unisonic technologies co., ltd UT232E p r e l i m i n a r y cm os ic www.unisonic.com.tw 1 of 5 copyright ? 2013 unisonic technologies co., ltd qw-r502-a19. a high performance rs-232 line drivers/receivers ? descripti on t he u t c ut 2 32e has t w o drivers an d t w o receivers w i th dua l charg e -pum p circuit. it meets rs- 232 d an d v.28 spec ifi c ations. its high p e rforma nce incl udes i n creas ed driv e current for long er an d more fle x i b le cable c onfi gur ations and 10 v/s sle w rat e , 120k bp s guar antee d tra n smissio n rate . f o r easier us e, enh ancem e n ts inclu d e better esd protection for rs-232 i/o pins, l o w po w e r diss ipation and four e x terna l small 0.1 f cha r ge pum p capa citors. ? features * singl e po w e r suppl y: 3.3v~ 5 .5v * lo w p o w e r s uppl y c u rrent: 3.0ma * multipl e drive r s and rece iver s * receiv er in pu t levels: 25v * 3-state outp u t s of tt l/cmos receiver * high output sl e w r a te: 10v/ s under l oad * high data rat e : 120kb p s un der lo ad * f our e x terna l small charg e p u mp cap a citors : 0.1f * ex ceeds 8k v hbm esd protection for rs -232 i/o pins dip-16 sop - 16 ssop-16(209mil) ? or de r i ng i n form at i o n ordering n u m ber package packing lea d f r ee halogen free ut 232el-d1 6- t ut 232eg-d16 - t dip-16 tube ut 232el-s16- t ut 232eg-s16 - t sop-16 tube ut 232el-s16- r ut 232eg-s16 - r sop-16 tape reel ut 232el-r1 6- t ut 232eg-r16 - t ssop-16 tube ut 232el-r1 6- r ut 232eg-r16 - r ssop-16 tape reel http://
UT232E p r e l i m i n a r y cm os ic unisonic technologi es co., ltd 2 of 5 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 1 9 . a ? pin configuration ? p i n de sc ri pt i o n pin no. pin name descript ion 1 c 1 + positive terminal of the voltage doubler charge-pump capacitor 2 v+ positive voltage generated by the charge pump 3 c 1 - negative terminal of the volta ge doubler charge-pump capacitor 4 c 2 + positive terminal of inverting charge-pump capacitor 5 c 2 - negative terminal of inverting charge-pump capacitor 6 v- negative voltage generated by the charge pump 7 t 2 ou t rs-232 transmitter outputs 8 r 2 in rs-232 receiver inputs 9 r 2 out ttl/cmos receiver outputs 10 t 2 in ttl/cmos transmitter inputs 11 t 1 in ttl/cmos transmitter inputs 12 r 1 out ttl/cmos receiver outputs 13 r 1 in rs-232 receiver inputs 14 t 1 ou t rs-232 transmitter outputs 15 gnd ground 16 v cc power supply
UT232E p r e l i m i n a r y cm os ic unisonic technologi es co., ltd 3 of 5 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 1 9 . a ? absolute maxi mu m ra ting s paramet er symbol rat i ngs unit supply voltage range v cc -0.3 ~ +6.0 v positive-output supply voltage range v+ -0.3 ~+7.0 v negative-output supply voltage range v- +0.3 ~ -7.0 v input volta ges t in -0.3 ~ +6.0 v r in -25 ~ +25 v output voltages t out -13.2 ~ +13.2 v r out -0.3 ~ (v cc +0.3) v short circuit d u ratio n t out contin uo us power dissipation p d 375 mw operating temperature t opr 0 ~ +70 note: 1. absol u te maximum ratings ar e tho s e valu es be yond w h ich the device co uld be perm ane ntl y dam ag ed. absol u te ma xi mum ratings ar e stress ratings onl y an d functi onal devic e op er atio n is not i m plie d. 2. all voltag es are w i th res pec t to net w o rk g nd. ? electric al ch ara cteri s tic s (v cc =+5 .0 v; t a = + 25 ; 0.1f charg e pump c apacit ors; t mi n to t ma x unless other w i s e spec ified) parameter symbol test conditions min typ max unit ttl input logic t h resho l d low v tl t in ; en , sd 0.8 v high v th t in ; en , sd 2.0 v logic pull up current i th t in =0v 15 200 a maximum data rate c l = 2500pf , r l =3 k ? 120 kbps ttl output ttl/cmos output voltage lo w v ol i out =1.6ma; v cc = + 5 .0v 0.4 v high v oh i out = - 1.0ma 3.5 v rs-232 output output voltage swing v o(sw) all transmitter outputs lo ad ed with 3k ? to g n d 5.0 6.0 v output resistance r o v cc =0 v; v out =2.0v 300 10m ? output short circuit current i o ( sc ) infinite dur atio n 18 ma rs-232 input voltage range v i ( sw ) -25 + 25 v voltag e t h reshold lo w v th r ( l ) v cc =+5 .0 v, t a = + 25 0.8 1.2 v high v thr ( h ) 1.7 2.4 v hysteresis v hys v cc =+5.0v, t a =+25 0.2 0.5 1.0 v resistance r i t a =+25 , -15v v in +15v 3 5 8 k ? dynamic characteristics propa gatio n d e la y, rs2 32 to t t l t pd 1.5 s instantaneous slew rate sr c l = 220pf , r l =3 k ? -7k ? ; mea s ured from +3 v ~ -3 v o r -3 v ~ +3 v 35 v/s t r ansition reg i on sle w rate sr c l = 2500pf , r l =3 k ? ;measure d from +3 v ~ -3 v o r - 3 v ~ +3 v 10 v/s power requirements v cc power supply current i cc no loa d , t a =+2 5 ; v cc = + 5 .0v 3.0 5.0 ma all transmitters r l =3 k ? , t a = + 25 25 ma
UT232E p r e l i m i n a r y cm os ic unisonic technologi es co., ltd 4 of 5 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 1 9 . a ? functi on descri ption d r i v e r /tra ns mitte r t he drivers are inverti ng tran smitters, w h ic h accept t t l or cmos inputs and o u tput the rs-232 si gn al s w i t h a n inverte d sens e relative to the inp u t log i c lev e ls. t y p i cal l y t he rs- 232 out put volta ge s w ing is 6.0v. even u nde r w o rst case loa d ing co nditi ons of 3k ? and 25 00pf , the output is guarantee d to be 5 .0v, w h ich is consis tent w i th the rs-232 sta nda rd specificati o n s . t he trans mitter outputs are protected a gai nst infi nite sh ort-circuits to ground w i th ou t degr adati on in relia bil it y . t he instantan e ous sl e w rate of the transm i tter outp u t is i n ternal l y lim ited t o a ma ximum of 35v/s. h o w e ver, the transitio n regi o n sle w rate of these e nha nce d prod ucts is t y pical l y 10v/s. t he smooth transition of the lo ade d outp u t from vol to voh clearl y me et s the monoto n icit y r e q u irem ents. recei v e r s t he receivers convert rs-23 2 input sig nals to inverted t t l signals. sinc e the input is us u a ll y from a tran smissio n line, w her e lon g cable len g th s and s y stem interferenc e can degra de the signa l, the inp u ts have a ty p i cal h y ster esis margin of 0.5v. t h is ensures that the receiv er is virtuall y i mmune to noi s y transmiss io n lines. t he input thresho l ds are 0.8v minimum an d 2.4v maxim u m, again w e ll w i thi n the 3.0 v rs-232 requirem ents. t he receiver in puts are als o protected ag ai nst voltag es u p to 25v. sh o u ld an inp u t be left unc onn ect ed, a 5k ? p u ll do w n resistor to gro u n d w i ll commit the out put of the recei ver to a high st ate. in actual s y ste m appl icatio ns, it is quite p o s sible for si gn al s to be ap pli e d to the receiv e r inputs b e fore po w e r is appl ie d to the receiver circ uitr y. t h is occurs, fo r examp l e, w h en a pc user attempts to pri n t, onl y to reali ze the printer w a sn?t turne d on. in this case an rs-23 2 signal from the pc w i ll app ear on the rece iver input at the printer. w hen the printer po w e r is turned on, the receiv e r w i ll op erate n o rmall y. all of these e nha nce d devic es are full y prot ected. charge pump t he charge p u mp sectio n o f the devices allo w s t he ci rc uit to oper ate from a singl e + 5 .0v po w e r s uppl y b y gen eratin g the requir ed oper ating v o ltag es intern al to t he devices. t he c harg e pum p c onsists of a v o ltage dou bler and a volta ge inverter. as sho w n in f i g u re 1, an interna l oscill ator trigg e rs the charge accumulati on and volta g e inversi on. t he voltage d oub l e r momentari l y stores a charge on ca pacito r c1 equa l to v cc , reference d to groun d. durin g the n e x t transition of the oscil l at or this charge is bo ot-strappe d to tra n sf er charg e to capacitor c3. t he voltage across c3 is no w from v cc to v+. in the inverter section as sho w n i n f i gure 2, the voltage ac ross c3 is transfe rred to c2 forcing a ran g e of 0v to v+ across c2 . boot-strappi ng of c2 w i ll then transfer c harge to c 4 to gen erate v-. one of the sig n ifica n t enh ancem ents over previ ous prod ucts of th is t y pe is th at the val ues of th e capac itors ar e no l ong er critical a nd h a v e bee n decre ase d in size co nsi dera b l y to 0.1 f . becaus e t he char ge p u m p runs at a much hi gher fr equ enc y, the 0.1uf capac ito r s are sufficient to transfer and sustain char ge s to the t w o tra n smitters.
UT232E p r e l i m i n a r y cm os ic unisonic technologi es co., ltd 5 of 5 w w w . uniso nic.co m.t w q w - r 5 0 2 - a 1 9 . a ? a p p l i c at ion i n form at i o n t o operate from a single + 5 .0v suppl y, the u t c ut 232 a includ e charg e pump volta g e converters w h ich ca n allo w it. t o generate th e rs- 232 o u tput le v e ls these c onv erters convert t he + 5 .0v in put po w e r to the 6 .0v ne ede d. t he current drain d ue to cha r ge pum p oper ation is co nsid er abl y re duc ed w i th this po w e r supp lie d e x ternal l y . t h e ut c ut 232 a can op erate ov er the commer c ial, ind u st rial and mil i tar y t e mperatur e ran ges. connecting the capacitor to v cc (+5.0v) is recommended. 1 3 0.1f + 4 5 0.1 f + voltage doubler v cc 16 voltage inverte r t 1 14 t 1 out t 1 in 11 40 0k t 2 7 t 2 out t 2 in 10 12 9 r 1 out r 2 out tt l/cmo s input s tt l/cmo s ou tp ut s 5k 0.1f 0.1f + 2 6 r 1 in r 2 in rs- 232 inputs rs- 232 ou tp ut s + +5v input v+ v- 13 8 r 2 r 1 gnd + c 1 + c 1 - c 2 + c 2 - 15 400 k 5k ut c a s s u m e s n o r e s p o n s i b ilit y f o r e q u ip m e n t f a ilu r e s t h a t r e s u lt f r o m u s in g p r o d u cts a t v a lu e s th a t ex ce ed, ev e n m om en t ar i l y , r ate d v a l ue s (s uch as m a x i m um rati ngs , ope ra ti ng con di t i o n ra ng es , o r oth er pa ram eters ) l i s ted i n pr odu cts speci f i c a t i on s of a ny and all u t c p r od ucts d es c r i bed o r contai ne d her ei n. ut c p r od ucts a r e n ot de si gn ed f or us e i n l i f e s upp ort a p p l i ances , de v i ce s o r sy st em s w her e m a l f un cti o n o f thes e p r od ucts ca n b e rea son abl y ex pected to re su l t i n per so n a l i n j u r y . r epr od ucti o n i n w hol e o r i n par t is p r oh i b i t e d w i tho u t the p r i o r w r i tte n con sent o f the co pyr i ght ow n e r . t h e i n f o rm ati o n pre sen ted i n th i s do cum e n t d o e s no t f o r m pa rt of an y q uotati o n or con t ra ct, i s b e l i e v e d to b e a ccu rate and re l i a b l e a nd m a y be cha n g ed w i tho u t n o ti ce.
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