? 1/6 st1394 ieee1394 one port cable termination network with esd protection diodes rev. 2 tpbias tpa- tpa- tpb+ tpb- gnd 139 sot23-6l (plastic) october 2004 main applications ieee1394 line termination on: desktops notebooks digital camcorders external storage drive set top box features line termination for 2 twisted pairs tpa and tpb the device complies with ieee1394 require- ment for differential and common more imped- ance on tpa and tpb line monolithic device with complete termination for one ieee1394 connection description the st1394-01sc6 is an integrated termination network that optimizes board layout of the phy layer in ieee1394 one port cable application. this monolithic device is tested, according to esd requirement described in iec61000-4-2 standard level 2. st1394-01sc6 device ruggedness limits overvoltage at the 1394 tranceiver inputs and out- puts below acceptable limits. the st1394-01sc6 implements ieee1394 recommendation for line termination of tpa and tpb differential lines. excellent matching of the termination resistor will minimize common mode noise that is needed to improve communication speed. benefits resistor matching between tpa / tpb lines. resistor matching between tpa+ / tpa- single chip devise versus 11 discretes no need for additional overvoltage protection device high level of integration ipad? tpa+ tpbias gnd tpa- tpb- tpb+ r4 r1 c r3 r2 r5 lines tpa+ tpa- tpb+ tpb- rpd gnd zener capacitance names r1 r12 r3 r4 r5 c cz value 55 ? 55 ? 55 ? 55 ? 55 ? 250pf 5pf tolerance typ. typ. typ. typ. 20% 20% max. matching matching between 55 ? resistor at 1% max figure 1: pinout configuration table 1: order code part number marking st1394-01sc6 139 tm: ipad is a trademark of stmicroelectronics. obsolete product(s) - obsolete product(s)
st1394 2/6 table 2: absolute ratings (t amb = 25c) table 3: electrical characteristics (t amb = 25c) note 1: matching between 55 ? resistors is better than 1%. figure 2: functionnal diagram application information the functional diagram here above presents a ieee1394-a cable and shows how to connect the st1394-01sc6 in order to correctly terminate and filter the tpa and tpb lines. symbol parameter and test conditions value unit t stg storage temperature range - 55 to + 150 c t j maximum junction temperature + 150 c tl lead solder temperature (10 second duration) 260 c symbol parameter min. typ. max. unit r1, r2, r3, r4 bus termination resistors (note 1) 55 ? c z zener capacitance 5 pf r pd pull down resistor 5 k ? c capacitor in parallel with r pd 250 pf (r1+r2), (r3+r4) bus termination impedance 102 110 118 ? 55 ? 55 ? 55 ? 55 ? 5k ? 250pf tpbias twisted pair a twisted pair b 1m ? 0.1f 0.01f outer shied termination 1f tpa+ tpa- tpb+ tpb- minimize this distance obsolete product(s) - obsolete product(s)
st1394 3/6 technical information: frequency beh avior of data and strobe signals note: for a convenience reason, frequency response have been carried out on both tpa and tpb lines as if tpa+ and tpa- or tpb+ and tpb- were respectively inputs and outputs lines figure 3: measurement confitions figure 4: test board figure 5: tpa line: comparison between aplac model and device figure 6: tpb line: comparison between aplac model and device st1394 spectrum analyser tracking generator vg vout vin 50 ? 50 ? +5v rf test board calibration kit board 100.0k 1.0m 10.0m 100.0m 1.0g -20.00 -15.00 -10.00 -5.00 0.00 db f/hz line 1 simline 1 100.0k 1.0m 10.0m 100.0m 1.0g -50.00 -45.00 -40.00 -35.00 -30.00 -25.00 -20.00 -15.00 -10.00 -5.00 0.00 db f/hz line 2 simline 2 obsolete product(s) - obsolete product(s)
st1394 4/6 figure 7: crosstalk between tpa and tpb lines figure 8: cst1394 aplac model 100.0k 1.0m 10.0m 100.0m 1.0g -100.00 -75.00 -50.00 -25.00 0.00 db f/hz port9 port10 port11 250p 5k 55 55 55 55 ls rs lpin rpin rbond lbond ls rs port12 lpin rpin rbond lbond lbond rbond lpin rpin ls rs lbond rbond lpin rpin lframe lpin rframepin lgnd rgnd ls rs ls=1n rs=100m lpin=230p rpin=50m lbond =420p rbond =50m lframe=80p rframepin=8.6m lgnd=50p rgnd =50m cdiode=4p obsolete product(s) - obsolete product(s)
st1394 5/6 figure 9: sot23-6l package mechanical data figure 10: sot23-6l foot print dimensions (in millimeters) e h l a1 c ee b d a2 a tpbias tpa+ tpa- tpb+ tpb- agnd avdd avdd agnd gnd tpbias tpa- tpb+ tpb- tpa+ 0.60 1.20 1.10 0.95 2.30 3.50 ref. dimensions millimeters inches min. typ. max. min. typ. max. a 0.90 1.45 0.035 0.057 a1 0 0.10 0 0.004 a2 0.90 1.30 0.035 0.051 b 0.35 0.50 0.014 0.02 c 0.09 0.20 0.004 0.008 d 2.80 3.05 0.110 0.120 e 1.50 1.75 0.059 0.069 e 0.95 0.037 h 2.60 3.00 0.102 0.118 l 0.10 0.60 0.004 0.024 10 10 table 4: ordering information note: more informations are available in the application note: an1783: ?how to make fire-wire communication port safe?? ordering code marking package weight base qty delivery mode st1394-01sc6 139 sot23-6l 16.7 mg 3000 tape & reel table 5: revision history date revision description of changes jul-2003 1a first issue. 28-oct-2004 2 sot23-6l package dimensions change for reference ?d? from 3.0 millimeters (0.118 inches) to 3.05 millimeters (0.120 inches). obsolete product(s) - obsolete product(s)
st1394 6/6 information furnished is believed to be accurate and reliable. however, stmicroelectronics assu mes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replac es all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered tr ademark of stmicroelectronics. all other names are the property of their respective owners ? 2004 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com obsolete product(s) - obsolete product(s)
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