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| amis-42770 dual high-speed can transceiver data sheet for long networks 1.0 general description contro ller ar e a net w ork ( c a n ) is a seri al c o mmunic a tio n protoc o l , w h ic h supp orts distri buted r eal-tim e control a nd m u ltipl e xi ng w i t h hi gh safet y lev e l. t y pica l appl icatio ns of can-bas ed n e t w o r ks can b e found in auto m otive an d in d u strial e n viro n m ents. t he amis-42770 d ual- c an tr ansce iver is th e interfac e b e tw e e n up t o t w o ph ysic al b u s li nes a nd th e pr otocol c ontrol l e r and w i l l be used for seri al data interc ha n ge bet w e e n dif f erent electro n i c units at more than on e bus l i ne. it can be used for bot h 1 2 v and 24 v s y stems. t he circuit consists of follo w i ng blocks: ? t w o d i fferenti a l line transm i tters ? t w o d i fferenti a l line rec e ivers ? interface to the can protoco l han dler ? interface to expan d the num b e r of can buss e s ? log ic block i n cl udi ng rep eater function a nd th e feedb ack sup p ressi on ? t hermal shutdo w n circ uit (t s d ) due to the w i de commo n-m ode vo ltag e ra nge of the rec e iver i nputs, the amis-427 7 0 is abl e to reach o u tstand i ng lev e ls of electrom agn eti c suscepti b il it y (ems). sim ilarl y , e x tremel y lo w e l ectrom agn etic emis s i on (eme) is achi eved b y the e x c e ll ent matchin g of the output si gna l s . 2.0 key features ? f u ll y c o mp atibl e w i t h the iso 118 98-2 sta n d a rd ? certifie d ?auth enticati on o n c a n t r ansceive r conforma nce (d1.1)? ? w i de ran ge of bus commu nic a tion sp ee d (u p to 1mbit/s in functio n of the bus topo lo g y ) ? allo w s l o w tran smit data rate i n net w o rks e x c eed ing 1km ? ideal l y s u ite d for 12v an d 24 v i ndustri a l an d automotiv e a pplic atio ns ? lo w eme: com m on-mo de-ch o k e is no lo ng er requ ired ? differenti a l rec e iver w i t h w i d e common-mo d e rang e (+ /- 35v) for high em s ? no distur banc e of the bus lin e s w i th an un- po w e re d nod e ? prolo nge d dom ina n t time-out functio n all o w i ng communication spe eds do w n to 1kbit/s ? t hermal protec tion ? bus pins pr ote c ted aga inst transi ents ? short circuit pr oof to supp l y v o ltag e an d gro und 3.0 techni cal cha r a c t e ri stics table 1: technic a l characteristics sy mbo l parameter con d iti ons min. max. unit v ca nhx dc voltage at pin canh1/2 0 < v cc < 5.25v; no time limit -45 +45 v v ca nl x dc voltage at pin canl1/2 0 < v cc < 5.25v; no time limit -45 +45 v v i ( di f ) ( bus_ d o m ) differential bus output voltage in d o minant state 42.5 ? < r lt < 60 ? 1 . 5 3 v cm-ran ge input common-m ode range for co mparato r guar anteed diffe rential receiver th reshold and leakage current -35 +35 v v c m - peak common-mo de peak see figure 1 0 an d figure 11 (1 ) - 1 0 0 0 1 0 0 0 m v v cm-st e p common-mo de step see figure 1 0 an d figure 11 (1 ) -250 250 mv not e : (1) the parame t er s v c m -peak and v cm -s te p guar antee low em e. a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 1 www.amis.com speci f i c atio ns subj ect to chang e w i tho u t n o ti ce
amis-42770 dual high-speed can transceiver data sheet for long networks 4.0 ordering information orderi ng c ode ( tube s) orderi ng c ode ( t ape ) marketin g na m e package tem p . ra nge 0icaw-001-x t d 0icaw-001-x t p amis-42770 gh a soic- 20 300 gr een -40c ? 125 c 5.0 blo c k diag ra m f i gure 1: b l ock diagram amis-42770 gnd rx 0 2 x t i me r cl o c k lo gic uni t por 37 9 2 5 6 15 16 17 12 fe edb ec k s u r p re ssi o n fe edb ec k s u r p re ssi o n ri nt tx 0 tex t vcc 4 v cc canh1 canl1 v ref 8 dr iv er con t ro l th er ma l s h ut do w n com p v cc / 2 + r i( cm) r i( cm) v cc 10 pc 2 0071 011 .1 13 14 enb1 - ti m e r v cc canh 2 canl 2 dr ive r co nt rol com p v cc / 2 + r i( c m ) r i( c m ) v cc 19 18 enb2 - ti m e r a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 2 www.amis.com speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 6.0 typical application 6 . 1 a p plic a t ion de s c ription amis-4277 0 is espec ial l y des i gne d to prov id e the li nk b e t w een a ca n c o ntroll er (protoc o l ic) an d t w o ph ysic al b u sse s. it is abl e to oper ate in thre e different mo d e s: ? dual c a n ? a can-bus e x t end er ? a can-bus re p eater 6 . 2 a p plic a t ion s c he ma tics f i gure 2: a pplication diagram ca n- bus r e peater f i gure 3: a pplication diagram dual - c a n amis-42770 en1 en2 te xt rx0 tx0 7 9 2 3 10 rin t 4 vbat canh 2 canl 1 gn d vcc vref vcc 18 13 12 19 14 8 gnd can co n- tro ller pc 20071011 .5 5v-reg 5 6 1 5 16 17 can l 2 can h 1 c d c d r lt 60 ? can b u s 2 can bus 1 r lt 60 ? 100 nf 100 nf c amis-42770 en1 en2 te xt rx 0 tx0 7 9 2 3 10 rin t 4 can h 2 can l 1 gn d vref vcc 18 13 12 19 14 8 p c 20071011. 3 5 6 15 16 17 canl 2 canh 1 c d r lt 60 ? can bus 2 can bus 1 r lt 60 ? 10 0 nf vbat 5v-reg a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 3 www.amis.com speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 4 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce f i gure 4: a pplication diagram ca n- bus e x tender a m is -4 2770 en 1 en 2 te x t rx 0 tx0 7 9 2 3 10 ri nt 4 vbat ca nh 2 ca nl 1 gnd vc c vref vc c 18 13 12 19 14 8 gn d can co n- troll e r 5v -reg 5 6 15 1 6 17 ca nl 2 ca nh1 c d c d r lt 60 ? ca n b u s 2 ca n b u s 1 r lt 60 ? 100 nf 100 nf c p c 20 07 10 11 . 7 a m is -4277 0 en 1 en2 text rx 0 tx0 7 9 2 3 10 rint 4 ca nh2 ca nl1 gn d vref vc c 18 13 12 19 14 8 5 6 15 16 17 ca nl 2 ca nh 1 c d r lt 60 ? ca n b u s 4 ca n b u s 3 r lt 60 ? 100 nf isolated +5 du al opt o c oupl er a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 amis-42770 dual high-speed can transceiver data sheet for long networks 6.3 pin descrip tio n 6.3.1 pin out (top view ) f i gure 5: p i n configuratio n tx 0 gnd gnd 14 15 16 17 18 19 20 1 2 3 4 5 6 7 nc rx 0 vr e f 1 ri n t en 1 nc gnd ca nl 1 ca nh 1 vcc 8 9 10 13 12 11 ami s -42770 pc 20 071 011 . 2 nc gnd gnd ca nl 2 ca nh 2 te x t en 2 6.3.2 pin descri p tio n tabl e 2: pi n out pin name descrip tion 1 n c n o t c o n n e c t e d 2 enb2 enabl e i nput, bu s sy stem 2; i n te r nal pul l - up 3 text mul t i - sy stem t r an smi tter input; i n te rnal pul l - up 4 tx0 transmi tter i nput ; i n ternal pul l - up 5 g n d grou nd connecti o n (1 ) 6 gnd grou nd connecti on (1 ) 7 r x 0 recei v e r o u t p u t 8 v ref1 reference vol t ag e 9 r i n t mul t i - sy stem recei v e r o u t p u t 10 enb1 enabl e i nput, bu s sy stem 1; i n te r nal pul l - up 1 1 n c not c o n n e c t e d 12 vcc posi ti ve suppl y vol t age 13 canh1 canh tra n s c e i v e r i/o b u s s y s t em 1 14 canl1 canl transceiver i/o b u s s y stem 1 1 5 g n d grou nd connecti o n (1 ) 16 gnd grou nd connecti on (1 ) 1 7 g n d grou nd connecti o n (1 ) 18 canl2 canl transceiver i/o b u s s y stem 2 19 canh2 canh tra n s c e i v e r i/o b u s s y s t em 2 20 nc not connected not e s: (1) in order to en sur e th e chip per forma n ce, all these pin s need to b e conne cted to gnd on the p c b. a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 5 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 7.0 functional description 7.1 o v erall functi onal description ami s -4277 0 is speci a l l y d e si gne d t o prov id e t h e li nk b e t w een t he prot oc ol i c ( c an c o nt roll er) a nd t w o p h y sica l b u s lin es. d a t a int e rch ang e be t w e en t hos e t w o bus li nes is r ealiz ed vi a t h e logic u n it insi d e t he chip. t o provi de an i n d epe nd ent s w it c h -of f of t he t r ansceiv er uni t s f o r bot h bus s y st ems b y a t h ird dev ice (e. g . t he c), en abl e-in put s f o r t he correspo n d in g drivi ng an d receivi ng sect ions ar e pr ovid ed. as lon g as bot h li nes are en abl ed, t h e y app ear as o ne lo gica l bus t o all n o d e s con nect ed t o e i t h e r of t h e m . t h e b u s l i n e s ca n ha ve t w o lo g i ca l sta t e s , do mi na n t o r re ce ssi ve . a b u s is i n the re ce ssi v e sta t e w hen th e d r i v i n g secti o n s o f all t r ansceiv ers co nnect e d t o t he bus are passiv e . t he dif f e rent ial v o lt a ge bet w e e n t h e t w o w i res is a ppr o x imat el y z e ro. i f at le as t one driver is act i v e , t he bus c h a n g e s int o t h e d o m ina n t st at e. t h is st at e is r e p r esent e d b y a dif f e rent i a l v o lt age gre a t e r t h a n a m inim um t h resho l d and t heref or e b y a c u rrent f l o w t h ro ugh t h e t e rmi n at ing r e sist ors of t he b u s li ne. t he recessive st at e is ov er w r it t e n by the domi nant st at e . i n case a f a ult (like short c i r c uit ) is prese n t on o n e of t h e b u s li nes, it remains lim it e d t o t h at bus l i ne w h e r e it o ccurs. d at a int e rch ang e f r o m t he prot ocol i c t o t he ot her bus s y st em an d on t h is b u s syst em it self ca n be cont i n u e d . ami s -4277 0 c an be als o use d f o r on l y o n e bus s y st em. i f t he c o n nect i o n s f o r t h e sec o n d bus s y st em ar e sim p l y lef t o p en it serv e s as a sing le t r ansce iver f o r an el ect r on ic unit . f o r corre ct operat io n, it is necessar y t o t e rminat e t h e ope n bus b y t he pr op er t e rminat i on res i st or. 7.2 logic unit and c a n controller interface t he logic un it i n sid e ami s -42 770 prov id es d a t a t r ansf e r f r o m / t o t he d i git a l int e rf ace t o / f r om t he t w o b u ss es a nd f r om on e b u s t o t h e ot her bus. t he det ai led f u nct i o n of t he log i c u n it is descri bed in t able 3. all di git a l i n p u t pins, incl udi ng enbx, hav e a n int e rn al p u ll- up resist or t o e n sure a rec e ss ive st at e w h e n t he inp u t is not con nect e d or is accid ent a l l y i n t e rrupt ed. a domi n a n t st at e o n t he bus lin e is r epr es ent ed b y a l o w - level at t h e di git a l int e rf ac e; a rece ss ive st at e is repres ent ed b y a hig h -lev el. domin ant st at e receiv ed on a n y b u s (if ena b l ed) c aus es a domi nant st at e on bot h b u sse s, pin ri nt an d pi n r x 0. d o m i na nt sig nal on an y of t he i nput pi ns t x 0 and t e xt caus es t r ansmissi o n of domin ant on bot h bus li n e s (if enab le d). digit a l i nput s t x 0 an d t e xt ar e use d f o r co n nect i n g t he int e rna l lo gic?s of severa l i c ?s t o obt a i n v e rsio ns w i t h m o re t han t w o bu s out put s (se e f i gure 4: app l icat io n di agra m can-bus e x t e nder). t h e y have also a direct l ogic a l l i n k t o pi ns r x 0 an d ri nt ind epe nd ent l y on t he en 1 x p i ns ? d o min ant on t x 0 is dir e ct l y t r ansf e rr ed t o bot h r x 0 a nd ri nt pins, d o min ant on t e xt is o n l y t r ansf e rred t o rx0. 7.3 t r an smitter s t he t r ansceive r inclu des t w o t r ansmit t e rs, on e f o r each b u s line, a nd a driv er cont rol circ u i t . each t r ansmit t e r is impleme n t e d as a push a nd a pu ll driv er. t he drivers w i l l be a c t i ve if t he t r ansmi ssio n of a domin ant bit i s requir ed. du ring t he t r a n s m ission o f a recessiv e bit all drivers ar e passive. t he t r ansmit t e rs hav e a bu ilt -i n cur r ent limit in g cir c uit t hat prot e c t s t he driver st age s from dama ge ca use d b y accid ent a l short circuit t o eit her pos it ive suppl y vo lt ag e or t o ground. addit i ona ll y a t hermal prot ect i on cir cu it is int egr at ed. t he driver co n t rol circuit ens ures t hat t h e d r ivers ar e s w it ched on an d o f f w i t h a co nt ro lled slo pe t o li mit eme. t he driver c o nt rol circuit w i l l be c ont rol l ed it se lf b y t h e t hermal prot ect i o n circu i t , t he t i mer circuit and t h e log i c unit . t he enabl e sig nal enb x all o w s t h e t r ansmi t t e r t o be s w it c hed of f b y a t h ird dev ice (e. g . t he c). i n t h e disa bl ed st at e (enb x = hig h ) t he corre spon din g t r ans mit t e r behav es as in t he reces s ive st at e. a m i se m i co nd uc t o r ? o c tober 2 007, rev. 1.0 6 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks tabl e 3: fu ncti on of the logi c un i t; bol d l e tters descri be i nput si gn al s en1b en2b tx0 text b u s 1 st at e b u s 2 st at e rx0 rin t 0 0 0 0 domi n a n t d o m i n a n t 0 0 0 0 0 1 domi n a n t domi n a n t 0 0 0 0 1 0 domi n a n t d o m i n a n t 0 1 0 0 1 1 recessive recessive 1 1 0 0 1 1 do mi na nt (1 ) domi n a n t 0 0 0 0 1 1 domi n a n t do mi na nt (1 ) 0 0 0 1 0 0 d o m i n a n t r e c e s s i v e 0 0 0 1 0 1 domi n a n t recessive 0 0 0 1 1 0 d o m i n a n t r e c e s s i v e 0 1 0 1 1 1 recessive recessive 1 1 0 1 1 1 do mi na nt (1 ) r e c e s s i v e 0 0 0 1 1 1 recessive do mi na nt (1 ) 1 1 1 0 0 0 r e c e s s i v e d o m i n a n t 0 0 1 0 0 1 recessive domi n a n t 0 0 1 0 1 0 r e c e s s i v e d o m i n a n t 0 1 1 0 1 1 recessive recessive 1 1 1 0 1 1 do mi na nt (1 ) r e c e s s i v e 1 1 1 0 1 1 recessive do mi na nt (1 ) 0 0 1 1 0 0 r e c e s s i v e r e c e s s i v e 0 0 1 1 0 1 recessive recessive 0 0 1 1 1 0 r e c e s s i v e r e c e s s i v e 0 1 1 1 1 1 recessive recessive 1 1 1 1 1 1 do mi na nt (1 ) r e c e s s i v e 1 1 1 1 1 1 recessive do mi na nt (1 ) 1 1 n o te: (1) dominant d e te cted by the corre spondi ng re ceiv er. 7.4 rec e i v er s t w o b u s recei v ing sect i ons sense t he st at es of t he bus lines. eac h receiver sect io n consist s of an input f ilt er an d a f a st and accurat e com p arat or. t he ai m of t he input f ilt er is t o improv e t he imm unit y ag ainst h i gh-f r e que nc y dist urb ances a nd als o t o convert t he vo lt age at t he b u s lines canh x a nd can l x, w h i c h can va r y f r o m ?12v t o + 1 2 v , t o volt ages i n t he ran ge 0 t o 5v, w h ich can be a p p lie d t o t he compar a t ors. t he out put signal of t he com parat ors is g a t ed b y t h e enb x sig nal. i n t h e disabl ed st at e (enbx = high ), t he out put signa l of t h e compar at or w i l l be rep l ace d b y a p e rma nent l y rec e ssive st a t e and d oes n o t dep end on t he bus v o lt a g e . i n t he enab le d st at e t h e receiv er sign al sent t o t he log i c unit is ide n t i c a l t o t he comp arat or out p u t si gna l. 7 . 5 time -out co u n te r t o avoid t hat t he t r ansc e iver drives a perm a nent d o min ant st at e on e i t her of t he bus lin e s (blocki ng all communic a t i o n ) , t i me-o ut f unct i on is imp l eme n t ed. si g nals on pi ns t x 0 a nd t e xt a s w e l l as b o t h bus r e ce ivers are c o n nect e d t o t h e l ogic unit t h r oug h ind epe nd ent t i mers. i f t he inp u t of t h e t i mer st a y s dom ina n t f o r l o n ger t h an 25ms (see p a r a met e r t dom ), it is re plac ed b y a rec e ssiv e sign al on t h e t i mer out put . 7.6 feedback suppression t he logic un it descri bed in t abl e 3 co nst a n t l y e n sures t h a t domina n t s y mbols o n on e bus li ne ar e t r a n smit t ed t o t h e ot her bus l i ne w i t h o u t imp o si ng an y prior i t y on eit her of t h e li nes. t h is f e at ure w o u l d le ad t o an ?int er l o ck? st at e w i t h perma ne nt do mina nt s ig nal t r ansmit t ed t o bot h bus l i n e s, if no e x t r a mea s ure is t a ken. t heref ore a f e edb ack su ppr e ssion is incl ud ed insi de t he l ogic un it of t h e t r ansce iver. t h is block mask s-out rec ept io n on t hat b us line, o n w h ic h a domi nant is act i vel y t r ansm i t t ed. t he rece pt ion b e comes act i ve aga in o n l y w i t h cert ai n dela y af t e r t he domi nan t t r ansmissio n o n t h is lin e is f i ni shed. a m i se m i co nd uc t o r ? o c tober 2 007, rev. 1.0 7 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 7.7 po w e r-on -reset (por) w h ile vcc volt age is b e l o w t h e por level, t h e por circuit makes sure t h at : ? t he count ers a r e kept in t he r e set mode a n d st able st at e w i t hout current c onsum pt ion ? i nput s are dis a ble d (don' t car e ) ? out put s are hi gh imp eda nt ; onl y r x 0 = hig h - l evel ? analog blocks are in po w e r do w n ? oscillator n o t runn ing and i n po w e r do w n ? canh x a nd c a nl x are rec e ssive ? vref out put hi gh imp eda nt f o r por not rele ased 7.8 o v e r t e mp er a t u r e dete ctio n a t hermal prot ect i on c i rcuit i s int egr at ed t o preve n t t he t r ansce iver f r om dama ge if t h e ju nct i on t e m perat ur e e x ce eds t herm a l shut do w n leve l . becaus e t h e t r ansmit t e rs d i ssipat e m o st o f t he t o t a l po wer, t he t r ansm i t t e rs w i ll be s w it c h e d of f o n l y t o red u ce po w e r dissi pat i on an d i c t e mperat ur e. all ot her i c f unct i on s cont inu e t o o perat e. 7 . 9 fa ult be hav i or a f ault like a s hort circuit is l i m it ed t o t hat b u s lin e w h ere i t occurs; henc e dat a i n t e rch a nge f r om t h e p r ot ocol i c t o t h e ot her bus sy ste m is no t a ffe cte d . w hen t he v o lt age at t he b u s lines is g o in g out of t he n o rmal o per at in g ran ge (-1 2v t o + 12v), t h e receiv er is n o t allo w e d t o erron eous l y de t e ct a domina n t st at e. 7 . 1 0 short circ uits as specif ie d in t he maximum rat i ngs, short c i rcuit s of t he b u s w i res ca n h x a nd ca nl x t o t he posit ive suppl y vo lt ag e vbat or t o grou nd must n o t dest r o y t h e t r ansce iver. a short circuit bet w e e n canh x and ca nl x mu st not dest r o y t he i c as w e l l . 7 . 1 1 fa ulty supply i n case of a f ault y s u p p l y ( m issing co nn e c t i on of t he el ect r onic u n it o r t he t r ansceiv er t o groun d, missing co nn e c t i on of t h e elect r o n ic un it t o vb at or missi ng c o n nect i o n of t h e t r ansce i v er t o vcc), t h e p o w e r su pp l y mod u le of t h e elect r o n ic un it w i ll o perat e such t hat t h e t r ansce iver is no t suppl ied, i. e. t he volt a ge vc c is be lo w t h e por leve l. i n t h is co ndit i on t h e bus c o n nect i ons o f th e t r ansceiv er mu st be in t he por st at e. i f t he grou nd l i ne of t h e el ect r onic unit is int e rrupt ed, vb at ma y be ap pli e d t o t he vcc pi n (meas ured r e lat i v e t o t he o r igin al grou nd pot ent i a l, t o w h ich t he ot h e r u n it s on t he b u s are con nect e d) . 7 . 1 2 re v e rse ele c t ronic unit (ec u ) supply i f t he con nect i ons f o r gro u n d and sup p l y v o lt age of a n elect r onic un it (ec u ) (ma x . 5 0 v) w h ich pr ovid es vcc f o r t h e t r a n sceiv er ar e exc h a n g ed, t h i s t r ansceiv er h a s a grou nd po t ent ial w h i c h m a y be up t o 5 0 v hig her t h an t hat of t h e ot h e r t r ansceiv ers. i n t h is c as e no t r ansce iver must be dest r o y e d eve n if sev e ral of t hem ar e conn ect ed vi a t he bus s y st e m . an y e x c h a n g e amon g t he si x conn ect i o n s canh1, canh 2 , canl1, ca n l2, grou nd, an d supp l y vo lt a ge of t he elect r onic un it at t he conn ect o r of t he unit mus t never lea d t o t he dest r uct i o n of an y t r ansc e i v er of t he bus s y st em. a m i se m i co nd uc t o r ? o c tober 2 007, rev. 1.0 8 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 8.0 e l ec tr ic al c h ar ac ter i s t i c s 8 . 1 de finitions all v o lt ag es ar e ref e r enc ed t o gnd. pos i t i ve curr ent s f l o w i n t o t h e i c . sinki ng c u rre nt mea n s t h at t h e curr ent is f l o w i n g i n t o the pin. sourc i n g current mea n s t hat t he curre nt is f l o w in g out o f t he pin. 8.2 a b so lu te maxi mu m ratin g s st resses abov e t hose list e d i n t able 4 ma y cause p e rman ent devic e f a il u r e. expos ure t o abso l ut e ma xim u m rat i n g s f o r ext e nde d peri ods ma y af f e ct device rel i abil i t y . tabl e 4: absol u t e maxi mum rati ngs sy mbo l parameter con d iti ons min. max. unit v cc suppl y vol t age -0.3 +7 v v ca nhx dc vol t age at pi n canh1/2 0 < v cc < 5.25v; no ti me l i m i t -45 +45 v v ca nl x dc vol t age at pi n canl1/2 0 < v cc < 5.25v; no ti me l i m i t -45 +45 v v di g i o dc vol t age at di g i tal io pi ns (en1 b, en2b, ri nt, r x 0, text, tx 0) -0.3 v cc + 0.3 v v re f dc vol t age at pi n v ref - 0 . 3 v cc + 0.3 v v tra n ( ca nhx ) transi ent vol t age at pi n canh1/2 note 1 -150 +150 v v tra n ( ca nl x ) transi ent vol t age at pi n canl1/2 note 1 -150 +150 v v e s d ( ca nl x / ca nhx) esd vol t age at c a nh1/2 and ca nl1/2 pi ns note 2 note 4 -4 -500 +4 +500 kv v v esd esd vol t age at a l l other pi ns note 2 note 4 -2 -250 +2 +250 kv v latch-up stati c l a tch-up at al l pi ns note 3 100 ma t stg storage temp era t ure -55 +155 c t am b ambi ent tempera t ure -40 +125 c t j unc maxi mum j uncti on temperatu r e -40 +150 c not e s: (1) app lied tran sien t w a v e forms in accordance w i th ? i so 7637 par t 3?, test p u lse s 1 , 2, 3a , an d 3b ( s ee fig u re 6 ) . (2) s t andar dize d h u man body model ( h bm) esd pu lse s i n accor dance to m i l883 me thod 3015 . supply pin 8 i s 2 kv. (3) s t atic la tch - up i mmunity : stati c latch-up pro t e c tion l e vel w hen te sted a ccording to eia/jesd 78. (4) s t andar dize d ch arged dev ice model esd p u lse s w hen teste d a c cording to eos/e s d ds5 . 3-1 993. 8.3 t h e rmal ch ar acte r istics tabl e 5: th ermal characteri sti cs sy mbo l parameter con d iti ons value unit r th( v j - a) thermal r e si stance from j uncti on to ambi ent i n so20 package in free ai r 85 k/w r th( v j - s ) thermal r e si stance from j uncti on to substrate of ba re di e in free air 45 k/w a m i se m i co nd uc t o r ? o c tober 2 007, rev. 1.0 9 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 8.4 dc ch ara c te ristics v cc = 4. 75 t o 5. 25v; t j unc = -4 0 t o + 150c; r lt =6 0 ? unless specif ie d ot her w i se. tabl e 6: dc and ti mi ng characte ri sti cs sy mbo l parameter con d iti ons min. ty p . max. unit suppl y (pi n v cc ) i cc suppl y curre nt, n o l oads on di gi tal outputs, both busses enabl ed domi nant transm i tted r e cessive trans m itted 45 137.5 19.5 ma ma po rl_vc c power-o n-r e set l e vel on v cc 2 . 2 4 . 7 v digital i n p u ts (t x0, tex t , en1b, en2b) v ih hi gh-l e vel i nput vol t age 0.7 x v cc - v cc v v il lo w - l e vel i nput vol t age -0.3 - 0.3 x v cc v i ih hi gh-l e vel i nput current v in = v cc - 5 0 + 5 a i il lo w - l e vel i nput current v in = 0v -75 -200 -350 a c i input capaci t ance not tested - 5 10 pf digital o u tp uts (pin rx0, ri nt ) i oh hi gh-l e vel output current v o = 0.7 x v cc -5 -10 -15 ma i ol lo w - l e vel output current v o = 0.3 x v cc 5 10 15 ma referen ce vol t a g e out put (pi n v ref1 ) v ref reference ou tput vol t age -50 a < i vr ef < +50 a 0.45 x v cc 0.50 x v cc 0.55 x v cc v v ref_c m reference ou tput vol t age for ful l common mode rang e -35v amis-42770 dual high-speed can transceiver data sheet for long networks f i gure 8: test cir c uit for timing characteristics f i gure 9: timing diagram for a c characteristics amis-4277 0 en1 e n 2 te xt rx0 tx 0 7 9 2 3 10 ri nt 4 can h 2 can l 1 gn d vref vcc 18 13 12 19 14 8 pc20071011 .9 can l 2 can h 1 1 00 n f +5v 5 6 15 16 17 r lt 60 ? r lt 60 ? c lt 100 p f c lt 10 0 pf pc 2007 1012 . 1 tx 0 0,7 v cc 0, 9 v t pd ( h ) 0v 5v v di f f = v c a nhx - v canl x 0, 5 v v c a nx- b us v canhx v canl x re ces s ive d o m i nan t t d(t x -r x ) rx 0 0, 3 v cc 0, 3 v cc t d(t x -b u s on ) 0,7 v cc te xt rint 0,5 v 0,9 v 0,7 v cc 0, 3 v cc t d( t x - r x) t d( t x - b u s o f f ) t d ( buso n - rx ) t d ( buso f f - r x) a m i se m i co nd uc t o r ? o c tober 2 007, rev. 1.0 12 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks f i gure 10: b a sic test set- up for e l ectromagnetic measu r ement f i gure 11: common- mode v o ltage p e aks ( s ee measurement set- up f i gure 10) can h x can l x r e cessive v i(co m ) = 0.5 * (v ca nh x + v can l x ) v cm -peak p d 20 07 06 14 . 1 v cm -peak v cm -s t e p 10 nf 30 ? active probe 30 ? 6.2 k ? 47 nf 6. 2 k ? spect r um anayze r pc20 071011 .10 amis-42770 en1 e n2 te xt rx 0 tx0 7 9 2 3 10 rin t 4 canh 2 canl 1 gn d vref vcc 18 13 12 19 14 8 canl 2 canh 1 1 00 nf +5 v 5 6 15 16 17 ge n a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 13 www.ami s .com speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 9.0 package outline soic-20: plastic small outl i n e ; 20 lea d s; bo d y w i dth 3 00mi l . a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 14 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 10.0 soldering 10.1 introduction t o sold ering s u rface mount packages t h is text giv e s a ver y bri e f in sight to a com p le x tec h n o lo g y . a m o re i n -d epth accou n t o f solder in g ics can be fo un d in the amis ?data h a n d b o o k ic26; inte gra t ed c i rcuit p a c k ages? (doc um ent or der num ber 939 8 652 9 001 1). t here is no sol deri n g method that is ide a l for al l surface mou n t ic packa ges. w a ve sol deri ng i s not al w a ys suitab le for surf ace mou n t ics, or for printed-c i rcuit bo ard s (pcbs) w i t h hi gh po pu latio n dens ities. in thes e situati ons r e -flo w so lder in g is often use d . 10.2 re-flo w so ld erin g re-flo w s o ld eri ng req u ires so l der paste (a su spens ion of fin e sold er particl es, flux a nd bi ndi ng a gent) to be app lie d to the pc b b y screen pri n tin g , stencil lin g or press u re-s yr i n ge disp ens ing before p a ckag e p l acem ent. severa l met h o d s e x ist for r e flo w in g; for examp l e, infrar ed/conv ectio n heati ng i n a c o nve y or t y p e ov en. t h rough pu t times (preh e a t ing, sol deri ng and c ool in g) va r y b e t w e e n 100 a nd 20 0 secon d s dep en din g on he atin g method. t y pi cal re-flo w p e a k temperatures range from 21 5 to 250c. t h e top-surfa c e temperatur e of the packa ges s hou ld pref erab l y b e kept be lo w 2 30 c. 10.3 w a v e so ld erin g conv entio na l s i ngl e w a v e so l deri ng is not r e comme nde d f o r surf ac e m o unt d e vic e s (s mds) or pcbs w i th a hi gh c o mpo nent dens it y , as so l der brid gin g an d n on- w e tti ng can prese n t m a jor pr o b lems. t o overcome t hese pro b l e ms the dou bl e- w a ve sol der in g method w a s sp ecifical l y dev el ope d. if w a ve so lder i ng is use d the follo w i n g con d iti ons must be o b serve d for opt imal resu lts: ? use a d oub le- w a v e s o l deri n g meth od c o m p risin g a turb u l ent w a ve w i th hig h up w a rd pressur e fol l o w e d b y a smo o th lamin a r w a v e . ? f o r packag e s w i t h le ads o n tw o s i d e s an d a pitch (e): larg e r tha n or equ al to 1.27m m, the footpri n t lon g itu d in al a x is is pr eferre d to be par all e l to the trans port directi on o f the pcb; smaller th an 1.27mm, the f ootpri n t lon g itu d in al a x is mus t be par all e l t o the trans por t directio n of the pcb. t he footprint must i n corp orate sol der thiev e s at the do w n stre a m end. ? f o r packag e s w i t h lea d s on f our sid e s, the footpri n t must be plac ed at a 45o ang le to th e tr ansport dir e ction of the p c b. t he footprint must incorp orate solder thi e ves do w n stream a nd at the sid e corners. durin g p l ac em ent a nd before sold erin g, the packa ge m u st be fi x ed w i t h a dro p l e t of ad hesiv e. t he ad hesiv e ca n b e app lie d b y screen pr intin g , pin transfer o r s y rin ge dis p e n sin g . t he pac kage ca n be s o ld ered after th e adh esive is c u red. t y pica l d w e ll tim e is four secon d s a t 250c. a mild l y - a ctivate d flu x w i ll el imin ate the nee d for re moval of corro sive resi dues i n most appl icat ions. 1 0 . 4 ma nua l sol d e r ing f i x th e com p o nent b y first so lderi ng t w o d i a gon all y - o p posit e en d l e a d s. u s e a lo w v o lta ge (2 4v or les s ) sold erin g ir o n ap pl ied to the flat part of the le ad. co nta c t time mu st be limited to 10 s e con d s at up to 300 c. w hen usi ng a ded icate d tool, all oth e r lea d s can be so ld ere d in on e op erat ion w i t h in t w o t o five secon d s bet w e en 2 70 a nd 32 0c. tabl e 7: sol deri ng process solderin g met h od package wav e re-fl o w (1 ) bga, sqfp not sui t abl e sui t abl e hlqfp, hs q f p, hso p , htssop, sms not sui t abl e (2 ) sui t abl e plcc (3 ) , so, s o j sui t abl e sui t abl e lqfp, qfp, t q fp n o t r e co m m e n ded (3 )(4 ) sui t abl e sso p, tss o p, vso not recommend e d (5 ) sui t abl e not e s: 1. all sur f a c e moun t ( s md) package s ar e mo isture sen s itiv e. dependin g upon the moi s tu re conte n t, the max i mum te mperature (w ith respect to time) and b ody size of the p a ckage , the r e is a ri sk tha t inte rnal or ex ternal pack age cracks may o ccu r due to v aporization o f the moi s tur e in them (th e so called popcorn effe ct). for detail s , re fer to the dry pack in forma t ion in the ?data handb ook ic26 ; in tegra t e d circu i t pa cka ges; se ction : pa ckin g method s.? 2. these pa ckage s ar e not sui t able for wav e soldering a s a so lder joint be tw een the pcb and hea tsin k (at bottom v e rsion) can n ot be a c hiev ed, and as so ld er may sti c k to the hea tsin k ( on top v e rsion). 3. if w a v e soldering i s consi dered , the n the pa ckage mu st be plac e d at a 45 angle to th e so ld er w a v e direction . the package f ootp r int mu st in cor pora t e solde r thiev e s dow nstr ea m and a t the side corners. 4. w a v e solderi ng i s only suitable for lq fp, tqfp and qf p package s w i th a pitch (e) equal to o r larger than 0.8mm ; i t i s de fin itely not suitable for p a ckag es w i th a pitch (e ) eq ual to or smalle r than 0.65 mm. 5. w a v e solderin g i s only suitable for s s op and ts sop package s w i th a pi tch (e) equal to or l a rger than 0 . 65mm ; i t i s de finite ly not suitable for pa ckag es w i th a pitch (e ) eq ual to or smalle r than 0.5mm. a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 15 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce amis-42770 dual high-speed can transceiver data sheet for long networks 11.0 revisio n histo r y re v i sio n date descrip tion 1.0 october 2 007 ini t i a l versi on 12.0 company or product inquiries f o r more infor m ation a b o u t ami semicond u c tor?s prod ucts or services visi t our w eb site at http:// w w w . amis.com/sales . dev i ces sold by amis are cov e red b y the w a rranty and paten t indem nifi ca tion prov ision s app earing in its terms of sale only . am is make s no w a rranty , ex press, s t at ut o r y, implied o r by descriptio n , re garding th e info rmation set for t h herein or regarding the fr eedom of the descr ibed dev ices fr om pa ten t infri ngement. amis make s no w a rranty of merchan tabili ty or fitne s s for any purpose s . amis re serv es the rig h t to d i scon ti nue produ ction an d chan ge speci fi ca tions an d pri c e s a t any time and w i thout noti c e. a m i semicond uctor' s produ cts are in tended for u s e in commerci a l appli c ation s . appli c a t io ns requirin g ex tended tempera t ure r ange, unu sual env ironmental requ irements, o r high re liability applica t ion s , su ch a s mili tary , medical li fe- s uppor t or life- su staining e quipme nt, are spe c ifically not recomm ended w i thout additiona l pr oce s si ng by amis for such appli c a t ion s . co py right ?2007 ami semicondu ctor, inc. a m i se m i co nd uc t o r ? october 2 007, rev. 1.0 16 www.ami s .c om speci f i c atio ns subj ect to chang e w i tho u t n o ti ce |
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