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74lcxr2245 ?lo w v olta g e bidirectional t ransceiver with 5v t olerant inputs and outputs and 26 ? series resistor s on both a and b p o r t s ?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 march 2008 74lcxr2245 low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resis tors on both a and b ports features 5v tolerant inputs and outputs 2.3v?.6v v cc specifications provided 8.0ns t pd max. (v cc = 3.3v), 10? i cc max. power down high impedance inputs and outputs supports live insertion/withdrawal (1) ?2ma output drive (v cc = 3.0v) latch-up performance exceeds 500ma equivalent 26 ? series resistor on all outputs esd performance: ? human body model > 2000v ? machine model > 200v note: 1. to ensure the high-impedance state during power up or down, oe should be tied to v cc through a pull-up resistor: the minimum value or the resistor is determined by the current-sourcing capability of the driver. general description the lcxr2245 contains eight non-inverting bidirectional buffers with 3-state outputs and is intended for bus ori- ented applications. the device is designed for low volt- age (2.5v and 3.3v) v cc applications with capability of interfacing to a 5v signal environment. the t/r input determines the direction of data flow through the device. the oe input disables both the a and b ports by placing them in a high impedance state. the 26 ? series resistor helps reduce output overshoot and undershoot. the lcxr2245 is fabricated with an advanced cmos technology to achieve high speed operation while main- taining cmos low power dissipation. or dering inf ormation device also available in tape and reel. specify by appending suffix letter ??to the ordering number. all pac kages are lead free per jedec: j-std-020b standard. or der number pa c k a g e number p a c k a g e description 74lcxr2245wm m20b 20-lead small outline integ r ated circuit (soic), jedec ms-013, 0.300" wide 74lcxr2245sj m20d 20-lead small outline p a c kage (sop), eiaj type ii, 5.3mm wide 74lcxr2245msa msa20 20-lead shr ink small outline p a c kage (ssop), jedec mo-150, 5.3mm wide 74lcxr2245mtc mtc20 20-lead thin shr ink small outline p a c kage (tssop), jedec mo-153, 4.4mm wide implements proprietary noise/emi reduction circuitry
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 2 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports connection diagram pin description logic symbol truth table h = high voltage level l = low voltage level x = immaterial z = high impedance note: 2. unused bus terminals during high z state must be held high or low. logic diagram pin names description oe output enable input t/r tr ansmit/receive input a 0 ? 7 side a inputs or 3-state outputs b 0 ? 7 side b inputs or 3-state outputs inputs outputs oe t/r ll bus b 0 ?b 7 data to bus a 0 ?a 7 lh bus a 0 ?a 7 data to bus b 0 ?b 7 hx high z state on a 0 ?a 7 , b 0 ?b 7 (2)
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 3 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. note: 3. i o absolute maximum rating must be observed. recommended operating conditions (4) the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. note: 4. unused inputs must be held high or low. they may not float. symbol parameter rating v cc supply voltage ?.5v to +7.0v v i dc input voltage ?.5v to +7.0v v o dc output voltage output in 3-state ?.5v to +7.0v output in high or low state (3) ?.5v to v cc + 0.5v i ik dc input diode current, v i < gnd ?0ma i ok dc output diode current v o < gnd ?0ma v o > v cc +50ma i o dc output source/sink current ?0ma i cc dc supply current per supply pin ?00ma i gnd dc ground current per ground pin ?00ma t stg storage temperature ?5? to +150? symbol parameter min. max. units v cc supply voltage operating 2.0 3.6 v data retention 1.5 3.6 v i input voltage 0 5.5 v v o output voltage high or low state 0 v cc v 3-state 0 5.5 i oh / i ol output current v cc = 3.0v?.6v ?2 ma v cc = 2.7v?.0v ? v cc = 2.3v?.7v ? t a f ree-air operating temperature ?0 85 ? ? t / ? v input edge rate, v in = 0.8v?.0v, v cc = 3.0v 0 10 ns / v
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 4 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports dc electrical characteristics note: 5. outputs disabled or 3-state only. ac electrical characteristics note: 6. skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. the specification applies to any outputs switching in the same direction, either high-to-low (t oshl ) or low-to-high (t oslh ). symbol parameter v cc (v) conditions t a = ?0? to +85? units min max v ih high level input voltage 2.3?.7 1.7 v 2.7?.6 2.0 v il low level input voltage 2.3?.7 0.7 v 2.7?.6 0.8 v oh high level output voltage 2.3?.6 i oh = ?00? v cc ?0.2 v 2.3 i oh = ?ma 1.8 2.7 i oh = ?ma 2.2 3.0 i oh = ?ma 2.4 2.7 i oh = ?ma 2.0 3.0 i oh = ?2ma 2.0 v ol low level output voltage 2.3?.6 i ol = 100? 0.2 v 2.3 i ol = 4ma 0.6 2.7 i ol = 4ma 0.4 3.0 i ol = 6ma 0.55 2.7 i ol = 8ma 0.6 3.0 i ol = 12ma 0.8 i i input leakage current 2.3?.6 0 v i 5.5v ?.0 ? i oz 3-state i/o leakage 2.3?.6 0 v o 5.5v, v i = v ih or v il ?.0 ? i off po w er-off leakage current 0 v i or v o = 5.5v 10 ? i cc quiescent supply current 2.3?.6 v i = v cc or gnd 10 ? 2.3?.6 3.6v v i , v o 5.5v (5) ?0 ? i cc increase in i cc per input 2.3?.6 v ih = v cc ?.6v 500 ? symbol parameter t a = ?0? to +85?, r l = 500 ? units v cc = 3.3v ?0.3v, c l = 50pf v cc = 2.7v, c l = 50pf v cc = 2.5v ?0.2v, c l = 30pf min. max. min. max. min. max. t phl , t plh propagation delay, a n to b n or b n to a n 1.5 8.0 1.5 9.0 1.5 9.6 ns t pzl , t pzh output enable time 1.5 9.5 1.5 10.5 1.5 11.0 ns t plz , t phz output disable time 1.5 7.5 1.5 8.5 1.5 9.0 ns t oshl , t oslh output to output skew (6) 1.0 ns
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 5 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports dynamic switching characteristics capacitance symbol parameter v cc (v) conditions t a = 25? unit t ypical v olp quiet output dynamic peak v ol 3.3 c l = 50pf, v ih = 3.3v, v il = 0v 0.5 v 2.5 c l = 30pf, v ih = 2.5v, v il = 0v 0.4 v olv quiet output dynamic valley v ol 3.3 c l = 50pf, v ih = 3.3v, v il = 0v 0.5 v 2.5 c l = 30pf, v ih = 2.5v, v il = 0v 0.4 symbol parameter conditions typical units c in input capacitance v cc = open, v i = 0v or v cc 7pf c out output capacitance v cc = 3.3v, v i = 0v or v cc 8pf c pd po w er dissipation capacitance v cc = 3.3v, v i = 0v or v cc , f = 10mhz 25 pf
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 6 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports ac loading and waveforms (generic for lcx family) figure 1. ac test circuit (c l includes probe and jig capacitance) waveform for inverting and non-inverting functions propagation delay. pulse width and t rec waveforms 3-state output low enable and disable times for logic 3-state output high enable and disable times for logic setup time, hold time and recovery time for logic t rise and t fall figure 2. waveforms (input characteristics; f = 1mhz, t r = t f = 3ns) t est switch t plh , t phl open t pzl , t plz 6v at v cc = 3.3 ?0.3v v cc x 2 at v cc = 2.5 ?0.2v t pzh , t phz gnd symbol v cc 3.3v ?0.3v 2.7v 2.5v ?0.2v v mi 1.5v 1.5v v cc / 2 v mo 1.5v 1.5v v cc / 2 v x v ol + 0.3v v ol + 0.3v v ol + 0.15v v y v oh ?0.3v v oh ?0.3v v oh ?0.15v
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 7 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports schematic diagram (generic for lcx family)
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 8 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports physical dimensions figure 3. 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide pa c kage drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package speci?ations do not expand the terms of fairchilds worldwide terms and conditions, speci?ally the warranty therein, which covers fairchild products. always visit fairchild semiconductors online packaging area for the most recent package drawings: http://www .f airchildsemi.com/pac kaging/ 0.10 c c a see detail a notes: unless otherwise specified a) this package conforms to jedec ms-013, variation ac, issue e b) all dimensions are in millimeters. c) dimensions do not include mold flash or burrs. e) landpattern standard: soic127p1030x265-20l pin one indicator 0.25 1 10 b c a m 20 11 b x45 8 0 seating plane gage plane detail a scale: 2:1 seating plane land pattern recommendation f) drawing filename: mkt-m20brev3 0.65 1.27 2.25 9.50 13.00 12.60 11.43 7.60 7.40 10.65 10.00 0.51 0.35 1.27 2.65 max 0.30 0.10 0.33 0.20 0.75 0.25 (r0.10) (r0.10) 1.27 0.40 (1.40) 0.25 d) conforms to asme y14.5m-1994
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 9 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports physical dimensions (continued) figure 4. 20-lead small outline package (sop), eiaj type ii, 5.3mm wide pa c kage drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package speci?ations do not expand the terms of fairchilds worldwide terms and conditions, speci?ally the warranty therein, which covers fairchild products. always visit fairchild semiconductors online packaging area for the most recent package drawings: http://www .f airchildsemi.com/pac kaging/
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 10 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports physical dimensions (continued) figure 5. 20-lead shrink small outline package (ssop), jedec mo-150, 5.3mm wide pa c kage drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package speci?ations do not expand the terms of fairchilds worldwide terms and conditions, speci?ally the warranty therein, which covers fairchild products. always visit fairchild semiconductors online packaging area for the most recent package drawings: http://www .f airchildsemi.com/pac kaging/
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 11 74lcxr2245 ?low voltage bidirectional transceiver with 5v tolerant inputs and outputs and 26 ? series resistors on both a and b ports physical dimensions (continued) figure 6. 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide pa c kage drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package speci?ations do not expand the terms of fairchilds worldwide terms and conditions, speci?ally the warranty therein, which covers fairchild products. always visit fairchild semiconductors online packaging area for the most recent package drawings: http://www .f airchildsemi.com/pac kaging/
?000 fairchild semiconductor corporation www.fairchildsemi.com 74lcxr2245 rev. 1.2.0 12 tr a d e m a r k s th ef ol l o w i ng inc l udes regis t ered and unregis t ered t r adem ark s and s e rvi c e m a rk s , ow ned b y fairc hi l d s e m i c onduc t o r a nd/ o r i t s gl obal s ubs i d i a ri es , and is not i nt ended t o be an ex haus t i ve li s t of all s uc h t radem ark s . ac ex bu ild it n o w corep lus cros s v olt ct l current trans f e r logi c eco spar k ezsw it ch * fair c h ild fairc hild s e m i c onduc t o r fac t quiet ser ies fac t fast fas t v core flas hw rit e r ? fps fr fet gl obal p o w e r res ourc e sm green fp s green fp s e-s eries gto i- l o in te llim ax iso p l a na r m egab uc k mi crocoup le r mi c r o f e t mi c r o p a k mi ller d r i v e mo ti on-s p m op tologi c op t o p l an ar pd p- spm po w er220 po w e r e d g e po w e r - spm po we rtrenc h pr ogram m a ble a c t i v e droop qfet qs qt opt oelec t r onic s quiet s eries rapidconf i gure sm ar t s tar t spm steal th s uperfet su pers ot -3 s upers ot - 6 s upers ot - 8 s uprem o s sy nc fet the p ow er franc his e tinyb oos t tiny buc k tinylogic tin y opto tiny pow e r tiny pw m tiny w i re se r d e s uhc ul t r a f rf e t uni f e t vc x *e z s w i tch and fl as hw rit e r are t r adem ark s of s y s t em general corporat i on, us ed under l i c e ns e b y f ai rc hi l d s e m i c onduc t or. di s c la im er fa i rchi ld s e m i conduct or re s e r v e s t he ri ght t o m a k e c ha nge s w i t h out f urt h e r not i ce t o a n y p roduct s he re i n t o i m p r ov e r e l i a b i li t y , f unct i o n, or de s i gn. f a i rchi ld doe s not a s s um e a ny li a b i l i t y a ri s i ng out o f t he applic ation or use o f a ny pro duct or ci rcui t d escri bed herei n ; n ei ther does i t conv e y a ny li c e n s e u n d e r i t s patent r i g h t s, n o r t h e r i ghts of othe r s . t h ese spec i fications d o n ot ex pand t he ter m s o f f ai rchi ld? wo rl dw id e t er m s an d c o n d i tio n s, spec ific al l y th e w ar r a n t y t h e r e in , w h i c h c o ver s th ese p r o d u c t s. life su ppor t polic y fa i rchi ld s p r oduct s a r e n ot a u t h ori z e d f o r u s e a s cri t i c a l com p one n t s i n li f e s u p p ort d e v i c e s or system s w ith o u t th e e x p r e ss w r itten appr o v al o f fair c h il d sem ic o n d u c t o r c o r p o r atio n . as us ed herei n: 1. li f e s upport devi c e s o r s ys t e m s are devi c e s o r s ys t e m s wh ic h, (a) a re i n t ended f o r s urgi c a l i m p l ant i n t o t h e body or (b) s upport or s u s t ai n l i f e, and (c ) w hos e f ai l u re t o perf orm wh en properl y u s e d i n a c c ordanc e w i t h i ns t ruc t i ons f o r u s e provided i n t he label i n g, c a n b e reas onably e x p ec t e d t o res ul t i n a s i g ni f i c ant inj u ry of t h e u s er. 2. a c ri t i c a l c om ponent i n any c o m p onent of a l i f e s upport , devi c e , o r s ys t e m w hos e f ai l ure t o perf orm c an be reas onably e x pec t e d t o c aus e t he f a i l ure of t h e l i f e s upport devi c e or s y s t em , o r t o a f f ec t i t s s a f e t y or ef f e c t i v enes s . pr oduct s t a t us de f i ni t i ons defi nit ion o f t erms da tasheet i denti f i c ation p roduct status d e fi niti on ad vanc e i nf orm a t i on form a t i ve or i n des i g n thi s dat as heet c ont ai ns t h e des i g n s pec i f i c at i ons f o r produc t developm ent . s pec i f i c at i o ns m a y c hange in any m anner w i t h out not i c e. pr el i m inary f irst production this dat a s heet c o nt ains prelim inary dat a; s upplem ent ary dat a w ill be publ i s hed at a l at er dat e. fai r c h i l d s em i c onduc t o r res erves t h e r i g ht t o ma ke c hanges at any t i m e w i t hout not i c e t o i m prove des i gn. no i dent i f i c at i o n needed ful l p roduc t i on thi s dat as heet c ont ai ns f i nal s pec i f i c at i o ns . fai rc hi l d s e m i c onduc t o r res e rves t h e r ight t o m a k e c hanges at any t i m e w i t hout not i c e t o i m p rove th e d e s i gn. obs ol et e not i n p r oduc t i on thi s dat as heet c ont ai ns s pec i f i c at i ons on a produc t t hat has been di s c ont i nued by fai rc hi l d s e m i c onduc t or. the dat as heet i s pri nt ed f o r ref e renc e i nf orm a t i on only. re v . i33 on both a and b p o r t s ? 74lcxr2245 ?lo w v olta g e bidirectional t ransceiver with 5v t olerant inputs and outputs and 26 series resistor s

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