HI-8783, hi-8784, hi-8785 arinc interface device 8 bit parallel data converted to 429 & 561 serial data out description features pin configurations the HI-8783, hi-8784, and hi-8785 are system compo- nents for interfacing 8 bit parallel data to an arinc 429 bus. the HI-8783 is a logic device only and requires a sep- arate line driver circuit, such as the hi-3182 or hi-8585. the hi-8784 and hi-8785 combine logic and line driver on one chip. the hi-8784 has an output resistance of 37.5 ohms, and the hi-8785 has an output resistance of 10 ohms to facilitate external lightning protection cicuitry. the technology is analog/digital cmos. the HI-8783 is available in a 22 pin dip format as a second source replacement for the micrel / california devices dls-111bv. the products offer high speed data bus data transactions to a buffer register. after loading 4 bytes, data is automati- cally transferred and transmitted. the data rate is equal to the clock rate. parity can be enabled in the 32nd bit. reset is used to initialize the logic upon startup. word gaps are transmitted automatically. the hi-8784 and hi-8785 require +/- 10 volt supplies in ad- dition to the 5 volt supply. automatically converts 8 bit parallel data to arinc 429 or 561 serial data high speed data bus interface on-chip line driver option soic packages available military processing options (see page 7 for additional pin configurations) vcc 561 sync d0 d1 d2 d3 d4 d5 d6 d7 561 data data zero data one parity enb xmt ready xmit clk a0 gnd reset write 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 HI-8783psi & HI-8783pst 20-pin plastic soic - wb package v+ 561 data txbout txaout v- parity enb xmt ready xmit clk slp1.5 a0 reset write vcc 561 sync d0 d1 d2 d3 d4 d5 d6 nc d7 gnd 1 2 3 4 5 6 7 8 9 10 11 24 23 22 21 20 19 18 17 16 15 14 hi-8784psi hi-8784pst hi-8785psi & hi-8785pst 12 13 24-pin plastic soic - wb package september 2006 holt integrated circuits (ds8783 rev.i) 09/06 www.holtic.com
pin pin pin symbol function description HI-8783 HI-8783 hi-8784 (20-pin) (22-pin) hi-8785 2 1 2 561 sync digital output arinc 561 sync signal 3-10 2-8,10 3-9,11 dn digital inputs parallel 8 bit data input 11 11 12 gnd power supply ground 12 12 13 a0 digital input byte address, a0=1 for 1st byte, a0=0 for 2nd, 3rd & 4th bytes - - 14 slp1.5 digital input selects the slope of the line driver. high = 1.5us 13 14 15 digital input write strobe, loads data on rising edge 14 15 16 digital input registers and sequencing logic initialized when low 15 16 17 xmit clk digital input clock input for the transmitter 16 17 18 xmt rdy digital output goes high if the buffer register is empty 17 18 19 parity enb digital input when high the 32nd bit output is odd parity - - 20 v- power supply -10 volt rail 18 19 - data one digital output goes high for each arinc bit output that is a ?one? 19 20 - data zero digital output goes high for each arinc bit output that is a ?zero? - - 21 txaout analog output line driver ouptut - a side - - 22 txbout analog output line driver outpu t - b side 20 21 23 561 data digital output serial output for arinc 561 data - - 24 v+ power supply +10 volt rail 1 22 1 vcc power supply +5 volt rail, write reset HI-8783, hi-8784, hi-8785 pin descriptions the HI-8783 is a parallel to serial converter, which when loaded with four eight bit parallel bytes, outputs the data as a 32 bit serial word. timing circuitry insert s a 4 bit gap at the end of each 32 bit word. an input buffer register allows load operations to take place while the previously loaded word is being transmitted. if the parity enb pin is high, the 32nd bit will be a parity bit, inserted so as to make the 32 bit word have odd parity. if the parity enb pin is low, the 32nd bit will be the d7 bit of the 4th byte. outputs are provided for both arinc 429/575 (data one and data zero pins) and arinc 561 (561 data and 561 sync pins) type data. a low signal applied to the pin resets the HI-8783?s internal logic so that spurious transmission does not take place during power-up. the registers are cleared so that a continuous gap will be transmitted until the first word is loaded into the transmitter. reset functional description input data can be loaded when the xmt rdy signal is high, which indicates the input buffer register is empty. the first 8 bit byte is the label byte and is loaded with the a0 input high, which initializes the internal byte counter. the remaining three bytes are loaded with a0 in the low state. each 8 bit byte is loaded into the input buffer register by a low pulse on the input. after the fourth byte is loaded, the xmt rdy output goes low. the contents of the input buffer register are transferred to the output register during the fourth bit period of the gap. if the fourth gap bit period of the previous word has already been transmitted, the contents of the input buffer register will be transferred to the output shift register during the first bit pe- riod after the loading of the fourth byte, and the xmt rdy out- put goes high. after the output shift register is loaded, the data is shifted out to the output logic in the order shown in figure 2. once a0 is set low, it must not go high until after the fourth byte is loaded. the 561 sync output pulses low when the xmt clk is low during the 8th bit of the arinc transmission. the xmit clk is the same as the data rate. write holt integrated circuits 2
HI-8783, hi-8784, hi-8785 the hi-8784 and hi-8785 have the same digital logic func- tion as the HI-8783, but include an on-chip line driver de- signed to directly drive the arinc 429 bus. the two arinc outputs (txaout and txbout) provide a differential volt- age to produce a +10 volt one, a -10 volt zero, and a 0 volt null. the slope of the arinc outputs is controlled by the slp1.5 pin. if slp1.5 is high, the output rise and fall time is nominally 1.5us. if slp1.5 is set low, the rise and fall times are 10us. data one and data zero outputs are not pro- vided for the hi-8784 and hi-8785. the hi-8784 has 37.5 ohms in series with each line driver out- put. the hi-8785 has 10.0 ohms in series. the hi-8785 is for applications where external series resistance is needed, typi- cally for lightning protection devices. functional description (cont.) a0 byte data bus arinc bits 1 byte 1 d0 - d7 arinc 1 - arinc 8 0 byte 2 d0 - d7 arinc 9 - arinc 16 0 byte 3 d0 - d7 arinc 17 - arinc 24 0 byte 4 d0 - d7 arinc 25 - arinc 32 figure 2. order of transmitted bytes figure 1. block diagram data bus 8to32bit mux 32 bit buffer register 32 bit shift register byte counter write a0 8 32 32 status & control logic xmt rdy xmit clk word gap counter bit counter output logic line driver parity enb data zero data one 561 data 561 sync txbout txaout slp1.5 hi-8784, hi8785 HI-8783 power supply sequencing the power supplies must be controlled to prevent large currents during supply turn-on and turn-off. the required sequence is v+ followed by vdd, always ensuring that v+ is the most positive supply. the v- supply is not critical and can be asserted at any time. holt integrated circuits 3
HI-8783, hi-8784, hi-8785 timing diagrams transmitter operation write set t ah asw t t hld t wpw t data bus a0 xmt rdy byte 4 valid byte 1 valid asw t xd t byte 2 valid wpd t data transmission - example pattern xmit clk 32 33 34 2 35361234 3132333435361 gap 561 data 561 sync arinc 429 data (hi-8784 & hi-8785 only) (txaout-txbout) write xmt rdy gap data one (HI-8783 only) data zero (HI-8783 only) low during clk 8 holt integrated circuits 4
parameter symbol condition min typ max units operating voltage v 4.75 5 5.25 v min. input voltage (hi) v 2.0 1.4 v max. input voltage (lo) v 1.4 0.8 v min. input current (hi) i v = 4.9v 1 a max. input current (lo) i v = 0.1v -1 a min. output voltage (hi) v i = -1.6ma 2.7 v max. output voltage (lo) v i = 1.6ma 0.4 v operating current drain i f = 100khz 0.8 2.8 ma input capacitance c not tested 20 pf cc cc ih il ih ih il il oh out ih out in vcc = 5.0v, v = 0v, t = operating temperature range (unless otherwise specified). ss a absolute maximum ratings recommended operating conditions voltages referenced to ground supply voltages v+.................................................12.5v v-.................................................-12.5v dc current per input pin................ +10ma power dissipation at 25 plastic dil............1.0w, derate 10mw/c ceramic dil..........0.5w, derate 7mw/c solder temperature ........275c for 10 sec storage temperature........-65c to +150c vcc.................................................. 7v 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 voltages v+.......................................+10v... 5% v-........................................ -10v... 5% temperature range industrial screening.........-40c to +85c hi-temp screening........-55c to +125c military screening..........-55c to +125c vcc....................................... 5v... 5% dc electrical characteristics ( HI-8783, hi-8784 and hi-8785) HI-8783, hi-8784, hi-8785 5v 0v 5v 0v phlx t phlx t plhx t plhx t data one data zero 0v 10v -10v rx t 10% 90% t t 10% 90% t rx t 10% t fx t fx differential voltage txaout - txbout line driver outputs xmt clk holt integrated circuits 5
vcc = 5.0v, v = 0v, t =operating temperature range (unless otherwise specified). ss a parameter symbol min typ max units t t t t t t setup data bus to 20 ns hold 30 ns hold a0 to 0ns pulse width 40 1 clk ns setup a0 to 20 ns delay last 80 ns data bus timing write set wpd to data bus delay between 40 ns to xmt rdy write write write write write write hld ah wpw asw xd t ac electrical characteristics (hi-8784 and hi-8785 only) ac electrical characteristics (HI-8783, hi-8784 and hi-8785) HI-8783, hi-8784, hi-8785 v+ = 10v, v- = -10v, t = operating temperature range (unless otherwise stated) a no load parameters symbol test conditions min typ max units line driver propagation delay output high to low output low to high line driver transition times output high to low output low to high t phlx plhx t t t - - 500 500 ns ns slp1.5 = logic 1 fx rx 1.0 1.0 2.0 2.0 1.5 1.5 us us slp1.5 = logic 1 - - output high to low output low to high slp1.5 = logic 0 fx rx 5 10 us us slp1.5 = logic 0 t t 10 5 15 15 vcc = 5.0v, v = 0v, v+ = 10v, v- = -10v, t = operating temperature range (unless otherwise specified). ss a minimum short circuit sink or source current i momentary magnitude 80 ma out zero ? -5.55 -5.0 -4.5 v null ? -0.25 0 0.25 v one no load, vcc = 5.0v 4.5 5.0 5.5 v line driver output levels (ref. to gnd) operating current drain (v-) i no load , f = 100khz -20 -6 ma ee operating current drain (v+) i no load , f = 100khz 6 20 ma dd operating voltage v- -9.5 -10 10.5 v operating voltage v+ 9.5 10 10.5 v parameter symbol condition min typ max units line driver output levels (differential) one no load, vcc = 5.0v 9.0 10.0 11.0 v null ? -0.5 0 0.5 v zero ? -11.0 -10.0 -9.0 v dc electrical characteristics ( hi-8784 and hi-8785 only) holt integrated circuits 6
vcc 561 data data zero data one parity enb xmt ready xmit clk nc a0 reset write 561 sync d0 d1 d2 d3 d4 d5 d6 nc d7 gnd 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 HI-8783pdi & HI-8783pdt 22 pin plastic dip package HI-8783, hi-8784, hi-8785 additional HI-8783 pin configuration (see page 1 for additional pin configurations) includes line driver legend: wb - wide body ordering information no external line driver required yes 10 ohms 27.5 ohms yes 37.5 ohms 0 package description temperature range 22 pin plastic dip (8783 only) 20 pin plastic soic - wb (8783 only) 24 pin plastic soic - wb (8784/8785 only) flow burn in -40c to +85c no i -55c to +125c no t hi - 87xx xx x x part number t i part number pd ps part number 8783 8784 8785 output series resistance built-in required externally lead finish part number 100% matte tin (pb-free, rohs compliant) f tin / lead (sn / pb) solder blank holt integrated circuits 7
0.100 typ. 0-15 o package type: 22-pin plastic dip 22p .350 .010 (8.89 .254) 1.105 .015 (28.067 .381) .135 .015 (3.429 .381) .1375 .0125 (3.4925 .3175) .019 .004 (.483 .102) .053 .013 (1.346 .330) .025 .010 (.635 .254) .400 .010 (10.160 .254) .435 .035 (11.049 .889) holt integrated circuits 8 inches (millimeters) HI-8783, hi-8784, hi-8785 package dimensions 20-pin plastic small outline (soic) - wb (wide body) .5035 .0075 (12.789 .191) .4065 .0125 (10.325 .318) .296 .003 (7.518 .076) 0 to 8 .090 .010 (2.286 .254) .0075 .0035 (.191 .089) .050 (1.27) typ .018 (.457) typ see detail a detail a .033 .017 (.838 .432) package type: 20hw .0105 .0015 (.2667 .0381)
holt integrated circuits 9 inches (millimeters) .4065 .0125 (10.325 .318) .2955 .0035 (7.506 .089) .050 (1.27) 0 to 8 .0075 .0035 (.191 .089) typ .018 (.457) typ see detail a detail a package type: 24-pin plastic small outline (soic) - wb (wide body) 24hw .606 .004 (15.392 .102) .050 (1.27) .033 .017 (.838 .432) .095 .005 (2.413 .127) typ .018 (.457) typ see detail a detail a package type: 24-pin plastic small outline (soic) - wb (wide body) 24hw .0105 .0015 (.2667 .0381) HI-8783, hi-8784, hi-8785 package dimensions
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