hi-1573, hi-1574 mil-std-1553 3.3v monolithic dual transceivers description features pin configurations the hi-1573 and hi-1574 are low power cmos dual transceivers designed to meet the requirements of the mil-std-1553 specification. the transmitter section of each channel takes complementary cmos / ttl digital input data and converts it to bi-phase manchester encoded 1553 signals suitable for driving the bus isolation transformer. separate transmitter inhibit control signals are provided for each transmitter. the receiver section of the each channel converts the 1553 bus bi-phase data to complementary cmos / ttl data suitable for inputting to a manchester decoder. each receiver has a separate enable input which can be used to force the output of the receiver to a logic "0" (hi-1573) or logic 1 (hi-1574). to minimize the package size for this function, the transmitter outputs are internally connected to the receiver inputs, so that only two pins are required for connection to each coupling transformer. for designs requiring independent access to transmitter and receiver 1553 signals, please contact your holt sales representative. vdda 1 busa 2 3 rxena 4 gnda 5 vddb 6 busb 7 8 rxenb 9 gndb 10 busa busb compliant to mil-std-1553a & b, arinc 708a 3.3v single supply operation smallest footprint available in 20 pin plastic esoic (thermally enhanced soic) package less than 0.5w maximum power dissipation 7 mm x 7 mm 44-pin plastic chip-scale package available in dip and small outline (esoic) package options military processing options industry standard pin configurations 20 pin ceramic dip package 20 19 txa 18 txinha 17 rxa 16 15 14 txb 13 txinhb 12 rxb 11 txa rxa txb rxb 20 pin plastic esoic - wb package january 2007 (ds1573 rev.i) 01/07 1573cdi 1573cdt 1573cdm 1574cdi 1574cdt 1574cdm 1573psi 1573pst 1573psm 1574psi 1574pst 1574psm 1 busa 2 3 rxena 4 gnda 5 vddb 6 busb 7 8 rxenb 9 gndb 10 vdda busa busb 20 19 txa 18 txinha 17 rxa 16 15 14 txb 13 txinhb 12 rxb 11 txa rxa txb rxb pin configurations 44 - 43 42 41 busa 40 busa 39 vdda 38 vdda 37 36 txa 35 - 34 - busa busa txa -1 rxena 2 gnda 3 gnda 4 gnda 5 vddb 6 vddb 7 busb 8 busb 9 10 11 busb busb 33 - 32 - 31 txinha 30 rxa 29 28 - 27 - 26 25 txb 24 txinhb 23 - rxa txb -12 -13 -14 -15 rxenb 16 gndb 17 gndb 18 gndb 19 20 rxb 21 -22 rxb 1573pci 1573pct 1574pci 1574pct 44 pin plastic 7mm x 7mm chip-scale package holt integrated circuits www.holtic.com
pin symbol function description (dip & soic) 1 vdda power supply +3.3 volt power for transceiver a 2 busa analog output mil-std-1533 bus driver a, positive signal 3 analog output mil-std-1553 bus driver a, negative signal 4 rxena digital input receiver a enable. if low, forces rxa and low (hi-1573) or high (hi-1574) 5 gnda power supply ground for transceiver a 6 vddb 7 busb 9 rxenb 10 gndb 11 12 rxb digital output receiver b output, non-inverted 13 txinhb digital input transmit inhibit, bus b. if high busb, disabled 14 txb digital input transmitter b digital data input, non-inverted 15 digital input transmitter b digital data input, inverted 16 digital output busa rxa busb txb rxa power supply +3.3 volt power for transceiver b analog output mil-std-1533 bus driver b, positive signal 8 analog output mil-std-1553 bus driver b, negative signal digital input receiver b enable. if low, forces rxb and low (hi-1573) or high (hi-1574) power supply ground for transceiver b digital output receiver b output, inverted receiver a output, inverted 17 rxa digital output receiver a output, non-inverted 18 txinha digital input transmit inhibit, bus a. if high busa, disabled 19 txa digital input transmitter a digital data input, non-inverted 20 digital input transmitter a digital data input, inverted busb rxb rxb busa txa pin descriptions functional description the hi-1573 family of data bus transceivers contains dif- ferential voltage source drivers and differential receivers. they are intended for applications using a mil-std-1553 a/b data bus. the device produces a trapezoidal output waveform during transmission. data input to the device?s transmitter section is from the complementary cmos inputs txa/b and / . the transmitter accepts manchester ii bi-phase data and con- verts it to differential voltages on . the transceiver outputs are either direct or transformer coupled to the mil-std-1553 data bus. both coupling methods produce a nominal voltage on the bus of 7.5 volts peak to peak. transmitter txa b busa/b and / the transmitter is automatically inhibited and placed in the high impedance state when both txa/b and / are ei- ther at a logic ?1? or logic ?0? simultaneously. a logic ?1? ap- plied to the txinha/b input will force the transmitter to the high impedance state, regardless of the state of txa/b and / busa b txa b txa b. receiver the receiver accepts bi-phase differential data from the mil-std-1553 bus through the same direct or transformer coupled interface as the transmitter. the receiver?s differ- ential input stage drives a filter and threshold comparator that produces cmos data at the rxa/b and / output pins. rxa b each set of receiver outputs can be independently forced to a logic "0" (hi-1573) or logic ?1? (hi-1574) by setting rxena or rxenb low. a direct coupled interface (see figure 2) uses a 1:2.5 ratio isolation transformer and two 55 ohm isolation resistors between the transformer and the bus. in a transformer coupled interface (see figure 3), the transceiver is connected to a 1:1.79 isolation transformer which in turn is connected to a 1:1.4 coupling transformer. the transformer coupled method also requires two coupling resistors equal to 75% of the bus characteristic impedence (zo) between the coupling transformer and the bus. mil-std-1553 bus interface hi-1573, hi-1574 holt integrated circuits 2
transmit waveform - example pattern txa/b txa/b busa/b - busa/b receive waveforms - example pattern rxa/b rxa/b vin (line to line) figure 1. block diagram txa/b txa/b txinha/b rxa/b rxa/b rxena/b each channel transmit logic receive logic slope control comparator input filter busa/b busa/b transmitter receiver data bus isolation transformer coupler network direct or transformer t dr t dr t rg t dr t rg t dr holt integrated circuits 3 hi-1573, hi-1574
note: stresses above absolute maximum ratings or outside recommended operating conditions may cause permanent damage to the device. these are stress ratings only. operation at the limits is not recommended. supply voltage ( logic input voltage range power dissipation at 25c 1.0 w ceramic dil, derate 7mw/c solder temperature 275c for 10 sec. junction temperature 175c storage temperature -65c to +150c vdd) -0.3 v to +5 v -0.3 v dc to +3.6 v receiver differential voltage 10 vp-p driver peak output current +1.0 a absolute maximum ratings recommended operating conditions supply voltage temperature range industrial screening.........-40c to +85c hi-temp screening........-55c to +125c military screening..........-55c to +125c vdd....................................... 3.3v... 5% dc electrical characteristics vdd = 3.3 v, gnd = 0v, t = operating temperature range (unless otherwise specified). a parameter symbol condition min typ max units operating voltage vdd 3.15 3.30 3.45 v total supply current icc1 not transmitting 4 10 ma icc2 transmit one channel @ 225 250 ma 50% duty cycle icc3 transmit one channel @ 0ma 100% duty cycle power dissipation pd1 not transmitting 0.06 w pd2 transmit one channel @ 0.3 0.5 w 100% duty cycle min. input voltage (hi) v digital inputs 70% v max. input voltage (lo) v digital inputs 30% v min. input current (hi) i digital inputs 20 a max. input current (lo) i digital inputs -20 a min. output voltage (hi) v i = -1.0ma, digital outputs 90% v max. output voltage (lo) v i = 1.0ma, digital outputs 10% v input resistance r differential 20 kohm input capacitance c differential 5 pf common mode rejection ratio cmrr 40 db input level v differential 9 vp-p input common mode voltage v -5.0 5.0 v-pk threshold voltage - direct-coupled detect 1.15 20.0 no detect 0.28 theshold voltage - detect 0.86 14.0 no detect 0.20 425 50 v 1 mhz sine wave vp-p v (measured at point ?a ? in figure 2) vp-p transformer-coupled v 1 mhz sine wave vp-p v (measured at point ?a ? in figure 3) vp-p = ih il ih il oh out ih out d dd dd dd dd receiver (measured at point ?a ? in figure 2 unless otherwise specified) in in in icm thd thnd thd thnd d t holt integrated circuits 4 hi-1573, hi-1574
dc electrical characteristics (cont.) vdd = 3.3 v, gnd = 0v, t = operating temperature range (unless otherwise specified). a parameter symbol test conditions min typ max units receiver enable delay tren from rxena/b rising or falling edge to 40 ns rxa/b or driver delay tdt txa/b, txa/b to busa/b, busa/b 150 ns rise time tr 35 ohm load 100 300 ns fall time tf 35 ohm load 100 300 ns inhibit delay tdi-h inhibited output 100 ns tdi-l active output 150 ns note 1. measured usin g a 1 mhz sinusoid, 20 v peak to peak, line to line at point ?at? (guaranteed but not tested). note 2. measured usin g a 1 mhz sinusoid, 860 mv peak to peak, line to line at point ?at? (100% tested). note 3. measured usin g a 1 mhz sinusoid, 860 mv peak to peak, line to line at point ?at?. measured from input zero crossing point. receiver transmitter (measured at point ?a ? in figure 3) (measured at point ?a ? in figure 2) t d receiver delay tdr from input zero crossing to rxa/b or 500 ns note 3 receiver gap time trg spacing between rxa/b and rxa/b pulses 60 430 ns note 1 note 2 rxa/b rxa/b ac electrical characteristics vdd = 3.3 v, gnd = 0v, t =operating temperature range (unless otherwise specified). a txa/b txa/b txinha/b transmitter receiver 1:2.5 point ?a ? d 55 55 35 2.5:1 55 55 35 rxena/b busa/b busa/b rxa/b rxa/b figure 2. direct coupled test circuits isolation transformer isolation transformer point ?a ? d parameter symbol condition min typ max units output voltage direct coupled 35 ohm load .6.0 9.0 vp-p (measured at point ?a ? in figure 2) 70 .18.0 27.0 vp-p output noise v differential, inhibited 10.0 mvp-p output dynamic offset voltage v -90 90 mv -250 250 mv output resistance r differential, not transmitting 10 kohm output capacitance c 1 mhz sine wave 15 pf transmitter (measured at point ?a ? in figure 2 unless otherwise specified) d d v transformer coupled v ohm load (measured at point ?a ? in figure 3) direct coupled 35 ohm load (measured at point ?a ? in figure 2) transformer coupled v 70 ohm load (measured at point ?a ? in figure 3) out out dyn t d t on dyn out out holt integrated circuits 5 hi-1573, hi-1574
txa/b txa/b txinha/b transmitter busa/b busa/b 52.5 (.75 zo) 52.5 (.75 zo) 1.79:1 1:1.79 1:1.4 1.4:1 35 (.5 zo) figure 3. transformer coupled test circuits thermal characteristics coupling transformer coupling transformer isolation transformer isolation transformer receiver 52.5 (.75 zo) 52.5 (.75 zo) 35 (.5 zo) rxa/b rxa/b rxena/b point ?a ? t point ?a ? t heat sink - esoic & chip-scale package both the hi-1573psi/t/m and hi-1574psi/t/m use a 20- pin thermally enhanced soic package. the hi- 1573pci/t and hi-1574pci/t use a plastic chip-scale package. these packages include a metal heat sink located on the bottom surface of the device. this heat sink should be soldered down to the printed circuit board for optimum thermal dissipation. the heat sink is electrically isolated and may be soldered to any convenient power or ground plane.. t a =25c t a =85c t a =125c hi-1573cdi / t / m hi-1574cdi / t / m hi-1573pci / t hi-1574pci / t data taken at vdd=3.3v, continuous transmission at 1mbit/s, single transmitter enabled. 20-pin ceramic side-brazed dip socketed 62c/w 56c 116c 156c 47c/w 44-pin plastic chip- scale package heat sink unsoldered 49c/w 50c 110c 150c 20-pin thermally enhanced plastic soic (esoic) junction temperature 152c hi-1573psi / t / m hi-1574psi / t / m heat sink unsoldered heat sink soldered 149c 109c 49c part number package style condition ? ja 54c/w 52c 112c holt integrated circuits 6 applications note holt applications note an-500 provides circuit design notes regarding the use of holt's family of mil-std-1553 transceivers. layout considerations, as well as recommended interface and protection components are included. hi-1573, hi-1574
ordering information hi - (plastic) 157x xx x x package description 20 pin plastic esoic (wide body, thermally enhanced soic w/heat sink) 44 pin plastic chip-scale (lpcc) part number ps pc lead finish part number 100% matte tin (pb-free, rohs compliant) f blank hi - (ceramic) 157xcd x temperature range flow burn in -40c to +85c no i -55c to +125c no t part number t i rxenb = 0 part number 1574 1573 -55c to +125c yes m m rxa rxa rxb 0 1 0 1 0 1 0 1 rxb rxena = 0 20 pin ceramic side brazed dip rxenb = 0 part number 1574cd 1573cd rxa rxa rxb 0 1 0 1 0 1 0 1 rxb 20 pin ceramic side brazed dip package description rxena = 0 tin / lead (sn / pb) solder tin / lead (sn / pb) solder lead finish gold (pb-free, rohs compliant) gold (pb-free, rohs compliant) temperature range flow burn in -40c to +85c no i -55c to +125c no t part number t i -55c to +125c yes m m recommended transformers the hi-1573 and hi-1574 transceivers have been characterized for compliance with the electrical require- ments of mil-std-1553 when used with the following manufacturer part number application turns ratio(s) dimensions technotrol tl1553-45 isolation dual tapped 1:1.79, 1:2.5 .630 x 630 x .155 inches premier magnetics pm-db2725ex isolation dual tapped 1:1.79, 1:2.5 .500 x .500 x .375 inches technotrol tq1553-2 stub coupling 1:1.4 .625 x .625 x .250 inches premier magnetics pm-db2702 stub coupling 1:1.4 .625 x .500 x .250 inches transformers. holt recommends the premier magnetics parts as offering the best combination of electrical performance, low cost and small footprint. hi-1573, hi-1574 holt integrated circuits 7
.5035 .0075 (12.789 .191) .296 .003 (7.518 .076) .050 (1.27) 0 to 8 .090 .010 (2.286 .254) typ .018 (.457) typ. see detail a detail a package type: 20-pin plastic small outline (esoic) - wb (wide body, thermally enhanced) 24hew .215 (5.461) typ. .300 (7.620) typ. heat sink stud on bottom of package. bottom view top view .4065 .0125 (10.325 .318) .033 .017 (.838 .432) .0075 .0035 (.191 .889) .0105 .0015 (.2667 .0381) package dimensions inches (millimeters) holt integrated circuits 8 p ackage t ype : .017 .002 (.432 .051) .100 .005 (2.540 .127) .310 .010 (7.874 .254) .125 min. (3.175 min.) .050 typ. (1.270 typ.) .200 max. (5.080 max.) 1.000 .010 (25.400 .254) .010 + .002/- .001 (.254 + .051/- .025) .300 .010 (7.620 .254) .085 .009 (2.159 .229) 20-pin ceramic side-brazed dip 20c .025 (.635) min.. .025 (.635) min..
package dimensions millimeters holt integrated circuits 9 heat sink stud on bottom of package. 7.00 .10 7.00 .10 5.65 .15 5.65 .15 0.40 .05 0.25 typ 0.50 0.2 typ 0.90 .10 44-pin plastic chip-scale package
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