specifications are subject to change without notice. customers should verify actual device performance in their specific applications. thin film on silicon 2qsp / 2nbs-xx3 dual terminator features rohs compliant* multiple scsi termination resistors stable thin-film-on-silicon technology ultra-miniature packages to jedec standards applications single-ended scsi termination scsi host adaptor cards all scsi bus devices general information dual terminator networks are used to correctly terminate single-ended scsi bus lines. the standard r1, r2 combina- tion ensures that the high frequency component of a signal transition will see an impedance at the termination equal to the characteristic impedance of the line. fabricated with tantalum nitride on silicon, these resistors feature excellent stability, tcr and tracking performance. the jedec standard miniature packages offer the most space-efficient dual terminator resistor array available. package schematic 16 1 9 8 r1 r1 r2 r2 electrical characteristics symbol minimum nominal maximum unit resistance range r 220 750 ? tolerance: absolute ? % ? % ? ratio ?.5 % ? % ? tcr: absolute 100 ppm/? tracking 25 ppm/? operating voltage 50 v environmental characteristics esd 2 k v operating temperature t j -55 +125 ? storage temperature t stg -65 +150 ? power rating per resistor @ 70 ? 0.1 watt power rating per package @ 70 ?: qsop: 16 pin 0.75 watt 20, 24 pin 1.00 watt 28 pin 1.12 watt nbsoic: 8 pin 0.60 watt 14, 16 pin 1.00 watt electrical & environmental characteristics *rohs compliant *rohs directive 2002/95/ec jan 27, 2003 including annex models 2qsp-xx3 and 2nbs-xx3 are obsolete and not recommended for new designs. obsolete
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. thin film on silicon 2qsp / 2nbs -xx3 dual terminator a .635 (.025) typ. 3.81 - 3.99 (.150 - .157) pin 1 .21 - .31 (.008 - .012) 1.35 - 1.75 (.053 - .069) .10 - .25 (.004 - .010) 0-8 .19 - .25 (.007 - .010) .41 - 1.27 (.016 - .050) 5.80 - 6.20 (.228 - .244) 3.81 - 3.99 (.150 - .157) a 1.27 (.050) typ. pin 1 0.36 - 0.46 (.014 - .018) 1.35 - 1.75 (.053 - .069) .10 - .25 (.004 - .010) 0-8 .19 - .25 (.007 - .010) 5.80 - 6.20 (.228 - .244) .41 - 1.27 (.016 - .050) model a 2qsp16 4.80 - 4.98 (.189 - .196) 2qsp20 8.56 - 8.74 (.337 - .344) 2qsp24 8.56 - 8.74 (.337 - .344) 2qsp28 9.80 - 9.98 (.386 - .393) governing dimensions are in mm. dimensions in parentheses are in inches and are approximate. jedec reference number mo-137. model a 2nbs08 4.80 - 4.98 (.189 - .196) 2nbs14 8.56 - 8.74 (.337 - .344) 2nbs16 9.80 - 9.98 (.386 - .393) governing dimensions are in mm. dimensions in parentheses are in inches and are approximate. jedec reference number ms-012. mechanical characteristics qsop package dimensions narrow-body soic package dimensions obsolete
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. watts ambient temperature ( c ) 1.0 1.25 .75 .50 .25 2qsp16 2qsp20, 2qsp24 2qsp28 0 50 75 100 125 150 25 watts ambient temperature ( c ) 1.0 .8 .6 .4 .2 0 75 100 125 150 25 50 2nbs14, 2nbs16 2nbs08 thin film on silicon 2qsp / 2nbs -xx3 dual terminator qsop package power temperature derating curve schematic narrow-body soic package power temperature derating curve standard resistance values resistor resistance resistance designator (ohms) code r1 220 221 r2 330 331 r1 330 331 r2 680 681 r1 750 751 r2 750 751 typical part marking r 1 r 2 r 1 r 2 8 pin 14 pin 16 pin 20 pin 24 pin 28 pin represents total content. layout may vary. grade pin count 3-221331 qsp16j yyww model circuit resistance code date code manufacturer's trademark pin 1 indicator (molded indent) obsolete
specifications are subject to change without notice. customers should verify actual device performance in their specific applications. thin film on silicon 2qsp / 2nbs -xx3 dual terminator dispensing for large quantities, the product will be dispensed in tape and reel (see diagram below). no. of pieces no. of pieces package a 0 b 0 k 0 width pitch per 13 reel per tube qsop 16 pin 6.4 (0.252) 5.2 (0.205) 2.1 (0.083) 12 (0.472) 8 (0.315) 3,500 98 20, 24 pin 6.5 (0.256) 9.0 (0.354) 2.1 (0.083) 16 (0.630) 8 (0.315) 3,500 56 28 pin 6.5 (0.256) 10.3 (0.406) 2.1 (0.083) 16 (0.630) 8 (0.315) 3,500 49 nbsoic 8 pin 6.4 (0.252) 9.0 (0.354) 2.1 (0.083) 12 (0.472) 8 (0.315) 3,500 98 14 pin 6.5 (0.256) 9.0 (0.354) 2.1 (0.083) 16 (0.630) 8 (0.315) 3,500 56 16 pin 6.5 (0.256) 9.0 (0.354) 2.1 (0.083) 16 (0.630) 8 (0.315) 3,500 49 how to order 2 qsp 20 - t j 3 221331 lf product class thin-film-on-silicon standard package style qsp = qsop nbs = narrow-body soic pin count qsp = 16, 20, 24, 28 nbs = 8, 14, 16 dispensing r = reel t = tube standard grade t olerance j = ? % g = ? % f = ? % circuit 3 = dual terminator resistance value code 1st three digits specify r1 resistance code. last three digits specify r2 resistance code. terminations ?lf = 100 % sn (rohs compliant) rev. 11/10 a 0 b 0 k 0 dimensions = mm (inches) asia-pacific: tel: +886-2 2562-4117 ?fax: +886-2 2562-4116 europe: tel: +41-41 768 5555 ?fax: +41-41 768 5510 the americas: tel: +1-951 781-5500 ?fax: +1-951 781-5700 www.bourns.com obsolete
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