description designed specifically for use in auto- matic test equipment where a variable transmitter output level is required, the ddc model bus-8559 transceiv- er is a complete transmitter and receiver conforming to mil standards 1553a and 1553b. the receiver section accepts phase- modulated bipolar data at the input and produces a bi-phase ttl signal at the output, see figure 1. outputs, data and data, are posi- tive and negative excursions of the input beyond an internally fixed threshold. the positive and negative thresholds are internally set at the factory for a nominal 1 v pk-pk signal, when measured at point a in fig- ure 2. an external strobe input is provided which allows the the receiv- er to be removed from the line. a logic 0 applied to receiver strobe will disable the receiver output. the bus-8559 transmitter section accepts bi-phase ttl data at the input and produces a nominal 0 to 27 v pk-pk differential output across a 145 w load. when the transmitter is coupled to the data bus with the spec- ified transformer*, and isolated (on the data side) with two 55 w fault isolation resistors, and loaded with two 70 w terminations (plus additional receivers), the data bus signal pro- duced is a nominal 0 to 7.5 v pk-pk when measured at the output side of the 55 w resistors. when both data and data, inputs are held low or high, the transmitter presents a high impedance to the line. an external inhibit input is also provided, which allows the the trans- mitter output to be removed from the line.. when a logic 1 is applied to the tx inhibit input, the transmitter is disabled, and the data inputs are ignored. application the bus-8559 is suitable for any mil-std-1553 application which requires a transceiver. the bus-8559 comes in a hermetic, 24-pin ddip package which measures 1.4 x 0.8 x 0.2 inches. variable output mil-std-1553 transceiver features ? variable transmitter output ? transmitter/receiver in a single 24-pin ddip hybrid ? very low power dissipation ? improved receiver filtering enhances system bit error rate ? meets mil-std-1553a and 1553b ? power supplies: 15 v or +15 v and -12 v +5 var v (o to +15 v) receiver strobe rx data rx data comparator comparator filter transceiver limiter driver driver shaping network shaping network data tx data tx data tx inhibit -15 +15 bus-8559 bus-25679 transformer data cc bus-8559 block diagram bus-8559 ? 1999 data device corporation
+5 v +15 v -15 v vcc 25 max 30 max 30 max 0 22 max 30 max 30 max 70 21 max 30 max 30 max 180 specifications for bus-8559 hybrid with bus-25679 transformer parameter power supplies requirements receiver section input level input impedance threshold level output levels outputs: v ol v oh i ol i oh transmitter section input levels inputs: v ih v il i ih i il output level rise/fall time output noise variable vcc temperature range operating (case temp.) storage -55c to +125c -55c to +135c 40 v pk-pk differential max 4 k w differential min 1 v pk-pk nominal, internally set (direct mode) ttl, 10 ls loads 0.6 v max 2.5 v min 4 ma max -400 a max physical characteristics size (24-pin ddip hybrid) weight value p.s. volts stdby ma 25% ma 100% ma 1.4 x 0.8 x 0.2 inches (36 x 20 x 5 mm). 0.4 oz ( 11 g ) note: this unit will also operate with 12 v p.s. ttl, 2 ls loads 2 v min 0.8 v max 80 a max -3.2 ma 0-27 v pk-pk nominal across 145 w load 0-20 v pk-pk nominal (measured at output of bus-25679 xfmr output - xfmr coupled stub) 130 nsec typ 10 mv pk-pk differential max 0 to +15 v dc bottom view .020 .002 (0.5 0.1) 1 2 3 8 7 6 5 4 .200 .005 (5.1 0.1) .63 max side view .500 .005 (13 0.1) .63 max (16.0) .275 max (7.0) .250 min (6.3) terminal identification this side notes: 1. all dimensions are in inches (millimeters). 2. pin callouts on bottom view are for reference onl y . 0.750 max (19.05) 0.6000.002 (15.2 0.05) 1.390 max (33.02) 12 eq.sp. 0.100=1.100 tol. noncum (2.5=27.9) 0.150 max (3.81) 0.250 min (6.35) 0.100 (2.54) 0.020 0.51 dia pin 0.016 0.41 24 places bottom view side view 0.095 (2.41) 124 13 12 bus-25679 transformer outline bus-8559 mechanical outline bus-8559 pin function table 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 pin function tx data out tx data out gnd n.c. n.c. variable vcc rx data out strobe gnd rx data out n.c. n.c. +15v dc n.c. rx data in rx data in n.c. gnd -15v dc +5v dc tx inhibit tx data in tx data in n.c. function pin 2
ordering information bus-8559-xx0x supplemental process requirements: s = pre-cap source inspection l = pull test q = pull test and pre-cap inspection blank = none of the above process requirements: 0 = standard ddc processing, no burn-in (see page xiii.) 1 = mil-prf-38534 compliant 2 = b* 3 = mil-prf-38534 compliant with pind testing 4 = mil-prf-38534 compliant with solder dip 5 = mil-prf-38534 compliant with pind testing and solder dip 6 = b* with pind testing 7 = b* with solder dip 8 = b* with pind testing and solder dip 9 = standard ddc processing with solder dip, no burn-in (see page xiii.) temperature grade/data requirements: 1 = -55c to +125c 2 = -40c to +85c 3 = 0c to +70c 4 = -55c to +125c with variables test data 5 = -40c to +85c with variables test data 8 = 0c to +70c with variables test data note: the transceiver and transformer must be ordered as separate parts. transformer p/n: bus-25679 3
4 j-abr printed in the u.s.a. the information in this data sheet is believed to be accurate; however, no responsibility is assumed by data device corporation for its use, and no license or rights are granted by implication or otherwise in connection therewith. specifications are subject to change without notice. 105 wilbur place, bohemia, new york 11716-2482 for technical support - 1-800-ddc-5757 ext. 7257 or 7381 headquarters - tel: (631) 567-5600 ext. 7257 or 7381, fax: (631) 567-7358 southeast - tel: (703) 450-7900, fax: (703) 450-6610 west coast - tel: (714) 895-9777, fax: (714) 895-4988 europe - tel: +44-(0)1635-811140, fax: +44-(0)1635-32264 asia/pacific - tel: +81-(0)3-3814-7688, fax: +81-(0)3-3814-7689 world wide web - http://www.ddc-web.com ilc data device corporation registered to iso 9001 file no. a5976
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