scd4419d rev j features ? dual transceiver meets military data bus requirements ? mil-std-1553 ? low standby power ? low power dissipation at full output power ? single +5v power supply ? +5v control line ? current source output ? 0.3" x 1.2", ceramic, 18 lead dip or flat package ? designed for commercial, industrial and aerospace applications ? processed and screened to mil-std-883 specifications ? aeroflex is a class h & k mil-prf-38534 manufacturer ? desc smd pending general description the aeroflex plainview model act4419d is a monolithic tr ansceiver which provides variable amplitude in full compliance with mil-std-1553 data bus requirements with low standby power consumption and one power supply operation. the dual channel model act4419d performs the front-end analog function of inputting and outputting data through a transformer to a mil-std-1553 data bus. design of these transceivers re flects particular attention to act ive filter performance. this results in low bit and word error rate with superior waveform purity and minimal zero crosso ver distortion. efficient tran smitter electrical and thermal design provides low internal power dissipation and heat rise at high as well as low duty cycles. variable amplitude is adjusted with f actory preset 0 ? 5 vdc cont rol line at 1 ma maximum input current at 5 volts. transmitter the transmitter section accepts bi-phase ttl data at the input and when coupled to the data bus with a primary grounded center tap 1:2.5 transformer the data bus signal produced is 7.1 volts nomin al p-p at a-a? (see figure 5). when both data and data inputs are held low, the transmitter output become s a high impedance and is ?removed? from the line. in addition, an overriding ?inhibit" input provides for the re moval of the transmitter output from the line. a logic ?1? applied to the ?inhibit? takes priority over the condition of the data inputs and disables the transmitter. (see transmitter logic waveform, figure 1). the transceiver utilizes an active filter to suppress harmonics above 1mhz. the transmitter may be safely operated at 100% duty cycle for an indefinite period into a short circuited 1553 bus. receiver the receiver section accepts bi-phase differential data at the input and produces two ttl signal s at the output. the outputs are data and data , and represent positive and negative excursions of the input beyond a pre-determined threshold. (see receiver logic waveform, figure 2). the pre-set internal thresholds will detect data bus signal s exceeding 1.150 volts p-p and re ject signals less than 0.6 volts p-p when used with a 1:2.5 turns ratio transformer. (see transformer data and t ypical connection, figure 5). a low level at the strobe input inhibits the data and data outputs. act4419d dual variable amplitude transceiver standard products for mil-std-1553 april 16, 2007
2 scd4419d rev j 4/16/07 aeroflex plainview data in data in inhibit line to line output notes: 1. data and data inputs must be complementary waveforms or 50% duty cycle average, with no delays between them. 2. data and data must be in the same state during off time (both low). figure 1 - transmit ter logic waveforms figure 2 - receiver logic waveforms note overlap line to line input data out data out output stage comp. comp. reference active filter driver tx data in tx data in tx inhibit +5 v strobe tx/rx tx/rx rx data out rx data out ground v cont channel b input amp channel a channel b receive active filter transmit block diagram (without transformer, channel a shown)
3 scd4419d rev j 4/16/07 aeroflex plainview absolute maximum ratings operating case temperature -55c to +125c storage case temperat ure -65c to +150c positive power supply voltage +5.0 v to +7.0 v receiver differential input 10 v receiver input voltage (common mode) 5 v driver peak out put current 650 ma total package power dissipation over the full operating case temperature rise 2 watt (note: normal operation conditions require one transmitter on and the other off at any given time) maximum junction to case temperature 10c thermal resistance ? junction to case 5c/w electrical characteristi cs ? driver section 1 / 3 / input characteristics, tx data in or tx data in parameter condition symbol min typ max unit "0" input current v in = 0.4 v i ild - -0.2 -0.4 ma "1" input current v in = 2.7 v i ihd - 1 40 a "0" input voltage - v ild --0.7 v "1" input voltage - v ihd 2.0 - - v inhibit characteristics "0" input current v in = 0.4v i ili - -0.2 -0.4 ma "1" input current v in = 2.7v i ihi - 1.0 40 a "0" input voltage - v ili --0.7 v "1" input voltage - v ihi 2-- v delay from tx inhibit,(0 1) to inhibited output - t dxoff - 200 300 ns delay from tx inhibit, (1 0) to active output - t dxon - 100 180 ns differential output noise, inhibit mode - v noi - 2 10 mvp-p differential output impedance * 2 /-z oi 2k - - * see aeroflex application note# 113 for reference. output characteristics differential output level (direct coupled stub) pt. a - a? v o 6.6 7.1 7.6 v p-p differential output level (transformer coupled) pt. b - b? v o 18.7 20.1 21.5 v p-p rise and fall times - t r & t f 100 170 300 ns output offset 4 / pt. a - a? v os - - 90 mv peak delay from 50% point of tx data or tx data input to zero crossing of differential signal -t dtx - 120 180 ns output voltage delta, pt. a - a? 5 / - v o d 0 71 142 mvp-p output voltage delta, pt. b - b? 5 / - v o s 0 200 400 mvp-p control line input resistance -r cont -5- k
4 scd4419d rev j 4/16/07 aeroflex plainview notes: 1. v cc = 5 volts 0.1 v, t c = -55c to +125c, unless otherwise specified. 2. power on/off, measured from 75khz to 1mhz at point a-a?. see figure 5. 3. all typical values are measured at +25c. 4. at point a-a? on figure 5, 2.5 s after midpoint crossing of the parity bit of the last word of a 660 s messa ge. 5. output voltage delta ( v o ) = v o ( ideal ) - v o ( measured ), where v o ( ideal ) = slope x v cont and slope = v o v cont , see figure 3. electrical characteristics ? receiver section 1 / 3 / parameter condition symbol min typ max unit differential voltage range point a - a? v idr - 20 v peak common mode rejection ratio - cmrr 45 - - db strobe characteristics (logi c "0" inhibits output) "0" input current v s = 0.4 v i il - -0.2 -0.4 ma "1" input current v s = 2.7v i ih -1+40a "0" input voltage - v il --0.7 v "1" input voltage - v ih 2.0 - - v strobe delay (turn-on) - t sd ( on ) - 90 150 ns strobe delay (turn-off) - t sd ( off ) - 90 150 ns threshold characteristics (sinewave input ) input threshold voltage(referred to the bus) 100khz- 1mhz v th 0.60 0.8 1.15 vp-p output characteristics , rx data and rx data "1" state i oh = -0.4 ma v oh 2.5 3.5 - v "0" state i ol = 4 ma v ol -0.30.5 v delay, (average)from differential input zero crossings to rx data and rx data output 50% points -t drx - 320 400 ns power data 1 / 3 / maximum current per channel (other channel in standby) duty cycle typ max transmitter standby 50 mat 65 ma 25% duty cycle 155 ma 185 ma 50% duty cycle 290 ma 335 ma 100% duty cycle 560 ma 650 ma +v 4.75 to 5.5 volts
5 scd4419d rev j 4/16/07 aeroflex plainview power dissipation milliwatts note: vcc = 5 volts, v bus (pt. a-a') at 7.1 volts p-p 0 10 20 30 40 50 60 70 80 90 100 1600 1400 1200 1000 800 600 400 200 0 duty cycle ? percent typical maximum figure 5 ? typical transformer 1:2.5 a a? b? b tx data out tx data out rx data in rx data in 70 70 55 55 center tap 1:1.77 for stub coupling d.u.t p? p z o use technitrol 1553-45 or equivalent transformer: v cont = 0 ? 5vdc figure 4 ? transmitter (tx) output offset * output offset * last bit 2.5 sec *offset measured at point a-a? in figure 5 magnified view 0.4fs 0.8fs 0.6fs 0.2fs v o pk - pk @ a?a' fs figure 3 ? transmitter output amplitude (vo) 0 1 2 3 4 5 control voltage output amplitude 2.84 7.1 5.68 4.26 1.42 0 v cont dc slope = v o v cont connection figure 6 ? power dissipation vs. duty cycle (total hybrid with one channel transmitting and the other in standby) vs. v cont voltage output offset
6 scd4419d rev j 4/16/07 aeroflex plainview package dimensions notes 1. dimensions shown are in inches 1.200 max .900 9 equal spaces @.100 .018 .002 .175 min .065 .015 .140 max .010 .002 typ 1.200 max .310 max .300 .010 .170 min .140 max flat package dip package .310 max .030 .010 .040 or .300 min .900 9 equal spaces @.100 esd triangle identifies pin 1 esd triangle identifies pin 1 .100 .005 .100 .005 package pin out description - act4419d pin # function pin # function 1v cont a & b (0 ? 5v dc ) 11 rx data out b 2 tx/rx a 12 rx data out b 3tx/rx a 13 tx inhibit b 4 strobe a 14 tx data in b 5 ground a 15 tx data in b 6 +5vdc a & b 16 rx data out a 7 tx/rx b 17 rx data out a 8tx/rx b 18 tx inhibit a 9 strobe b 19 tx data in a 10 ground b 20 tx data in a
7 plainview, new york toll free: 800-the-1553 fax: 516-694-6715 se and mid-atlantic tel: 321-951-4164 fax: 321-951-4254 international tel: 805-778-9229 fax: 805-778-1980 west coast tel: 949-362-2260 fax: 949-362-2266 northeast tel: 603-888-3975 fax: 603-888-4585 central tel: 719-594-8017 fax: 719-594-8468 www.aeroflex.com info-ams@aeroflex.com our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused aeroflex microelectronic solutions reserves the right to change at any time without notice the specifications, design, function, or form of its products described herein. all parameters must be validated for each customer's application by engineering. no liability is assumed as a result of use of this product. no patent licenses are implied. scd4419d rev j 4/16/07 configurations and or dering information model no. dscc no. receiver data level case lead finish act4419-d * n/a normally low dip optional act4419-d-001-1 pending gold act4419-d-001-2 pending solder act4419-df * n/a flat pack optional act4419-d-001-1 pending gold act4419-d-001-2 pending solder * for 10v control voltage consult factory.
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