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| GENLINXTM GS9008 Cable Driver with Two Adjustable Outputs DATA SHEET FEATURES * two outputs, adjustable from 0 to 1100 mVp-p into 75 loads * nominal 600 ps rise and fall times * accepts SMPTE and standard ECL input levels * operates from a single +5 or -5 volt supply * on-chip DC restoration for low jitter * 170 mW power dissipation * interfaces with GENLINX TM GS9002, GS9004A, GS9005A and GS9015A APPLICATIONS * SMPTE 259M Serial Digital Systems (4:2:2 & 4sc) * Other Serial Digital Video Interfaces - 360 Mb/s * General purpose high speed driver applications PIN CONNECTIONS While there are no plans to discontinue the GS9008, Gennum has developed a successor product with improved features and performance called the GS9028. The GS9028 is recommended for new designs. The differential inputs are AC-coupled and internally DCrestored which allows correct passage of pathological check codes associated with the serial digital standards. Even though the inputs are AC coupled, static protection diodes at each input restrict the DC differential so that if the driving source uses the opposite polarity power supply, external DC blocking capacitors must be used. Correctly terminated output signal levels are adjustable from as low as 0 mV to as high as 1100 mV with little change in other performance parameters. Performance is guaranteed for output levels between 600 mV and 1000 mV. The gain of the output stages is varied by adjusting the VSET voltage with respect to an internal band gap reference voltage VREF. The GS9008 is packaged in an 8 pin SOIC, and operates from a single +5 or -5 volt supply consuming typically only 170 mW of power. GS9008 VSET GAIN CONTROL VCC (GND) DEVICE DESCRIPTION The GENLINX TM GS9008 is a bipolar integrated circuit designed to drive two 75 co-axial cables at data rates exceeding 400 Mb/s. It directly interfaces with other GENLINXTM devices and can also be used as a general purpose high speed cable driver. OUTPUT 1 OUTPUT 1 VSET VREF 1 2 8 7 VCC INPUT INPUT VEE GS9008 3 4 6 5 ORDERING INFORMATION Part Number GS9008 - CKA Package Type 8 Pin SOIC Temperature Range INPUT 0 to 70C INPUT INPUT BUFFER & DC RESTORE OUTPUT DRIVER OUTPUT 1 OUTPUT 1 VREF BAND-GAP REFERENCE GND (VEE) Patent No. 5,426,389. FUNCTIONAL BLOCK DIAGRAM Revision Date: April 1998 Document No. 520 - 77 - 04 GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996 fax. +1 (905) 632-5946 Web Site: www.gennum.com E-mail: info@gennum.com ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage (VS) Input Voltage Range (any input) Power Dissipation Operating Temperature Range Storage Temperature Range Lead Temperature (soldering, 10 sec) VALUE 5.5 V VS -0.5 V 300 mW 0C T A 70C -65C T S 150C 260C GS9008 CABLE DRIVER - DC ELECTRICAL CHARACTERISTICS Conditions: V S = 5V, T A = 0C to 70C, R L= 150 to GND and 144 AC coupled unless otherwise shown PARAMETER Supply Voltage Power Consumption Supply Current SYMBOL VS PD I S1 CONDITIONS MIN 4.5 TYP 5.0 170 62 MAX 5.5 190 67 UNITS volts mW mA 2 x150 Loads DC 1% Accuracy, TA= 25 C VSET = (0.667) VREF o - Supply Current Reference Voltage I S2 VREF DC No Loads, TA= 25oC 10 k to ground - 16 1.2 20 - mA volts GS9008 CABLE DRIVER - AC ELECTRICAL CHARACTERISTICS Conditions: V = 5V, T = 0C to 70C, R = 150 to GND and 144 AC coupled unless otherwise shown S A L PARAMETER Input Signal Amplitude Input Signal Rise/Fall Times Output Amplitudes across 75 Load (See Note 1) SYMBOL VIN CONDITIONS MIN 700 - TYP 800 600 800 1000 25 -12 -45 630 575 530 0 1 MAX 1000 750 660 880 1100 100 80 80 800 800 800 25 - UNITS mVp-p ps NOTES tR,tF VSET = (0.5) VREF VOUT V SET = (0.667) V REF VSET = (0.833) V REF 540 720 900 400 400 400 - mVp-p Notes 1 & 2 mVp-p Notes 1 & 2 mVp-p Notes 1 & 2 ppm/oC ppm/oC ppm/oC ps ps ps % ps ns See Fig. 3 Output Amplitude Temperature Coefficient (See Note 2) VSET = (0.5) VREF TC VSET = (0.667) V REF VSET = (0.833) V REF VSET = (0.5) VREF Output Rise/Fall Times (20% to 80%) Output Overshoot Jitter Propagation Delay tR,t F VSET = (0.667) V REF VSET = (0.833) V REF tR = tF = 600 ps tJ tP at 270 Mb/s NOTE 1. V OUT is measured across a correctly terminated load, back matched to the device. The peak to peak voltage of the device itself is 2 x VOUT. 2. V OUT is proportional to VSET and VSET may be an external low impedance, high stability supply. In this case the amplitude temperature coefficient will not be guaranteed. 520 - 77 - 3 2 VCC INPUT / OUTPUT CIRCUITS VCC VCC 400 400 VCC VOUT SERIAL INPUTS VREF1 0.5p 400 VREF1 + VREF2 VCC VOUT Fig. 1 Input Circuit (Pins 6 and 7) +5V OUTPUT LEVEL ADJUST 10k 0.1 Fig. 2 Output Circuit (Pins 1 and 2) 1.8p 5 INPUT SIGNAL INPUT SIGNAL 6 7 8 + 10 0.1 150 4 3 1.0 68 OUTPUT -1 (75) GS9008 2 1.0 1 1.8p 150 68 OUTPUT -1 (75) All resistors in ohms, all capacitors in microfarads unless otherwise stated. Fig. 3 Typical Application Circuit -5V +5V 7 ECL DRIVER 0.1F 6 0.1F GS9008 -2V All resistors in ohms, all capacitors in microfarads unless otherwise stated. Fig. 4 Split Supply Interfacing 520 - 77 - 3 3 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 at any time 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 Tel. +1 (905) 632-2996 Fax +1 (905) 632-2814 SHIPPING ADDRESS: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5 REVISION NOTES: New information added to Device Description GENNUM JAPAN CORPORATION C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839 GENNUM UK LIMITED Centaur House, Ancells Business Park, Ancells Road, Fleet, Hampshire, UK GU13 8UJ Tel. +44 (1252) 761 039 Fax +44 (1252) 761 114 Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. (c) Copyright March 1993 Gennum Corporation. All rights reserved. Printed in Canada. 520 - 77 - 3 4 |
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