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www.gennum.com GS9077 hd-linx? iii sd-sdi cable driver GS9077 data sheet 44619 - 0 may 2007 1 of 14 features ? smpte 344m and smpte 259m compliant ? dual coaxial cable driving outputs ? selectable power down mode ?50 ? 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: 0c to 70c applications ? smpte 344m and smpte 259m coaxial cable serial digital interfaces. description the GS9077 is a high-speed bi cmos integrated circuit designed to drive one or two 75 ? co-axial cables. 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. the GS9077 accepts a lvpec l 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. functional block diagram sdo r set sdo ddi ddi bandgap reference and biasing circuit output stage & control input differential pair disable
GS9077 data sheet 44619 - 0 may 2007 2 of 14 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
GS9077 data sheet 44619 - 0 may 2007 3 of 14 1. pin out 1.1 pin assignment figure 1-1: 16-pin qfn 1.2 pin descriptions center pad (bottom of package) GS9077 (top view) 1 v ee ddi ddi 2 3 4 sdo sdo vcc 12 11 10 9 5 7 68 nc nc nc nc 13 14 15 16 nc disable nc rset nc rsvd table 1-1: pin descriptions pin number name timing type description 1,2 ddi, ddi analog input serial digital differential input. 3v ee ? power most negative power suppl y connection. connect to gnd. 4r set analog input external output amplitude control resistor. 5,8,10,13,14, 15,16 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 v cc through the pull-up resistor. 7 rsvd ? reserved do not connect. 9v cc ? power most positive power suppl y 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 .
GS9077 data sheet 44619 - 0 may 2007 4 of 14 2. electrical characteristics 2.1 absolute maximum ratings 2.2 dc electrical characteristics 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 note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condi tions or at any other condition beyond those indicated in the ac/dc electrical char acteristic sections is not implied. table 2-1: dc electrical characteristics v cc = 3.3v 5%; t a = 0c to 70c, unless otherwise shown parameter symbol conditions min typ max units supply voltage v cc ? 3.135 3.3 3.465 v power consumption p d t a = 25c, sdo/sdo enabled ? 168 ? mw t a = 25c, sdo/sdo disabled ?96 ?mw supply current i s t a = 25c, sdo/sdo enabled ?51 ?ma t a = 25c, sdo/sdo disabled ?29 ?ma output voltage v cmout common mode ? v cc - v out ?v input voltage v cmin common mode 1.4 + ? v ddi /2 ? v cc - ? v ddi /2 v disable input v ih i ih <= 10 ua 2.0 ? ? v v il i il <= 10 ua ? ? 0.8 v
GS9077 data sheet 44619 - 0 may 2007 5 of 14 2.3 ac electrical characteristics table 2-2: ac electrical characteristics v cc = 3.3v 5%; t a = 0c to 70c, unless otherwise shown parameter symbol conditions min typ max units notes serial input data rate dr sdo ? ? ? 540 mb/s 1 additive jitter ? 270mb/s ? 16 ? ps p-p ? rise/fall time t r , t f ? 400 ? 800 ps 2 mismatch in rise/fall time u t r , u t f ? ? ?35ps ? duty cycle distortion ? ? ? ? 100 ps 3 overshoot ? ? ? ? 8 % 3 output return loss orl ? 15 23 ? 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 ? 2200 mv p-p ? 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 GS9077 achieves this specification on g ennum's evaluation boards.
GS9077 data sheet 44619 - 0 may 2007 6 of 14 2.4 solder reflow profiles the device is manufactured with matte-sn te rminations and is compatible with both standard eutectic and pb-free solder re flow 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 . figure 2-1: maximum pb-free solder reflow profile (preferred) figure 2-2: standard pb reflow profile 25?c 1 50?c 2 00?c 2 17?c 2 60?c 2 50?c tim e temperature 8 min. max 60-180 sec. max 60-150 sec. 20-40 sec. 3?c/sec max 6?c/sec max 25?c 1 00?c 1 50?c 1 83?c 2 30?c 2 20?c tim e t emperature 6 min. max 120 sec. max 60-150 sec. 10-20 sec. 3?c/sec max 6?c/sec max
GS9077 data sheet 44619 - 0 may 2007 7 of 14 3. input / output circuits figure 3-1: differential input stage (ddi/ddi ) figure 3-2: differential output stage (sdo/sdo ) v cc v cc ddi ddi 10k 10k 5k 10k v cc i ref sdo sdo
GS9077 data sheet 44619 - 0 may 2007 8 of 14 4. detailed description 4.1 input interfacing d di/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 capacito r value of 4.7f should be used to allow coupling of pathological test signals. a tantalum capacitor is recommended. 4.2 output interfacing the GS9077 outputs are cu rrent mode, and will drive ty pically 800mv into a 75 ? load. these outputs are protected from acci dental 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 l comp will vary depending on the pcb layout, with a typical value of 5.6nh . a 4.7f capacitor is used for ac c oupling 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 in formation on page 10 for more details.
GS9077 data sheet 44619 - 0 may 2007 9 of 14 4.2.1 output amplitude (rset) the output amplitude of the GS9077 can be adjusted by changing the value of the r set resistor as shown in table 4-1 . 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 GS9077. the resistor should be placed as close as possible to the r set pin. in addition, the pcb capacitance should be minimized at th is node by removing the pcb groundplane beneath the r set resistor and the r set pin. 4.2.2 output disable the serial output disable (disable ), disables power to the current mode serial digital output driver. when asserted lo w, the sdo/sdo output driver is powered off. sdo/sdo will float to v cc 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 conditio n. the actual measur ed return loss will be based on the output s 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. table 4-1: 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 GS9077 over the full temperature range, do not use an r set value below 573 ? .
GS9077 data sheet 44619 - 0 may 2007 10 of 14 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 reflection s 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 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 bn c mounting via high speed traces which are curved to minimize impedance variations due to change of pcb trace width. 5.2 typical application circuit figure 5-1: typical ap plication circuit GS9077 1 2 3 4 12 11 9 ddi ddi vee rset sdo sdo vcc 10n 75 5.6n 4.7u bnc vcc 75 5.6n 10n 75 4.7u 49.9 750 10n 49.9 4.7u 75 bnc vcc 4.7u vcc * typical value: varies with layout differential data input * * note: all resistors in ohms, capacitors in farads, and inductors in henrys, unless otherwise noted. disable 6 disable
GS9077 data sheet 44619 - 0 may 2007 11 of 14 6. package & ordering information 6.1 package dimensions 4.00+/-0.05 b 4.00+/-0.05 2x 2x 0.15 0.15 c c 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 0.65 16x 0.35+/-0.05 0.10 0.05 c a b c datum a 2.76+/-0.10 0.40+/-0.05 2.76+/-0.10 detail b center tab pin 1 area a c
GS9077 data sheet 44619 - 0 may 2007 12 of 14 6.2 recommended pcb footprint 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 0.35 0.55 2.76 3.70 2.76 3 .70 note: all dimension s are in millimeters. 0.65 center pad parameter value package type 4mm x 4mm 16-pin qfn package drawing reference jedec m0220 moisture sensitivity level 3 junction to case thermal resistance, j-c 31.0c/w junction to air thermal resistance, j-a (at zero airflow) 43.8c/w psi, 11.0c/w pb-free and rohs compliant yes
GS9077 data sheet 44619 - 0 may 2007 13 of 14 6.4 marking diagram 6.5 ordering information gs907 7 xxxxe 3 yyw w xxxx - lot/work order id yyww - date code yy - 2-digit year ww - 2-digit week numb er pin 1 indicator part number package temperature range GS9077 GS9077cne3 16-pin qfn 0c to 70c
caution electrostatic sensitive devices do not open packages or handle except at a static-free workstation 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, nish i 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 GS9077 data sheet 44619 - 0 may 2007 14 14 of 14 document identification data sheet the product is in production. gennum reserves the right to make changes to the product at any time wit hout notice to improve reliability, function or design, in order to provide the best product possible. 7. revision history version ecr pcn date changes and/or modifications 0 144889 ? may 2007 new document.

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