GS9077 HD-LINX® III SD-SDI Cable Driver GS9077 Data Sheet Features Description • SMPTE 344M and SMPTE 259M compliant • Dual coaxial cable driving outputs The GS9077 is a high-speed BiCMOS integrated circuit designed to drive one or two 75Ω co-axial cables. • Selectable power down mode • 50Ω differential PECL input • Pb-free and RoHS compliant • Seamless interface to other HD-LINX® III family products • Single 3.3V power supply operation • Operating temperature range: 0°C to 70°C The GS9077 may drive data rates up to 540Mb/s and provides a disable pin that may be used to power down the output stage. Applications • SMPTE 344M and SMPTE 259M Coaxial Cable Serial Digital Interfaces. The GS9077 accepts a LVPECL level differential input that may be AC coupled. External biasing resistors at the inputs are not required. Power consumption is typically 168mW using a 3.3V power supply. The GS9077 is Pb-free, and the encapsulation compound does not contain halogenated flame retardant. This component and all homogeneous subcomponents are RoHS compliant. BANDGAP REFERENCE AND BIASING CIRCUIT DDI INPUT DIFFERENTIAL PAIR RSET SDO OUTPUT STAGE & CONTROL DDI SDO DISABLE Functional Block Diagram 44619 - 0 May 2007 1 of 14 www.gennum.com GS9077 Data Sheet Contents Features ........................................................................................................................1 Applications...................................................................................................................1 Description ....................................................................................................................1 1. Pin Out ......................................................................................................................3 1.1 Pin Assignment ...............................................................................................3 1.2 Pin Descriptions ..............................................................................................3 2. Electrical Characteristics ...........................................................................................4 2.1 Absolute Maximum Ratings ............................................................................4 2.2 DC Electrical Characteristics ..........................................................................4 2.3 AC Electrical Characteristics ...........................................................................5 2.4 Solder Reflow Profiles .....................................................................................6 3. Input / Output Circuits ...............................................................................................7 4. Detailed Description ..................................................................................................8 4.1 Input Interfacing ..............................................................................................8 4.2 Output Interfacing ...........................................................................................8 4.2.1 Output Amplitude (RSET) ......................................................................9 4.2.2 Output Disable .......................................................................................9 4.3 Output Return Loss Measurement ..................................................................9 5. Application Information............................................................................................10 5.1 PCB Layout ...................................................................................................10 5.2 Typical Application Circuit .............................................................................10 6. Package & Ordering Information .............................................................................11 6.1 Package Dimensions ....................................................................................11 6.2 Recommended PCB Footprint ......................................................................12 6.3 Packaging Data .............................................................................................12 6.4 Marking Diagram ...........................................................................................13 6.5 Ordering Information .....................................................................................13 7. Revision History ......................................................................................................14 44619 - 0 May 2007 2 of 14 GS9077 Data Sheet 1. Pin Out DDI 1 DDI 2 NC NC NC NC 1.1 Pin Assignment 16 15 14 13 12 SDO 11 SDO GS9077 (top view) VEE 3 10 NC RSET 4 9 VCC RSVD DISABLE NC 8 NC 7 6 5 Center Pad (bottom of package) Figure 1-1: 16-Pin QFN 1.2 Pin Descriptions Table 1-1: Pin Descriptions Pin Number Name Timing Type Description DDI, DDI Analog Input Serial digital differential input. 3 VEE – Power Most negative power supply connection. Connect to GND. 4 RSET Analog Input External output amplitude control resistor. NC – – No Connect. Not bonded internally. 6 DISABLE Non Synchronous Input Serial output disable. When asserted LOW, the SDO/SDO output driver is powered off. SDO/SDO will float to VCC through the pull-up resistor. 7 RSVD – Reserved Do not connect. 9 VCC – Power Most positive power supply connection. Connect to +3.3V. 11,12 SDO, SDO Analog Output Serial digital differential output. – Center Pad – Power Connect to most negative power supply plane following the recommendations in Recommended PCB Footprint on page 12. 1,2 5,8,10,13,14, 15,16 44619 - 0 May 2007 3 of 14 GS9077 Data Sheet 2. Electrical Characteristics 2.1 Absolute Maximum Ratings Parameter Value Supply Voltage -0.5V to 3.6 VDC Input ESD Voltage 4kV 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 Solder Reflow Temperature 260°C NOTE: Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions or at any other condition beyond those indicated in the AC/DC Electrical Characteristic sections is not implied. 2.2 DC Electrical Characteristics Table 2-1: DC Electrical Characteristics VCC = 3.3V ±5%; TA = 0°C to 70°C, unless otherwise shown Parameter Symbol Conditions Min Typ Max Units Supply Voltage VCC – 3.135 3.3 3.465 V Power Consumption PD TA = 25°C, SDO/SDO enabled – 168 – mW TA = 25°C, SDO/SDO disabled – 96 – mW TA = 25°C, SDO/SDO enabled – 51 – mA TA = 25°C, SDO/SDO disabled – 29 – mA Supply Current Is Output Voltage VCMOUT Common mode – VCC - VOUT – V Input Voltage VCMIN Common mode 1.4 + ∆VDDI/2 – VCC - ∆VDDI/2 V DISABLE Input VIH IIH <= 10 uA 2.0 – – V VIL IIL <= 10 uA – – 0.8 V 44619 - 0 May 2007 4 of 14 GS9077 Data Sheet 2.3 AC Electrical Characteristics Table 2-2: AC Electrical Characteristics VCC = 3.3V ±5%; TA = 0°C to 70°C, unless otherwise shown Parameter Symbol Conditions Min Typ Max Units Notes Serial input data rate DRSDO – – – 540 Mb/s 1 Additive jitter – 270Mb/s – 16 – psp-p – Rise/Fall time tr, tf – 400 – 800 ps 2 Mismatch in rise/fall time Utr, Utf – – – 35 ps – Duty cycle distortion – – – – 100 ps 3 Overshoot – – – – 8 % 3 Output Return Loss ORL – 15 23 – dB 4 Output Voltage Swing VOUT RSET = 750Ω 750 800 850 mVp-p 3 Input Voltage Swing UVDDI Differential 300 – 2200 mVp-p – NOTES: 1. 2. 3. 4. The input coupling capacitor must be set accordingly for lower data rates. Rise/Fall time measured between 20% and 80%. Single Ended into 75Ω external load. ORL depends on board design. The GS9077 achieves this specification on Gennum's evaluation boards. 44619 - 0 May 2007 5 of 14 GS9077 Data Sheet 2.4 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 2-1.The recommended standard Pb reflow profile is shown in Figure 2-2. Temperature 60-150 sec. 20-40 sec. 260˚C 250˚C 3˚C/sec max 217˚C 6˚C/sec max 200˚C 150˚C 25˚C Time 60-180 sec. max 8 min. max Figure 2-1: Maximum Pb-free Solder Reflow Profile (Preferred) 60-150 sec. Temperature 10-20 sec. 230˚C 220˚C 3˚C/sec max 183˚C 6˚C/sec max 150˚C 100˚C 25˚C Time 120 sec. max 6 min. max Figure 2-2: Standard Pb Reflow Profile 44619 - 0 May 2007 6 of 14 GS9077 Data Sheet 3. Input / Output Circuits VCC DDI DDI VCC 10k 5k 10k 10k Figure 3-1: Differential Input Stage (DDI/DDI) Vcc SDO SDO IREF Figure 3-2: Differential Output Stage (SDO/SDO) 44619 - 0 May 2007 7 of 14 GS9077 Data Sheet 4. Detailed Description 4.1 Input Interfacing DDI/DDI are high impedance differential inputs. The equivalent input circuit is shown in Figure 3-1. Several conditions must be observed when interfacing to these inputs: • The differential input signal amplitude must be between 300 and 2200mVpp. • The common mode voltage range must be as specified in the DC Electrical Characteristics on page 4. • For input trace lengths longer than approximately 1cm, the inputs should be terminated as shown in the Typical Application Circuit. The GS9077 inputs are self-biased, allowing for simple AC coupling to the device. For serial digital video, a minimum capacitor value of 4.7µF should be used to allow coupling of pathological test signals. A tantalum capacitor is recommended. 4.2 Output Interfacing The GS9077 outputs are current mode, and will drive typically 800mV into a 75Ω load. These outputs are protected from accidental static damage with internal ESD protection diodes. In order for a DDI output circuit using the GS9077 to meet this specification, the output application circuit shown in Typical Application Circuit on page 10 is recommended. The value of LCOMP will vary depending on the PCB layout, with a typical value of 5.6nH. A 4.7µF capacitor is used for AC coupling the output of the device. This value is chosen to ensure that pathological signals can be coupled without a significant DC component occurring. Please see Application Information on page 10 for more details. 44619 - 0 May 2007 8 of 14 GS9077 Data Sheet 4.2.1 Output Amplitude (RSET) The output amplitude of the GS9077 can be adjusted by changing the value of the RSET resistor as shown in Table 4-1. For an 800mVp-p output with a nominal ±7% tolerance, a value of 750Ω is required. A ±1% SMT resistor should be used. The RSET resistor is part of the high speed output circuit of the GS9077. The resistor should be placed as close as possible to the RSET pin. In addition, the PCB capacitance should be minimized at this node by removing the PCB groundplane beneath the RSET resistor and the RSET pin. Table 4-1: RSET vs VOD RSET R (Ω) Output Swing (mVp-p) 995 608 824 734 750 800 680 884 573 1040 NOTE: For reliable operation of the GS9077 over the full temperature range, do not use an RSET value below 573Ω. 4.2.2 Output Disable The serial output disable (DISABLE), disables power to the current mode serial digital output driver. When asserted LOW, the SDO/SDO output driver is powered off. SDO/SDO will float to VCC through the pull-up resistor. 4.3 Output Return Loss Measurement To perform a practical return loss measurement, it is necessary to force the GS9077 output to a DC high or low condition. The actual measured return loss will be based on the outputs being static at VCC or VCC-1.6V. Under normal operating conditions the outputs of the device swing between VCC-0.4V and VCC-1.2V. 44619 - 0 May 2007 9 of 14 GS9077 Data Sheet 5. Application Information 5.1 PCB Layout Special attention must be paid to component layout when designing serial digital interfaces for SDTV. An FR-4 dielectric can be used, however, controlled impedance transmission lines are required for PCB traces longer than approximately 1cm. Note the following PCB artwork features used to optimize performance: • The PCB trace width for SD rate signals is closely matched to SMT component width to minimize reflections due to changes in trace impedance. • The PCB ground plane is removed under the GS9077 output components to minimize parasitic capacitance. • The PCB ground plane is removed under the GS9077 RSET pin and resistor to minimize parasitic capacitance. • Input and output BNC connectors are surface mounted in-line to eliminate a transmission line stub caused by a BNC mounting via high speed traces which are curved to minimize impedance variations due to change of PCB trace width. 5.2 Typical Application Circuit * 5.6n 75 4.7u 49.9 DIFFERENTIAL DATA INPUT 10n 1 2 3 4 6 49.9 4.7u GS9077 DDI DDI VEE RSET DISABLE SDO SDO VCC 12 11 9 75 75 10n BNC 4.7u * TYPICAL VALUE: VARIES WITH LAYOUT VCC 750 VCC 75 * 5.6n VCC BNC 4.7u 10n DISABLE NOTE: All resistors in Ohms, capacitors in Farads, and inductors in Henrys, unless otherwise noted. Figure 5-1: Typical Application Circuit 44619 - 0 May 2007 10 of 14 GS9077 Data Sheet 6. Package & Ordering Information 6.1 Package Dimensions A 2.76+/-0.10 0.40+/-0.05 4.00+/-0.05 DATUM A PIN 1 AREA 2X 2.76+/-0.10 4.00+/-0.05 B CENTER TAB DETAIL B 0.15 C DATUM B 0.15 C 2X 0.35+/-0.05 0.65 0.20 REF 16X 0.10 C C 0.10 CAB 0.05 C DATUM A OR B 16X 0.08 C SEATING PLANE 0.65/2 0.00-0.05 0.85+/-0.05 TERMINAL TIP 0.65 DETAIL B SCALE:NTS 44619 - 0 May 2007 11 of 14 GS9077 Data Sheet 6.2 Recommended PCB Footprint 0.35 0.65 0.55 3.70 2.76 CENTER PAD NOTE: All dimensions are in millimeters. 2.76 3.70 The Center Pad should be connected to the most negative power supply plane (VEE) by a minimum of 5 vias. NOTE: Suggested dimensions only. Final dimensions should conform to customer design rules and process optimizations. 6.3 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, Ψ 11.0°C/W Pb-free and RoHS compliant Yes 44619 - 0 May 2007 12 of 14 GS9077 Data Sheet 6.4 Marking Diagram Pin 1 Indicator GS9077 XXXXE3 YYWW XXXX - Lot/Work Order ID YYWW - Date Code YY 2-digit year WW 2-digit week number 6.5 Ordering Information GS9077 44619 - 0 Part Number Package Temperature Range GS9077CNE3 16-pin QFN 0°C to 70°C May 2007 13 of 14 GS9077 Data Sheet 7. Revision History Version 0 ECR PCN Date Changes and/or Modifications 144889 – May 2007 New document. CAUTION ELECTROSTATIC SENSITIVE DEVICES DO NOT OPEN PACKAGES OR HANDLE EXCEPT AT A STATIC-FREE WORKSTATION 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. GENNUM CORPORATION Mailing Address: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Shipping Address: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5 Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 GENNUM JAPAN CORPORATION Shinjuku Green Tower Building 27F, 6-14-1, Nishi Shinjuku, Shinjuku-ku, Tokyo, 160-0023 Japan Tel. +81 (03) 3349-5501, Fax. +81 (03) 3349-5505 GENNUM UK LIMITED 25 Long Garden Walk, Farnham, Surrey, England GU9 7HX Tel. +44 (0)1252 747 000 Fax +44 (0)1252 726 523 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. GENNUM and the G logo are registered trademarks of Gennum Corporation. © Copyright 2007 Gennum Corporation. All rights reserved. Printed in Canada. www.gennum.com 44619 - 0 May 2007 14 of 14 14