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1 of 14 gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 gs1528b hd-linx? ii multi-rate dual slew-rate cable driver www.gennum.com features ? smpte 292m, smpte 344m and smpte 259m compliant ? dual coaxial cable driving outputs with selectable slew rate ?50 differential pecl input ? pb-free and rohs compliant ? seamless interface to other hd-linx ii family products ? single 3.3v power supply operation ? operating temperature range: 0c to 70c applications ? smpte 292m, smpte 344m and smpte 259m coaxial cable serial digital interfaces description the gs1528b is a second generation high-speed bicmos integrated circuit designed to drive one or two 75 co-axial cables. the gs1528b may drive data rates up to 1.485gb/s and provides two selectable slew rates in order to achieve compliance to smpte 259m, smpte 344m and smpte 292m. the gs1528b 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 gs1528b is pb-free, and the encapsulation compound does not contain halogenated flame retardant. this component and all homogeneous subcomponents are rohs compliant. figure a: gs1528b functional block diagram sdo r set sdo ddi ddi sd/hd bandgap reference and biasing circuit output stage & control input differential pair
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 2 of 14 revision history contents features....................................................................................................................... ..........................................1 applications................................................................................................................... ......................................1 description.................................................................................................................... .......................................1 revision history ............................................................................................................... ..................................2 1. pin out..................................................................................................................... ..........................................3 1.1 gs1528b pin assignment .................................................................................................... ...........3 1.2 gs1528b 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 3. solder reflow profiles...................................................................................................... ............................6 4. input / output circuits ..................................................................................................... ...........................7 5. detailed description........................................................................................................ .............................8 5.1 input interfacing ......................................................................................................... ......................8 5.2 output interfacing ........................................................................................................ ...................8 5.3 output return loss measurement ........................................................................................... 1 0 5.4 output amplitude adjustment ............................................................................................... .. 10 6. application information ..................................................................................................... ..................... 11 6.1 pcb layout ................................................................................................................ ....................... 11 6.2 typical application circuit ............................................................................................... ......... 11 7. package and ordering information............................................................................................ .......... 12 7.1 package dimensions ........................................................................................................ ............. 12 7.2 packaging data ............................................................................................................ ................... 12 7.3 marking diagram ........................................................................................................... ................ 13 7.4 ordering information ...................................................................................................... ............. 13 version ecr pcn date changes and/or modifications 4 154633 C august 2010 correction to 7.1 package dimensions . added 250pc tape & reel part number to 7.4 ordering information . 3 153754 C november 2009 updated to latest gennum template. 2 142319 C april 2007 converting to data sheet. added section 7.3 marking diagram . added typical orl value in table 2-3: ac electrical characteristics . 1 141659 C august 2006 removed power consumption and supply current data for sdo/sdo disabled in table 2-2: dc electrical characteristics . 0 140615 C may 2006 new document.
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 3 of 14 1. pin out 1.1 gs1528b pin assignment figure 1-1: 8-pin soic 1.2 gs1528b pin descriptions ddi ddi v ee r set sdo sdo sd/hd v cc 1 2 3 4 8 7 6 5 gs1528b 8-pin soic top view table 1-1: pin descriptions pin number name timing ty p e description 1,2 ddi, ddi analog input serial digital differential input. 3v ee C power most negative power supply connection. connect to gnd. 4r set analog input external output amplitude control resistor. 5v cc C power most positive power supply connection. connect to +3.3v. 6 sd/hd non synchronous input output slew rate control. when set high, the output will meet smpte 259m rise/fall time specifications. when set low, the serial outputs will meet smpte 292m rise/fall time specifications.
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 4 of 14 2. electrical characteristics 2.1 absolute maximum ratings table 2-1 lists the absolute maximum ratings for the gs1528b. 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 gs1528b where conditions are v cc = 3.3v 5%, t a = 0c to 70c, unless otherwise shown. table 2-1: absolute maximum ratings parameter value supply voltage -0.5v to 3.6 v dc input esd voltage 4kv storage temperature range -50c < t s < 125c input voltage range (any input) -0.3 to (v cc +0.3)v operating temperature range 0c to 70c solder reflow temperature 260c power dissipation 300mw table 2-2: dc electrical characteristics parameter symbol conditions min ty p max units supply voltage v cc C 3.135 3.3 3.465 v power consumption p d t a = 25c C 168 C mw supply current i s t a = 25c C 51 64 ma output voltage v cmout common mode C v cc - v out Cv input voltage v cmin common mode 1.4 + v ddi /2 Cv cc - v ddi /2 v sd/hd input v ih i ih <= 10ua 2.0 C C v v il i il <= 10ua C C 0.8 v
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 5 of 14 2.3 ac electrical characteristics table 2-3 shows the ac electrical characteristics of the gs1528b where conditions are v cc = 3.3v 5%, t a = 0c to 70c, unless otherwise shown. table 2-3: ac electrical characteristics parameter symbol conditions min ty p max units notes serial input data rate dr sdo C C C 1.485 gb/s 1 additive jitter C 1.485gb/s C 20 C ps p-p C C 270mb/s C 16 C ps p-p C rise/fall time t r , t f sd/hd =0 C C 220 ps 2 t r , t f sd/hd =1 400 C 800 ps 2 mismatch in rise/fall time u t r , u t f CCC30psC duty cycle distortion C sd/hd =0 C C 30 ps 3 C sd/hd =1 C C 100 ps 3 overshoot C sd/hd =0 C C 10 % 3 C sd/hd =1 C C 8 % 3 output return loss orl C 15 20 C db 4 output voltage swing v out r set = 750 750 800 850 mv p-p 3 input voltage swing u v ddi differential 300 C 2200 mv p-p C notes: 1. the input coupling capacitor must be set accordingly for lower data rates. 2. rise/fall time measured between 20% and 80%. 3. single ended into 75 external load. 4. orl depends on board design. the gs1528b achieves this specification on gennum's evaluation boards.
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 6 of 14 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 pb reflow profile is shown in figure 3-2 . figure 3-1: maximum pb-free solder reflow profile (preferred) figure 3-2: standard pb reflow profile 25c 150c 200c 217c 260c 250c time temperature 8 min. max 60-180 sec. max 60-150 sec. 20-40 sec. 3c/sec max 6c/sec max 25c 100c 150c 183c 230c 220c time temperature 6 min. max 120 sec. max 60-150 sec. 10-20 sec. 3c/sec max 6c/sec max
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 7 of 14 4. input / output circuits figure 4-1: differential input stage (ddi/ ddi ) figure 4-2: differential output stage (sdo/ sdo ) i ref derived using r set figure 4-3: slew rate select input stage v cc v cc ddi ddi 10k 10k 5k 10k v cc i ref sdo sdo sd/hd v cc on chip reference
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 8 of 14 5. detailed description 5.1 input interfacing ddi /ddi are high impedance differential inputs. th e equivalent input circuit is shown in figure 4-1 . 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 table 2.2 . ? for input trace lengths longer than approximately 1cm, the inputs should be terminated as shown in the typical application circuit. the gs1528b inputs are self-biased, allowing for simple ac coupling to the device. for serial digital video, a minimum capacitor value of 4.7 f should be used to allow coupling of pathological test signals. a tantalum capacitor is recommended. sd/hd input pin the gs1528b sdo rise and fall times can be set to comply with both smpte 259m/344m and smpte 292m. for all smpte 259m standards, or any data rate that requires longer rise and fall time characteristics, the sd/hd pin must be set high by the application layer. for smpte 292m standards and signals which require faster rise and fall times, this pin should be set low. 5.2 output interfacing the gs1528b outputs are current mode, and will drive 800mv into a 75 load. these outputs are protected from accidental static damage with internal esd protection diodes. the smpte 292m, smpte 344m and smpte 259m standards require that the output of a cable driver have a source impedance of 75 and a return loss of at least 15db between 5mhz and 1.485ghz. in order for a ddi output circuit using the gs1528b to meet this specification, the output application circuit shown in the typical application circuit on page 11 is recommended. the value of l comp will vary depending on the pcb layout, with a typical value of 5.6nh . a 4.7 f 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 11 for more details.
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 9 of 14 figure 5-1: output signal for 270mb/s input figure 5-2: output signal for 1.485gb/s input the output protection diodes act as a varactor (voltage controlled capacitor) as shown in figure 5-3 . therefore, when measuring return loss at the gs1528b output, it is necessary to take the measurement for both a logic high and a logic low output condition. consequently, the output capacitance of the device is dependent on the logic state of the output. tek stopped: 8110 acquisitions tek running: normal
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 10 of 14 figure 5-3: static protection diodes 5.3 output return loss measurement to perform a practical return loss measurement, it is necessary to force the gs1528b output to a dc high or low condition. the actual measured return loss will be based on the outputs being static at v cc or v cc -1.6v. under normal operating conditions the outputs of the device swing between v cc -0.4v and v cc -1.2v. 5.4 output amplitude adjustment the output amplitude of the gs1528b can be adjusted by changing the value of the r set resistor as shown in table 5-1 . for an 800mv p-p output with a nominal 7% tolerance, a value of 750 is required. a 1% smt resistor should be used. the r set resistor is part of the high speed output circuit of the gs1528b. the resistor should be placed as close as possible to the r set pin. in addition, the pcb capacitance should be minimized at this node by removing the pcb groundplane beneath the r set resistor and the r set pin. sdo sdo gs1528b table 5-1: r set vs v od r set r ( ) output swing (mvp-p) 995 608 824 734 750 800 680 884 573 1040 note: for reliable operation of the gs1528b over the full temperature range, do not use an r set value below 573 .
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 11 of 14 6. application information 6.1 pcb layout special attention must be paid to component layout when designing serial digital interfaces for hdtv. 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 hd rate signals is closely matched to smt component width to minimize reflections due to changes in trace impedance. ? the pcb groundplane is removed under the gs1528b output components to minimize parasitic capacitance. ? the pcb ground plane is removed under the gs1528b r set 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. 6.2 typical application circuit figure 6-1: gs1528b typical application circuit sd/hd gs1528b 1 2 3 4 8 7 6 5 ddi ddi vee rset sdo sdo sd/hd vcc 10n 75 5.6n 4u7 bnc vcc 75 5.6n 10n 75 4u7 49.9 750 10n 49.9 4u7 75 bnc vcc 4u7 vcc * typical value varies with layout differential data input * * note: all resistors in ohms, capacitors in farads, and inductors in henrys, unless otherwise noted.
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 12 of 14 7. package and ordering information 7.1 package dimensions figure 7-1: gs1528b package dimensions 7.2 packaging data 0.010 q2 l detail a c 0.015 0.004 x 45 detail a q1 b a a1 e x d e pin 1 id mark g au g e plane s eatin g plane note s : 1. all d imensions in in c hes unless otherwise state d . 2. lea d c oplanarity shoul d b e 0 to 0.004 max. 3. pa c ka g e surfa c e finishin g : vdi 24~27 ( d ual). pa c ka g e surfa c e finishin g : vdi 13~15 (1 6 l s oi c [nb] matrix). 4. all d imensions ex c lu d e mol d flashes. 5. the lea d wi d th (b) to b e d etermine d at 0.0075 from the lea d tip. 8 s oi c min. max. s ymbol a a1 b d e h e c l x q2 q1 0.054 0.0 6 8 0.004 0.0098 0.014 0.019 0.189 0.19 6 0.157 0.244 0.229 0.150 0.050 b sc 0.0075 0.0098 0.01 6 0.034 0.0215 ref 0 8 7 b sc table 7-1: packaging data parameter value package type 8-pin soic moisture sensitivity level 2 junction to case thermal resistance, j-c 72c/w junction to air thermal resistance, j-a (at zero airflow) 116c/w pb-free and rohs compliant yes
gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 13 of 14 7.3 marking diagram figure 7-2: gs1528b marking diagram 7.4 ordering information g gs1528b xxxxe3 yyww xxxx - lot/work order id yyww - date code yy - 2-digit year ww - 2-digit week number table 7-2: ordering information part number package temperature range gs1528b gs1528bckae3 8-pin soic 0c to 70c gs1528b GS1528BCTAE3 250pc tape & reel 8-pin soic 0c to 70c
ottawa 232 herzberg road, suite 101 kanata, ontario k2k 2a1 canada phone: +1 (613) 270-0458 fax: +1 (613) 270-0429 calgary 3553 - 31st st. n.w., suite 210 calgary, alberta t2l 2k7 canada phone: +1 (403) 284-2672 united kingdom north building, walden court parsonage lane, bishops stortford hertfordshire, cm23 5db united kingdom phone: +44 1279 714170 fax: +44 1279 714171 india #208(a), nirmala plaza, airport road, forest park s q uare bhubaneswar 751009 india phone: +91 (674) 653-4815 fax: +91 (674) 259-5733 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 mexico 288-a paseo de maravillas jesus ma., aguascalientes mexico 20900 phone: +1 (416) 848-0328 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 ta i w a n 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 germany hainbuchenstra?e 2 80935 muenchen (munich), germany phone: +49-89-35831696 fax: +49-89-35804653 e-mail: gennum-germany@gennum.com 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 korea 8f jinnex lakeview bldg. 65-2, bangidong, songpagu seoul, korea 138-828 phone: +82-2-414-2991 fax: +82-2-414-2998 e-mail: gennum-korea@gennum.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. gs1528b hd-linx? ii multi-rate dual slew-rate cable driver data sheet 39623 - 4 august 2010 14 of 14 14 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 o r 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. ? copyright 2004 gennum corporation. all rights reserved. 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

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