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www.gennum.com GS9064A hd-linx? ii adaptive cable equalizer GS9064A data sheet 37325 - 0 december 2005 1 of 16 features ? smpte 259m compliant ? automatic cable equalization ? supports dvb-asi at 270mb/s ? 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 ?50 differential output (with internal 50 pull-ups) ? manual output mute or programmable mute based on max cable length adjust ? cable length indicator for smpte 259m inputs ? single 3.3v power supply operation ? operating temperature range: 0c to +70c applications ? smpte 259m coaxial cable serial digital interfaces. description the GS9064A is a second-generation high-speed bicmos integrated circuit designed to equalize and restore signals received over 75 co-axial cable . the GS9064A is designed to support smpte 259m, and is optimized for performance at 270mb/s. the GS9064A features dc restoration to compensate for the dc content of smpte pathological test patterns. the device also incorporates a cable length indicator (cli) that provides an indication of the amount of cable being equalized. a voltage programmable mute threshold (mcladj) is included to allow muting of the GS9064A output when an approximate selected cabl e length is reached for smpte 259m signals. this feature allows the GS9064A to distinguish between low amplitude sd-sdi signals and noise at the input of the device. the bidirectional cd /mute pin indicates the presence of a valid signal at the inpu t of the GS9064A in addition to functioning as a mute control input. the outputs of the GS9064A will be forced to a mute state when an invalid input reference signal is applied to the input of the device or the application layer sets the cd /mute pin high. if the application layer forces cd /mute low, the serial digital output of the device will always be active. power consumption is typically 265mw using a 3.3v power supply. the GS9064A is pb-free, and the encapsulation compound does not contain halogenated flame retardant (rohs compliant).
GS9064A data sheet 37325 - 0 december 2005 2 of 16 GS9064A functional block diagram contents features ....................................................................................................................... .1 applications................................................................................................................... 1 description .................................................................................................................... 1 1. pin out ..................................................................................................................... .3 1.1 GS9064A pin assignment ... .............. .............. .............. .............. ........... ........3 1.2 GS9064A pin descriptions .. .............. .............. .............. .............. ........... ........4 2. electrical characteristics ...........................................................................................5 2.1 absolute maximum ratings ............................................................................5 2.2 dc electrical characteristics ............... ...........................................................5 2.3 ac electrical characteristics .............. .............................................................6 2.4 solder reflow profiles .....................................................................................7 3. input / output circuits ............................... ................................................................9 4. detailed description .................................. ..............................................................11 4.1 serial digital inputs .......................................................................................11 4.2 cable equalization ......... .............. .............. .............. .............. .............. .........11 4.3 programmable mute output and cable length indicator ...... .............. .........12 4.4 mute and carrier detect ................................................................................13 5. application information............................................................................................14 5.1 typical application circuit .............................................................................14 6. package & ordering information .............................................................................15 6.1 package dimensions ....................................................................................15 6.2 packaging data .............................................................................................15 6.3 ordering information .....................................................................................15 7. revision history ......................................................................................................16 cable length indicator/adjustor carrier detect mute equalizer dc restore output agc cli cd/mute sdo bypass sdo sdi sdi mcladj
GS9064A data sheet 37325 - 0 december 2005 3 of 16 1. pin out 1.1 GS9064A pin assignment figure 1-1: 16-pin soic cli v cc v ee sdi sdi v ee agc+ agc- cd/mute v cc v ee sdo sdo v ee mcladj bypass GS9064A 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 (top view)
GS9064A data sheet 37325 - 0 december 2005 4 of 16 1.2 GS9064A pin descriptions table 1-1: GS9064A pin descriptions pin number name timing type description 1 cli analog output cable length indicator. an analog voltage will be output proportional to the cable length connected to the serial digital input. 2, 15 v cc analog power most positive power supply connection. connect to +3.3v dc. 3, 6, 11, 14 v ee analog power most negative power supply connection. connect to gnd. 4, 5 sdi, sdi analog input serial digital differential input. 7, 8 agc+, agc- analog ? external agc capacitor. connect pin 7 and pin 8 together through a 1uf capacitor. 9 bypass not synchronous input forces the equalizing and dc restore stages into bypass mode when high. no equalization occurs in this mode. 10 mcladj analog input maxim um 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. 12, 13 sdo , sdo analog output equalized serial digital differential output. 16 cd /mute not synchronous bidirectional status signal output / control signal input levels are lvcmos/lvttl compatible. output (cd ): indicates the presence of a valid input signal. when the cd pin is low, a valid input signal has been detected. when this pin is high, the input signal is invalid. if cd is set high, the serial digital output of the device will be forced to a steady state (latched to the last state). note: this pin will indicate loss of carrier for data rates > 19mb/s. input (mute): 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 (latched to the last state). when the mute pin is set low, the serial digital output of the device will be active. note: the cd /mute pin is not functional when bypass is set high.
GS9064A data sheet 37325 - 0 december 2005 5 of 16 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 2kv 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 reflow temperature 260c table 2-1: dc electrical characteristics v dd = 3.3v, t a = 0c to 70c, unless otherwise shown parameter symbol conditions min typ max units notes supply voltage v cc ? 3.135 3.3 3.465 v 5% power consumption p d t a = 25c ? 265 ? mw ? supply current i s t a = 25c ? 80 ? ma ? output common mode voltage v cmout t a = 25c ? v cc - v sdo /2 ? v ? input common mode voltage v cmin t a = 25c ? 1.75 ? v ? cli dc voltage (0m) ? t a = 25c ? 2.5 ? v ? cli dc voltage (no signal) ? t a = 25c ? 1.9 ? v ? mcladj dc voltage (to mute signal) ?0m, t a = 25c ? 1.3 ? v ? mcladj range ? t a = 25c ? 0.4 ? v ? cd /mute output voltage v cd /mute(oh) carrier not present 2.4 ? ? v ? v cd /mute(ol) carrier present ? ? 0.4 v ?
GS9064A data sheet 37325 - 0 december 2005 6 of 16 2.3 ac electrical characteristics cd /mute input voltage required to force outputs to mute v cd /mute mute 2.0 ? ? v ? cd /mute input voltage required to force outputs active v cd /mute activate ? ? 0.8 v ? table 2-1: dc electrical characteristics v dd = 3.3v, t a = 0c to 70c, unless otherwise shown parameter symbol conditions min typ max units notes table 2-2: ac electrical characteristics v dd = 3.3v, t a = 0c to 70c, unless otherwise shown parameter symbol conditions min typ max units notes serial input data rate dr sdo ? 143 ? 270 mb/s ? input voltage swing v sdi t a =25c, differential 720 800 950 mv p-p 1 output voltage swing v sdo 100 load, t a =25c, 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 output rise/fall time ? 20% - 80% ? 80 220 ps ? mismatch in rise/fall time ? ? ? ? 30 ps ? duty cycle distortion ? ? ? ? 100 ps ? overshoot ? ? ? ? 10 % ? input return loss ? ? 15 ? ? db ? input resistance ? single ended ? 1.64 ? k ? input capacitance ? single ended ? 1 ? pf ? output resistance ? single ended ? 50 ? ? notes: 1. 0m cable length. 2. equalizer pathological.
GS9064A data sheet 37325 - 0 december 2005 7 of 16 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 eutectic reflow profile is shown in figure 2-2 . figure 2-1: maximum pb-free solder reflow profile (preferred) figure 2-2: 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
GS9064A data sheet 37325 - 0 december 2005 8 of 16 figure 2-3: test circuit gigabert 1400 ext. clock clock out data out ext. clock 270mhz GS9064A test board tds 820 ch. 1 ch. 2 out in out ext. trigger 50/75 8281 or 1694a cable
GS9064A data sheet 37325 - 0 december 2005 9 of 16 3. input / output circuits figure 3-1: input equivalent circuit figure 3-2: mcladj equivalent circuit figure 3-3: output circuit 3k 3.6k 3k 3.6k rc sdi sdi v cc mcladj 12.2k 150 + - 50 50 sdo sdo
GS9064A data sheet 37325 - 0 december 2005 10 of 16 figure 3-4: cli output circuit figure 3-5: cd /mute circuit figure 3-6: bypass circuit 10k 10k v cc cli - + cd/mute bypass
GS9064A data sheet 37325 - 0 december 2005 11 of 16 4. detailed description the GS9064A is a high speed bicmos ic designed to equalize serial digital signals. the GS9064A can equalize both hd and sd serial digital signals, and will typically equalize greater than 350m at 270mb/s. the GS9064A/ is powered from a single +3.3v power supply and consumes approximately 265mw of power. 4.1 serial digital inputs the serial data signal may be con nected to the input pins (sdi/sdi ) in either a differential or single ended configurat ion. ac coupling of the inputs is recommended, as the sdi and sdi inputs are internally biased at approximately 1.8v. 4.2 cable equalization the input signal passes through a variabl e gain equalizing stage whose frequency response closely matches the inverse of th e cable loss characteristic. in addition, the variation of the frequency response with control voltage imit ates the variation of the inverse cable loss char acteristic 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 capa citor 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, th e 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 750mv pp differential, or 375mv pp single ended when terminated with 50 as shown in figure 4-1 .
GS9064A data sheet 37325 - 0 december 2005 12 of 16 figure 4-1: typical output voltage levels 4.3 programmable mute output and cable length indicator for smpte 259m inputs, the GS9064A incorporates a programmable threshold output mute (mcladj) and an analog cable length indicator (cli). mcladj in applications where ther e are multiple input channels using the GS9064A, it is advantageous to have a programmable mute output to avoid signal crosstalk. the output of the GS9064A 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. cli the output voltage of the cli pin is an approximation of the amount of cable present at the GS9064A input. with 0m of cable, 800mv input signal levels, and a data rate of 270mb/s, the cli output vo ltage is approximatel y 2.5v. as the cable length increases, the cli voltage decreases providing an approximate correlation between the cli voltage and cable length. 50 50 sdo sdo +187.5mv -187.5mv v cm = 2.925v typical +187.5mv -187.5mv v cm = 2.925v typical
GS9064A data sheet 37325 - 0 december 2005 13 of 16 4.4 mute and carrier detect in addition to the programmable mute output and cable length indicator, the GS9064A includes a multi-function cd /mute bidirectional pin that provides the following functions: input (mute) applying a high input to the cd /mute pin forces the GS9064A outputs to a muted condition. the minimum voltage required to force the outputs to a muted condition is listed in the dc electrical ch aracteristics table. in this condition the outputs will be latched to the last logic leve l present at th e output to avoid signal crosstalk. applying a low input to the cd /mute pin will force the GS9064A outputs to remain active regardless of the length of input cable and the voltage applied to the mcladj pin. see the dc electrical char acteristics table fo r voltage levels. output (cd ) when used as an output, the cd /mute pin will indicate the presence of a valid input signal. when cd /mute is low, a valid input sig nal has been detected at the input of the device. when cd /mute is high, the input signal is invalid. this pin will indicate loss of carrier for data rates greate r than 19mb/s. note: the cd /mute pin is not functional in bypass mode..
GS9064A data sheet 37325 - 0 december 2005 14 of 16 5. application information 5.1 typical application circuit figure 5-1: GS9064A typical application circuit 6.2n 10n bypass mcladj 75 sdo bnc vcc cli 1u 10n 75 4u7 4u7 GS9064A 4 5 16 6 2 12 13 3 11 14 15 8 + + + 9 10 1 7 sdi sdi cd/mute vee vcc sdo sdo vee vee vee vcc agc- bypass mcladj cli agc+ 1u sdo cd/mute 37.4 1u vcc note: all resistors in ohms, capacitors in farads, and inductors in henrys, unless otherwise noted.
GS9064A data sheet 37325 - 0 december 2005 15 of 16 6. package & ordering information 6.1 package dimensions 6.2 packaging data 6.3 ordering information symbol a a1 a2 b c d e e h l1 l y min. min. max. max. nom. nom. millimeter inch * controlling dimension: mm 1.35 0.10 1.30 0.33 0.19 9.80 3.80 5.80 0.40 0? 1.63 0.15 1.40 0.41 9.91 3.90 1.27 6.00 0.64 1.07 1.75 0.25 1.50 0.51 0.25 10.01 4.00 0.053 0.004 0.051 0.013 0.064 0.006 0.055 0.016 0.390 0.154 0.50 0.069 0.010 0.059 0.020 0.010 0.394 0.157 0? 8? 8? 6.20 1.27 0.10 0.004 0.042 0.025 0.016 0.228 0.236 0.244 0.050 0.150 0.386 0.007 d e seating plane a2 a a1 y see detail f l1 c detail f l gauge plane 0.010" h e 8 1 16 9 b parameter value package type soic 16l package drawing reference jedec ms012 moisture sensitivity level 2 junction to air thermal resistance, j-a (at zero airflow) 94.1c/w pb-free and rohs compliant yes part number package temperature range GS9064A GS9064Ackde3 pb-free 16-pin soic 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 2005 gennum corporation. all rights reserved. printed in canada. www.gennum.com GS9064A data sheet 37325 - 0 december 2005 16 16 of 16 document identification data sheet the product is in production. gennu m 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. 7. revision history version ecr pcn date changes and/or modifications 0 138614 ? december 2005 new document.

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