arinc inputs testa testb outa outb ina - inb -2.5 to +2.5 v 0 0 0 0 < -6.5 v 0 0 0 1 > +6.5 v 0 0 1 0 x0101 x1010 x1100 function table hi-8444, hi-8445, hi-8448 description features pin configurations (see page 6 for additional pin configurations) the hi-8444 and hi-8445 are quad arinc 429 line receiver ics available in a 20-pin tssop package. the hi- 8448 contains 8 independent arinc 429 line receivers. the technology is analog / digital cmos. the device is designed to operate from either a 5v or 3.3v supply. each receiver channel translates incoming arinc 429 data bus signals to a pair of ttl / cmos outputs. the optional hi-8444-10, hi-8445-10 and hi-8448-10 are designed to be used with an external 15 kohm series resistor. the ?-10? devices meet the lightning protection requirements of do-160e, level 3, waveforms 3, 4, 5a, and 5b. the testa and testb inputs bypass the analog inputs for testing purposes. they force the receiver outputs to the specified zero, one or null state. the arinc inputs are ignored when the device is in the test mode. the hi-8445 is identical to the hi-8444 except the testa and testb pins are not available. direct arinc 429 quad or octal line receivers in small footprint packages 3.3v or 5.0v single supply operation test inputs bypass analog inputs and force digital outputs to a one, zero, or null state arinc inputs are internally lightning protected per do- 160e level 3 (-10 configuration only) hi-rel processing options available hi-8444ps hi-8444ps-10 & hi-8445ps hi-8445ps-10 quad receiver in1 a in1 b in2 a in2 b testa (8444 only) testb (8444 only) in3 a in3 b in4 a in4 b out1 a out1 b out2 a out2 b vdd vss out3 a out3 b out4 a out4 b 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 20 pin plastic tssop package may 2010 (ds8444 rev. h) 05/10 quad / octal arinc 429 line receivers hi-8448ps hi-8448ps-10 octal receiver in1 ax in1 bx in1 ay in1 by in2 ax in2 bx in2 ay in2 by testa (x) testb (x) testa (y) testb (y) in3 ax in3 bx in3 ay in3 by in4 ax in4 bx in4 ay out1 ax out1 bx out1 ay out1 by out2ax out2 bx out2 ay out2 by vdd vss out3 ax out3 bx out3 ay out3 by out4 ax out4 bx out4 ay out4 by in4 by 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 38 pin plastic tssop package holt integrated circuits www.holtic.com
hi-8444, hi-8445, hi-8448 pin symbol function description 1 in1 a arinc input receiver 1 positive input 2 in1 b arinc input 3 in2 a 4 in2 b 5 testa logic input test input. (not available on hi-8445) 6 testb 7 in3 a 9 in4 a 10 in4 b 11 out4 b 12 out4 a 13 out3 b 14 out3 a 15 vss power ground 16 vdd power positive supply voltage 3.3v or 5.0 v receiver 1 negative input arinc input receiver 2 positive input arinc input receiver 2 negative input logic input test input. (not available on hi-8445) arinc input receiver 3 positive input 8 in3 b arinc input receiver 3 negative input arinc input receiver 4 positive input arinc input receiver 4 negative input logic output receiver 4 "zero" output logic output receiver 4 "one" output logic output receiver 3 "zero" output logic output receiver 3 "one" output 17 out2 b logic output receiver 2 "zero" output 18 out2 a logic output receiver 2 "one" output 19 out1 b logic output receiver 1 "zero" output 20 out1 a logic output receiver 1 "one" output pin descriptions (hi-8444, hi-8445) block diagrams in1 a in1 b in2 a in2 b in3 a in3 b in4 a in4 b testa testb out1 a out1 b out2 a out3 a out3 b out4 a out4 b out2 b in1 a in1 b in2 a in2 b in3 a in3 b in4 a in4 b out1 a out1 b out2 a out3 a out3 b out4 a out4 b out2 b hi-8444 hi-8445 in4 ax out1 ax out4 a out4 b in1 ax in1 bx in2 ax in2 bx in3 ax in3 bx in4 bx testa(x) testb(x) out1 bx out2 ax out3 ax out3 bx out4 ax out4 bx out2 bx testa(y) testb(y) in4 ay in1 ay in1 by in2 ay in2 by in3 ay in3 by in4 by out1 ay out1 by out2 ay out3 ay out3 by out4 ay out4 by out2 by hi-8448 holt integrated circuits 2
pin function receiver set description in2 bx arinc input x in2 ay arinc input y in2 by testa(x) logic input x test input testb(x) testa(y) in3 ax in3 bx in3 ay in3 by in4 ax in4 bx in4 ay y in4 by y in1 ax arinc input x receiver 1 positive input in1 bx arinc input x receiver 1 negative input in1 ay arinc input y receiver 1 positive input in1 by arinc input y receiver 1 negative input in2 ax arinc input x receiver 2 positive input receiver 2 negative input receiver 2 positive input arinc input y receiver 2 negative input logic input x test input logic input y test input testb(y) logic input y test input arinc input x receiver 3 positive input arinc input x receiver 3 negative input arinc input y receiver 3 positive input arinc input y receiver 3 negative input arinc input x receiver 4 positive input arinc input x receiver 4 negative input arinc input receiver 4 positive input arinc input receiver 4 negative input out4 by logic output y receiver 4 "zero" output out4 ay logic output y receiver 4 "one" output out4 bx logic output x receiver 4 "zero" output out4 ax logic output x receiver 4 "one" output out3 by logic output y receiver 3 "zero" output out3 ay logic output y receiver 3 "one" output out3 bx logic output x receiver 3 "zero" output out3 ax logic output x receiver 3 "one" output vss power ground supply vdd power positive supply voltage 3.3v or 5.0 v out2 by logic output y receiver 2 "zero" output out2 ay logic output y receiver 2 "one" output out2 bx logic output x receiver 2 "zero" output out2 ax logic output x receiver 2 "one" output out1 by logic output y receiver 1 "zero" output out1 ay logic output y receiver 1 "one" output out1 bx logic output x receiver 1 "zero" output out1 ax logic output x receiver 1 "one" output pin descriptions (hi-8448) hi-8444, hi-8445, hi-8448 holt integrated circuits 3
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. recommended operating conditions supply voltage ( logic input voltage range power dissipation at 25c 350 mw solder temperature 275c for 10 sec storage temperature -65c to +150c vdd) -0.3 v to +7 v -0.3 v to +5.5 v arinc input voltage -120 v to + 120 v driver peak output current +1.0 a absolute maximum ratings supply voltage operating temperature range industrial screening ......... -40c to +85c hi-temp screening ........ -55c to +125c vdd .................................. 3.0 v to 5.5 v electrical characteristics vdd = 5.0v , v = 0v, t = operating temperature range (unless or otherwise specified). ss a or 5% 3.3v 5% parameter symbol condition min typ max units arinc inputs input voltage one or zero v differential input voltage 6.5 10 13 v null v differential input voltage 2.5 v common mode v with respect to gnd 5.0 v input resistance ina to inb r supplies floating 30 75 k input to v or v r supplies floating 19 40 k input hysteresis v 0.5 1.0 v input capacitance arinc differential c 5 10 pf arinc single ended to v c 10 pf test inputs logic input voltage high v 2.0 v low v 0.8 v logic input current sink i v =2.0v 200 source i v =0.8v -1.0 outputs logic output voltage high v i =-5ma, v =5.0v 2.4 v i =-4ma, v =3.3v 2.4 v low v i =5ma, v =5.0v 0.4 v i =4ma, v =3.3v 0.4 v logic output voltage (cmos) high v i =-100 low v i =100 supply current v current i hi-8444, hi-8445 5.5 10 ma hi-8448 11 20.0 ma switching characteristics ( propagation delay in to out t c =50 pf 600 ns t 600 ns output rise time t 10% to 90% 50 80 ns output fall time t 90% to 10% 50 80 ns propagation delay test to out t 50 ns t50ns din nin com diff ss dd sup hys ad ss as ih il ih ih il il oh oh dd oh dd ol ol dd ol dd ohc oh olc ol dd dd lh l hl r f toh tol a a a v -0.2 v a v +0.2 v t = 25 c) c =50 pf dd ss a l hi-8444, hi-8445, hi-8448 holt integrated circuits 4
timing diagrams internal lightning protection (-10 only) the hi-8444-10, hi-8445-10 and hi-8488-10 are similar to the ?non -10? configurations with the exception that an external 15 kohm resistor must be added in series with each arinc input in order to properly detect the arinc 429 specified input thresholds. this option is especially useful in applications where external lightning protection circuitry is required. the hi-8444-10, hi-8445-10 and hi-8448-10 will meet the requirements of do-160e, level 3, waveforms 3, 4, 5a and 5b with the 15 kohm series resistors in place. please refer to the holt an-300 application note for additional information and recommendations on lightening protection of holt line drivers and receivers. hi-8444, hi-8445, hi-8448 1.5v 1.5v t lh t hl t lh t hl in a in b out a out b 1.5v t toh t tol 1.5v test a / test b out a / out b arinc 429 receiver timing test mode timing holt integrated circuits 5
hi-8444, hi-8445, hi-8448 holt integrated circuits 6 ordering information hi - 844xxx x - xx x package description test pins 20 pin plastic tssop (20hs) no 20 pin plastic tssop (20hs) yes part number 8445ps 8444ps 44 pin plastic quad flat pack pqfp (44ptqs) yes 8448pq temperature range flow burn in -40c to +85c no i -55c to +125c no t part number t i lead finish part number 100% matte tin (pb-free, rohs compliant) f tin / lead (sn / pb) solder blank input series resistance built-in required externally part number 25 kohm 15 kohm -10 35 kohm 0 no dash number 38 pin plastic tssop (38hs) yes 8448ps 44 pin plastic chip-scale, lpcc (44pcs) yes 8448pc 44-pin plastic quad flat pack (pqfp) 44 - in2 ax 43 - in1 by 42 - in1 ay 41 - in1 bx 40 - in1 ax 39 - n/c 38 - out1 ax 37 - out1 bx 36 - out1 ay 35 - out1 by 34 - out2 ax 33 - out2 bx 32 - out2 ay 31 - out2 by 30 - n/c 29 - vdd 28 - n/c 27 - vss 26 - n/c 25 - out3 ax 24 - out3 bx 23 - out3 ay in3 by - 12 in4 ax - 13 in4 bx - 14 in4 ay - 15 in4 by - 16 n/c-17 out4 by - 18 out4 ay - 19 out4 bx - 20 out4 ax - 21 out3 by - 22 in2 bx - 1 in2 ay - 2 in2 by - 3 n/c - 4 testa(x) - 5 testb(x) - 6 testa(y) - 7 testb(y) - 8 in3 ax - 9 in3 bx - 10 in3 ay - 11 hi-8448pq hi-8448pq-10 octal receiver additional pin configurations 44 - pin plastic 7mm x 7mm chip-scale package (qfn) 44 - in2 ax 43 - in1 by 42 - in1 ay 41 - in1 bx 40 - in1 ax 39 - n/c 38 - out1 ax 37 - out1 bx 36 - out1 ay 35 - out1 by 34 - out2 ax in2 bx - 1 in2 ay - 2 in2 by - 3 n/c - 4 testa(x) - 5 testb(x) - 6 testa(y) - 7 testb(y) - 8 in3 ax - 9 in3 bx - 10 in3 ay - 11 33 - out2 bx 32 - out2 ay 31 - out2 by 30 - n/c 29 - vdd 28 - n/c 27 - vss 26 - n/c 25 - out3 ax 24 - out3 bx 23 - out3 ay in3 by - 12 in4 ax - 13 in4 bx - 14 in4 ay - 15 in4 by - 16 n/c - 17 out4 by -18 out4 ay - 19 out4 bx -20 out4 ax - 21 out3 by -22 hi-8448pc hi-8448pc-10 octal receiver
revision history hi-8444, hi-8445, hi-8448 revision date page description of change ds8444, rev. g 05/30/08 1 changed ?10 kohm?, ?do-160c/d?, and ?and 5a? in second paragraph of the description to ?15 kohm?, do-160e?, and ?5a, and 5b? respectively. 1 changed ?do-160c/d? in fourth feature bullet to ?do160e?. 5 changed ?10 kohm? in second and third paragraphs and in the required series resistance of the ordering information to ?15 kohm?. 5 changed ?do-160d? and ?4 and 5a? in third paragraph to ?do-160e? and ?4, 5a, and 5b? respectively. 6 added revision history page as new page 6. 7 renumbered page 6 as page 7 8 replaced the 44-pin plastic quad flat pack (pqfp) drawing with new drawing. ds8444, rev. h 05/25/10 all added new package configurations for hi-8448psx and hi-8448pcx holt integrated circuits 7
hi-8444, hi-8445, hi-8448 package dimensions inches (millimeters) package type: 20hs bsc = ?basic spacing between centers? is theoretical true position dimension and has no tolerance. (jedec standard 95) 20-pin plastic tssop 0 to 8 pin 1 .0095 .0025 (.245 .055) .2555 .0035 (6.500 .100) .173 .004 (4.400 .100) .006 .002 (.145 .055) .036 .005 (.925 .125) .004 .002 (.100 .050) .018 - .029 (.450 - .750) .252 .006 (6.400 .150) detail a see detail a .026 (.650) bsc package type: 0 7 detail a see detail a sq. 44ptqs 44-pin plastic quad flat pack (pqfp) .006 (.15) .547 .010 (13.90 .25) .394 .004 (10.0 .10) sq. max. .014 .002 (.35 .05) .035 .006 (.88 .15) .005 (.13) r min. .012 (.30) r max. .055 .002 (1.4 .05) .063 (1.6) max. .0315 (.80) inches (millimeters) bsc bsc = ?basic spacing between centers? is theoretical true position dimension and has no tolerance. (jedec standard 95) holt integrated circuits 8
hi-8444, hi-8445, hi-8448 package dimensions inches (millimeters) package type: 38hs bsc = ?basic spacing between centers? is theoretical true position dimension and has no tolerance. (jedec standard 95) 38-pin plastic tssop 0 to 8 pin 1 .0085 .0025 (.22 .05) .382 .004 (9.700 .100) .173 .004 (4.400 .100) .006 .002 (.145 .055) .036 .005 (.925 .125) .004 .002 (.100 .050) .018 - .029 (.450 - .750) .252 .006 (6.400 .150) detail a see detail a .020 (.50) bsc holt integrated circuits 9 44-pin plastic chip-scale package (qfn) package type: 44pcs bsc = ?basic spacing between centers? is theoretical true position dimension and has no tolerance. (jedec standard 95) .203 .006 (5.15 .15) .016 .002 (0.40 .05) .010 (0.25) .020 (0.50) .008 (0.2) .039 (1.00) .276 (7.00) bsc .203 .006 (5.15 .15) typ typ bottom view top view bsc .276 (7.00) bsc max inches (millimeters)
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