4 4-143 model 888, 887 electrical standard resistance range, ohms * 10 to 2meg standard resistance tolerance, at 25? -1, -3 & -5 circuits: ?% (<33 ohms = ? ohms) -6 circuit: ?% optional: ?%(f tol.) operating temperature range -55? to +125? temperature coef?ient of resistance ?00ppm/? (<100 ohms = ?50ppm/?) temperature coef?ient of resistance tracking ?0ppm/? maximum operating voltage 100vdc or pr insulation resistance 10,000 megohms environmental (per mil-r-83401) thermal shock plus power conditioning ? r 0.70% short time overload ? r 0.50% terminal strength ? r 0.25% moisture resistance ? r 0.50% mechanical shock ? r 0.25% vibration ? r 0.25% low temperature storage ? r 0.25% high temperature exposure ? r 0.50% load life, 1,000 hours ? r 1.00% resistance to solder heat (per mil-std-202, method 210, cond.b) ? r 0.25% dielectric withstanding voltage 200v for 1 minute marking permanency mil-std-202, method 215 lead solderability mil-std-202, method 208 flammability ul-94v-o rated storage temperature range -55? to +125? * plus ? ohm?jumper models 887, 888 20 &18 pin dip thick film resistor network speci?ations subject to change without notice.
4-144 model 888, 887 mechanical lead material copper alloy, 60/40 tin-lead (plating) substrate material alumina resistor material cermet .340 .020 8.64 0.51 1.080 27.43 max. model 887 .980 24.90 .250 6.35 .050 1.27 .125 3.18 max. note: unless otherwise specified, tolerances are .138 3.51 .005 0.13 .135 .030 3.43 0.76 .100 .010 2.54 0.25 .800 .010 20.32 0.25 .018 .003 0.46 0.08 .080 .020 2.03 0.51 model 888 .010 .002 0.25 0.05 typical spacing non-accumulating lead thickness: max. .015 0.38 min. .060 1.52 max. model 888 .900 .010 22.90 0.25 model 887 outline dimensions (inch/mm) applicable documents mil-r-83401 resistor networks, fixed, film, general speci cations mil-std-202 test methods for electronic and electrical component parts mil-std-105 sampling procedures and tables for inspection by attributes approved to british standard speci cation bs9450 f0001
4 4-145 model 888, 887 custom capabilities 100 80 60 40 20 0 -55 0 70 125 percent of rated power ambient temperature ( c) power derating curve r3 r2 r1 1 n/2 n circuits shown are representative of our custom circuit capability. consult ractory ror additional applications. r2 r1 r2 r1 1 n/2 n resistor (per circuit) model package -1 -3 -5 -6 887 2.50 .125 .250 .125 .125 888 2.25 .125 .250 .125 .125 power dissipation, watts at 70? 1 n n/2 1 n n/2 r1 r2 1 n n/2 r3 r2 r1 1 n n/2 888: n = 18 leads 887: n = 20 leads -6 circuit scsi terminator -5 circuit dual terminator -1 circuit bussed resistors -3 circuit isolated resistors schematics
4-146 model 888, 887 ordering information 88 7 -5- r220 / 330 f model series accuracy code (no code used for standard tolerance) f = 1% r2 resistance value (add for -5 circuit only) resistance value number of leads: 8 = 18 leads 7 = 20 leads circuit type: 1 = bussed 3 = isolated 5 = dual terminator 6 = scsi circuit packaging standard: magazines all units oriented with lead #1 to the same side. magazine: material = antistatic plastic capacity = 20 units 887-3-r10k package code # of leads 888 = 18 leads 887 = 20 leads lead #1 indicator resistance value date code (position optional) circuit type: -1 bussed circuit -3 isolated circuit -5 dual terminator -6 scsi circuit typical part marking
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