Data Sheet. Updated typical application circuit.

Updated Input/Output circuits. Updated AC and DC electrical characteristics.

Updated description of MUTE and CD functionality. Corrected minor typing

errors. Updated center pad dimensions on PCB footprint.

A 135927 – February 2005 New document.

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Data Sheet

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1. Pin Out

1.1 GS9074A Pin Assignment

Figure 1-1: 16-Pin QFN

1.2 GS9074A Pin Descriptions

GS9074A

(top view)

VEE_A

SDI

SDI 2

SDO

VEE_D

AGC

BYPASS

MCLADJ

MUTE

Center Pad

(bottom of package, internally

bonded to VEE_A)

Table 1-1: Pin Descriptions

Pin Number Name Timing Ty pe Description

1, 4 VEE_A Analog Power Most negative power supply for analog circuitry.

Connect to GND.

2, 3 SDI, SDI Analog Input Serial digital differential input.

5, 6 AGC, AGC Analog – External AGC capacitors.

(See Section 7.1 Typical Application Circuit.)

7BYPASSNot

Synchronous

Input Forces the Equalizing and DC RESTORE stages into bypass mode

when HIGH. No equalization occurs in this mode.

8 MCLADJ Analog Input Maximum cable length adjust.

Adjusts the approximate maximum amount of cable to be

equalized (from 0m to the maximum cable length). The output is

muted (latched to the last state) when the maximum cable length is

achieved.

NOTE: MCLADJ is only recommended for data rates up to 270Mb/s.

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Data Sheet

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9 VEE_D Analog Power Most negative power supply for the digital circuitry and output

buffer.

Connect to GND.

10, 11 SDO, SDO Analog Output Equalized serial digital differential output.

12 VEE_D Analog Power Most negative power supply for the digital circuitry and output

buffer.

Connect to GND.

13 VCC_D Analog Power Most positive power supply for the digital I/O pins of the device.

Connect to +3.3V DC.

14 MUTE Not

Synchronous

Input CONTROL SIGNAL INPUT

levels are LVCMOS/LVTTL compatible. (3.3V Tolerant)

(Internal pull down resistor)

When the MUTE pin is set HIGH by the application interface, the

serial digital output of the device will be forced to a steady state.

When the MUTE pin is set LOW, the serial digital output of the

device will be active.

NOTE: This pin may be connected directly to the CD pin to allow

mute on loss of carrier.

15 CD Not

Synchronous

Output STATUS SIGNAL OUTPUT

Signal levels are LVCMOS/LVTTL compatible.

Indicates the presence of a good input signal.

When the CD pin is LOW, a good input signal has been detected.

When this pin is HIGH, the input signal is invalid.

This pin will indicate loss of carrier for data rates > 19Mb/s.

16 VCC_A Analog Power Most positive power supply for the analog circuitry of the device.

Connect to +3.3V DC.

– Center Pad – Power Internally bonded to VEE_A.

Table 1-1: Pin Descriptions (Continued)

Pin Number Name Timing Ty pe Description

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Data Sheet

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2. Electrical Characteristics

2.1 Absolute Maximum Ratings

Table 2-1 lists the absolute maximum ratings for the GS9074A. Conditions exceeding the

limits listed may cause permanent damage to the device. This is a stress rating only and

functional operation of the device at these or any other conditions above those listed in

the operational sections of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

2.2 DC Electrical Characteristics

Table 2-2 shows the DC electrical characteristics of the GS9074A where conditions are

VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown.

Table 2-1: Absolute Maximum Ratings

Parameter Value

Supply Voltage -0.5V to +3.6 VDC

Input ESD Voltage 2kV

Storage Temperature Range -50°C < Ts < 125°C

Input Voltage Range (any input) -0.3 to (VCC +0.3)V

Operating Temperature Range 0°C to 70°C

Reflow Temperature 260°C

Supply Voltage -0.5V to +3.6 VDC

Table 2-2: DC Electrical Characteristics

Parameter Symbol Conditions Min Typ Max Units Notes

Supply Voltage VCC – 3.135 3.3 3.465 V ±5%

Power Consumption PDTA = 25°C – 215 – mW –

Supply Current IsTA = 25°C – 65 – mA –

Output Common Mode

Voltage

VCMOUT TA = 25°C – VCC -

ΔVSDO/2

–V–

Input Common Mode

Voltage

VCMIN TA = 25°C – 1.75 – V –

MCLADJ DC Voltage (to

mute signal)

–0m, T

A = 25°C – 1.3 – V –

MCLADJ Range – TA = 25°C – 0.4 – V –

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Data Sheet

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2.3 AC Electrical Characteristics

Table 2-3 shows the AC electrical characteristics of the GS9074A where conditions are

VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown.

CD Output Voltage VCD(OH) Carrier not

present

2.4 – – V –

VCD(OL) Carrier present – – 0.4 V –

Mute Input Voltage

Required to Force

Outputs to Mute

VMute Min to Mute 2.0 – – V –

Mute Input Voltage

Required to Force

Outputs Active

VMute Max to Activate – – 0.8 V –

Table 2-2: DC Electrical Characteristics (Continued)

Parameter Symbol Conditions Min Typ Max Units Notes

Table 2-3: AC Electrical Characteristics

Parameter Symbol Conditions Min Typ Max Units Notes

Serial input data rate DRSDO –143–360Mb/s–

Input Voltage Swing ΔVSDI TA =25°C,

differential

720 800 950 mVp-p 1

Output Voltage Swing ΔVSDO 100Ω load, TA

=25°C,

differential

–750–mV

p-p –

Maximum Equalized Cable

Length

– 270Mb/s,

Belden 1694A,

350m

–0.2–UI2

– 270Mb/s,

Belden 8281,

280m

–0.2–UI2

– 360Mb/s,

Belden 1694A,

190m

–0.25–UI2

– 360Mb/s,

Belden 8281,

140m

–0.25–UI2

Output Rise/Fall time – 20% - 80% – 80 220 ps –

Mismatch in rise/fall time – – – – 30 ps –

Duty cycle distortion – – – – 100 ps –

Overshoot – – – – 10 % –

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Data Sheet

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Input Return Loss – – 15 – – dB –

Input Resistance – single ended – 1.64 – kΩ–

Input Capacitance – single ended – 1 – pF –

Output Resistance – single ended – 50 – Ω–

NOTES:

1. 0m cable length.

2. Equalizer Pathological.

Table 2-3: AC Electrical Characteristics (Continued)

Parameter Symbol Conditions Min Typ Max Units Notes

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Data Sheet

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3. Solder Reflow Profiles

The device is manufactured with Matte-Sn terminations and is compatible with both

standard eutectic and Pb-free solder reflow profiles. MSL qualification was performed

using the maximum Pb-free reflow profile shown in Figure 3-1. The recommended

standard eutectic reflow profile is shown in Figure 3-2.

Figure 3-1: Maximum Pb-free Solder Reflow Profile (Preferred)

Figure 3-2: Standard Eutectic Solder Reflow Profile (Pb-free package)

25°C

150°C

200°C

217°C

260°C

250°C

Time

Temperature

8 min. max

60-180 sec. max

60-150 sec.

20-40 sec.

3°C/sec max

6°C/sec max

25°C

100°C

150°C

183°C

230°C

220°C

Time

Temperature

6 min. max

120 sec. max

60-150 sec.

10-20 sec.

3°C/sec max

6°C/sec max

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Data Sheet

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4. Test Circuit

Figure 4-1: Test Circuit

GigaBERT

1400

EXT.

CLOCK

OUT

DATA

OUT

EXT.

CLOCK

1.485GHz/270MHz

GS1574A/9074A

TEST BOARD TDS 820

CH. 1

CH. 2

OUTIN

OUT

EXT. TRIGGER

50/75

8281 or 1694A CABLE

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Data Sheet

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5. Input / Output Circuits

Figure 5-1: Input Equivalent Circuit

Figure 5-2: MCLADJ Equivalent Circuit

Figure 5-3: Output Circuit

3.6k

SDI SDI

VCC

MCLADJ

12.2k

150µ

SDOSDO

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Data Sheet

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Figure 5-4: MUTE and BYPASS Circuits

Figure 5-5: CD Circuit

MUTE,

BYPASS

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Data Sheet

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6. Detailed Description

The GS9074A is a high speed BiCMOS IC designed to equalize serial digital signals.

The GS9074A can equalize SD serial digital signals, and will typically equalize greater

than 350m at 270Mb/s.

The GS9074A is powered from a single +3.3V power supply and consumes

approximately 215mW of power.

6.1 Serial Digital Inputs

The serial data signal may be connected to the input pins (SDI/SDI) in either a

differential or single ended configuration. AC coupling of the inputs is recommended, as

the SDI and SDI inputs are internally biased at approximately 1.8V.

6.2 Cable Equalization

The input signal passes through a variable gain equalizing stage whose frequency

response closely matches the inverse of the cable loss characteristic. In addition, the

variation of the frequency response with control voltage imitates the variation of the

inverse cable loss characteristic with cable length.

The edge energy of the equalized signal is monitored by a detector circuit which

produces an error signal corresponding to the difference between the desired edge

energy and the actual edge energy. This error signal is integrated by both an internal and

an external AGC filter capacitor providing a steady control voltage for the gain stage. As

the frequency response of the gain stage is automatically varied by the application of

negative feedback, the edge energy of the equalized signal is kept at a constant level

which is representative of the original edge energy at the transmitter. The equalized

signal is also DC restored, effectively restoring the logic threshold of the equalized signal

to its correct level independent of shifts due to AC coupling. The digital output signals

have a nominal voltage of 750mVpp differential, or 375mVpp single ended when

terminated with 50Ω as shown in Figure 6-1.

Figure 6-1: Typical Output Voltage Levels

50 50

SDO

+187.5mV

-187.5mV

= 2.925V

typical

+187.5mV

-187.5mV

= 2.925V

typical

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Data Sheet

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6.3 Programmable Mute Output

The GS9074A incorporates a programmable threshold output mute (MCLADJ).

In applications where there are multiple input channels using the GS9074A, it is

advantageous to have a programmable mute output to avoid signal crosstalk.

The output of the GS9074A can be muted when the input signal decreases below a

certain input level. This threshold is determined using the input voltage applied to the

MCLADJ pin. The MCLADJ pin may be left unconnected for applications where output

muting is not required.

This feature has been designed for use in applications such as routers where signal

crosstalk and circuit noise cause the equalizer to output erroneous data when no input

signal is present. The use of a Carrier Detect function with a fixed internal reference

does not solve this problem since the signal to noise ratio on the circuit board could be

significantly less than the default signal detection level set by the on chip reference.

NOTE: MCLADJ is only recommended for data rates up to 360Mb/s.

6.4 Mute and Carrier Detect

The GS9074A includes a MUTE input pin that allows the application interface to mute

the serial digital output at any time. Set the MUTE pin HIGH to mute SDO and SDO. In

this case, the outputs will mute regardless of the setting of the BYPASS pin.

A Carrier Detect output pin (CD) indicates the presence of a valid signal at the input of

the GS9074A. When CD is LOW, the device has detected a valid input on SDI and SDI.

When CD is HIGH, the device has not detected a valid input.

NOTE: CD will only detect loss of carrier for data rates greater than 19Mb/s.

The CD output pin may be connected directly to the MUTE input pin to enable automatic

muting of the GS9074A when no valid input signal has been detected.

NOTE: If the maximum cable length is exceeded and the device is not in bypass mode

the GS1574A will not assert the CD pin even if a carrier is present.

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Data Sheet

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7. Application Information

7.1 Typical Application Circuit

Figure 7-1: GS9074A Typical Application Circuit

GS9074A

SDI

VEE_D

MUTE

VCC_D

AGC

BYPASS

MCLADJ

VEE_A

NOTE: All resistors in Ohms, capacitors in Farads,

and inductors in Henrys, unless otherwise noted.

VEE_A

AGC

VCC_A

SDO

VEE_D

10n

SDO

4u7

SDO

MUTE

VCC

BYPASS

MCLADJ

470n

6.2n

SDI

37R4

VCC

470n

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Data Sheet

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8. Package and Ordering Information

8.1 Package Dimensions

Figure 8-1: GS9074A Package Dimensions

4.00+/-0.05

0.15

0.10 C

16X

0.08 C

SEATING PLANE

0.85+/-0.05

0.00-0.05

0.65/2

0.65

DETAIL B

SCALE:NTS

DATUM A OR B

TERMINAL TIP

0.20 REF

DATUM B

DETAIL B

0.65

16X

0.35+/-0.05

0.10

0.05 C

DATUM A

2.76+/-0.10

0.40+/-0.05

2.76+/-0.10

DETAIL B

CENTER TAB

PIN 1 AREA

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Data Sheet

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8.2 Recommended PCB Footprint

The Center Pad should be connected to the most negative power supply plane for analog

circuitry in the device (VEE_A) by a minimum of 5 vias.

Note: Suggested dimensions only. Final dimensions should conform to customer design

rules and process optimizations.

8.3 Packaging Data

0.35

0.55

2.76

3.70

2.763.70

NOTE: All dimensions

are in millimeters.

0.65

CENTER PAD

Table 8-1: Packaging Data

Parameter Value

Package Type 4mm x 4mm 16-pin QFN

Package Drawing Reference JEDEC M0220

Moisture Sensitivity Level 3

Junction to Case Thermal Resistance, θj-c 31.0°C/W

Junction to Air Thermal Resistance, θj-a (at zero airflow) 43.8°C/W

Psi 11.0°C/W

Pb-free and RoHS compliant Yes

CANADA

Suite 320, 3553 31st St. N.W.

Calgary, Alberta T2L 2K7

Canada

Phone: +1 (403) 284-2672

Fax: +1 (905) 632-2055

415 Legget Drive, Suite 200

Kanata, Ontario K2K 2B2

Canada

Phone: +1 (613) 270-0458

Fax: +1 (613) 270-0429

GERMANY

Gennum Canada Limited

Niederlassung Deutschland

München, Germany

Phone: +49 89 309040 290

Fax: +49 89 309040 293

E-mail: gennum-germany@gennum.com

INDIA

#208(A), Nirmala Plaza,

Airport Road, Forest Park Square

Bhubaneswar 751009

India

Phone: +91 (674) 65304815

Fax: +91 (674) 259-5733

JAPAN KK

Shinjuku Green Tower Building 27F

6-14-1, Nishi Shinjuku

Shinjuku-ku, Tokyo, 160-0023

Japan

Phone: +81 (03) 3349-5501

Fax: +81 (03) 3349-5505

E-mail: gennum-japan@gennum.com

Web Site: http://www.gennum.co.jp

MEXICO

Venustiano Carranza 122 Int. 1

Centro, Aguascalientes

Mexico CP 20000

Phone: +1 (416) 848-0328

NORTH AMERICA WESTERN REGION

691 South Milpitas Blvd., Suite #200

Milpitas, CA 95035

United States

Phone: +1 (408) 934-1301

Fax: +1 (408) 934-1029

E-mail: naw_sales@gennum.com

NORTH AMERICA EASTERN REGION

4281 Harvester Road

Burlington, Ontario L7L 5M4

Canada

Phone: +1 (905) 632-2996

Fax: +1 (905) 632-2055

E-mail: nae_sales@gennum.com

TAIWAN

6F-4, No.51, Sec.2, Keelung Rd.

Sinyi District, Taipei City 11502

Taiwan R.O.C.

Phone: (886) 2-8732-8879

Fax: (886) 2-8732-8870

E-mail: gennum-taiwan@gennum.com

UNITED KINGDOM

South Building, Walden Court

Parsonage Lane,

Bishop’s Stortford Hertfordshire, CM23 5DB

United Kingdom

Phone: +44 1279 714170

Fax: +44 1279 714171

2, West Point Court, Great Park Road

Bradley Stoke, Bristol BS32 4PY

Great Britain

Phone: +44 1454 462200

Fax: +44 1454 462201

SNOWBUSH IP - A DIVISION OF GENNUM

439 University Ave. Suite 1700

Toronto, Ontario M5G 1Y8

Canada

Phone: +1 (416) 925-5643

Fax: +1 (416) 925-0581

E-mail: sales@snowbush.com

Web Site: http://www.snowbush.com

DOCUMENT IDENTIFICATION

DATA SHEET

The product is in production. Gennum reserves the right to make changes to

the product at any time without notice to improve reliability, function or

design, in order to provide the best product possible.

GS9074A HD-LINX® II Adaptive Cable Equalizer

Data Sheet

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Gennum Corporation assumes no liability for any errors or omissions in this document, or for the use of the circuits or devices described herein. The sale of

the circuit or device described herein does not imply any patent license, and Gennum makes no representation that the circuit or device is free from patent

infringement.

All other trademarks mentioned are the properties of their respective owners.

GENNUM and the Gennum logo are registered trademarks of Gennum Corporation.

www.gennum.com

GENNUM CORPORATE HEADQUARTERS

4281 Harvester Road, Burlington, Ontario L7L 5M4 Canada

Phone: +1 (905) 632-2996 Fax: +1 (905) 632-2055

E-mail: corporate@gennum.com www.gennum.com

CAUTION

ELECTROSTATIC SENSITIVE DEVICES

DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A

STATIC-FREE WORKSTATION

8.4 Ordering Information

Table 8-2: Ordering Information

Part Number Package Temperature Range

GS9074A GS9074ACNE3 16-pin QFN (490pc tray) 0°C to 70°C

GS9074A GS9074ACTE3 16-pin QFN (250pcs tape & reel) 0°C to 70°C