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74lcx244 ? low v o lt age buffer/line driver with 5v t o lerant input s and output s ?1 994 fairchil d s e micond uctor cor pora t io n www.fair c h ildsemi.com 74 lcx24 4 re v. 1.1 2 . 1 f ebrua ry 20 09 74lcx244 low voltage buffer/line driver with 5v tolerant inputs and outputs features 5 v tol e rant inpu ts and o u tputs 2. 3v to 3 . 6 v v cc spe c i f i c ati ons provid ed 6. 5n s t pd max. (v cc = 3.3v), 10 a i cc ma x . po wer down h i gh impe dan ce i nputs and ou tp uts su ppo rts live inse rtio n/withdraw al (1) 24ma output drive (v cc = 3. 0 v ) l a tch-up pe rforman c e e xceeds 500 ma esd performance: ? h uma n b ody mode l > 2 000v ? m achi ne model > 20 0v leadless dqfn package note : 1. to e n sure th e hig h -imped ance state d u ring p o wer up or down , oe shou ld be tied to v cc throu gh a pu ll-up resistor: the mini mu m valu e or the re si sto r is determin ed by the cu rre n t-so urcing cap abil i ty of th e driver. ge neral des c ription th e lcx24 4 co nta i ns ei ght no n-inverting buffers with 3-st at e ou tp uts. t he device may be emplo y ed a s a memory add ress driver, clock dri v e r and bus-orie n ted tra n smitte r/recei v er. th e lc x2 44 is de signe d for l o w voltag e (2.5v or 3.3v) v cc appl ication s with ca pab ility of in terfacin g to a 5v sign al envi r o n ment. th e lc x2 44 i s fab r icated wi th an ad vanced cmos tech- no logy to achi eve high spe ed opera t i on while main ta in- in g c m os l o w pow er d i ssipa tio n . ordering information note : 2. dqfn packag e avail abl e i n tap e and re el onl y. device a l so avail able i n tap e and ree l . sp ecify by ap pend ing suffix l e tte r ?x? to the orde ri ng nu mb er. all p a ckag e s a r e l ead free pe r jedec: j-st d-020b st a nda rd. order number pa ck ag e number pa cka ge des c ript ion 74l cx244 wm m20 b 20 -lead sma ll outlin e in te grated c i rcuit (soic), jedec ms-01 3 , 0.300" wid e 74l cx244 sj m20d 20 -lead smal l outlin e package (sop), e i aj type ii, 5.3mm wide 74l cx244 bqx (2 ) ml p20b 20 -t e r mi nal de popu lated quad v e ry-th i n fl at pack no lea ds (d qf n), jedec mo-24 1 , 2.5 x 4.5 m m 74l cx244 msa m sa20 2 0 - lead shri nk small outline packag e (ssop), jedec mo-1 50, 5 . 3 m m wid e 74l cx244 mt c mtc20 20 -lead t h in sh ri nk smal l outli ne package (t ssop), jedec mo-15 3 , 4.4mm w i de imple m ents proprietary noi se/emi re duction circu i try
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 2 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs connection diagram pin assignments for soic , sop, ssop, and tssop pad assignments for dqfn (top through view) pin description logic diagram truth tables h ! high voltage level l ! low voltage level x ! immaterial z ! high impedance pin names description oe 1 , oe 2 3-state output enable inputs i 0 ?i 7 inputs o 0 ?o 7 outputs inputs outputs oe 1 i n (pins 12, 14, 16, 18) ll l lh h hx z inputs outputs oe 2 i n (pins 3, 5, 7, 9) ll l lh h hx z
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 3 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs 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 c onditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stre sses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. note: 3. i o absolute maximum ra ting must be observed. recommended oper ating conditions (4) the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ensure optimal perfor mance to the datasheet specif ications. 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 ?0.5v to +7.0v v i dc input voltage ?0.5v to +7.0v v o dc output voltage output in 3-state ?0.5v to +7.0v output in high or low state (3) ?0.5v to v cc + 0.5v i ik dc input diode current, v i # gnd ?50ma i ok dc output diode current v o # gnd ?50ma v o " v cc +50ma i o dc output source/sink current 50ma i cc dc supply current per supply pin 100ma i gnd dc ground current per ground pin 100ma t stg storage temperature ?65c to +150c 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 3-state 0 5.5 v high or low state 0 v cc i oh / i ol output current v cc ! 3.0v?3.6v 24 ma v cc ! 2.7v?3.0v 12 v cc ! 2.3v?2.7v 8 t a free-air operating temperature ?40 85 c $ t / $ v input edge rate, v in ! 0.8v?2.0v, v cc ! 3.0v 0 10 ns / v
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 4 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs 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 specific ation 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 = ?40c to +85c units min. max. v ih high level input voltage 2.3?2.7 1.7 v 2.7?3.6 2.0 v il low level input voltage 2.3?2.7 0.7 v 2.7?3.6 0.8 v oh high level output voltage 2.3?3.6 i oh = ?100a v cc ? 0.2 v 2.3 i oh = ?8ma 1.8 2.7 i oh = ?12ma 2.2 3.0 i oh = ?18ma 2.4 i oh = ?24ma 2.2 v ol low level output voltage 2.3?3.6 i ol = 100a 0.2 v 2.3 i ol = 8ma 0.6 2.7 i ol = 12ma 0.4 3.0 i ol = 16ma 0.4 i ol = 24ma 0.55 i i input leakage current 2.3?3.6 0 v i 5.5v 5.0 a i oz 3-state output leakage 2.3?3.6 0 v o 5.5v, v i = v ih or v il 5.0 a i off power-off leakage current 0 v i or v o = 5.5v 10 a i cc quiescent supply current 2.3?3.6 v i = v cc or gnd 10 a 3.6v v i , v o 5.5v (5) 10 i cc increase in i cc per input 2.3?3.6 v ih = v cc ? 0.6v 500 a symbol parameter t a = ?40c to +85c, 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, data to output 1.5 6.5 1.5 7.5 1.5 7.8 ns t pzl , t pzh output enable time 1. 5 8.0 1.5 9.0 1.5 10.0 ns t plz , t phz output disable time 1.5 7.0 1.5 8.0 1.5 8.4 ns t oshl , t oslh output to output skew (6) 1.0 ns
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 5 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs dynamic switching characteristics capacitance symbol parameter v cc (v) conditions t a = 25c unit typical v olp quiet output dynamic peak v ol 3.3 c l = 50pf, v ih = 3.3v, v il = 0v 0.8 v 2.5 c l = 30pf, v ih = 2.5v, v il = 0v 0.6 v olv quiet output dynamic valley v ol 3.3 c l = 50pf, v ih = 3.3v, v il = 0v ?0.8 v 2.5 c l = 30pf, v ih = 2.5v, v il = 0v ?0.6 symbol parameter conditions typical units c in input capacitance v cc = open, v i = 0v or v cc 7.0 pf c out output capacitance v cc = 3.3v, v i = 0v or v cc 8.0 pf c pd power dissipation capacitance v cc = 3.3v, v i = 0v or v cc , f = 10mhz 25.0 pf
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 3 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs 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 c onditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stre sses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. note: 3. i o absolute maximum ra ting must be observed. recommended oper ating conditions (4) the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ensure optimal perfor mance to the datasheet specif ications. 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 ?0.5v to +7.0v v i dc input voltage ?0.5v to +7.0v v o dc output voltage output in 3-state ?0.5v to +7.0v output in high or low state (3) ?0.5v to v cc + 0.5v i ik dc input diode current, v i # gnd ?50ma i ok dc output diode current v o # gnd ?50ma v o " v cc +50ma i o dc output source/sink current 50ma i cc dc supply current per supply pin 100ma i gnd dc ground current per ground pin 100ma t stg storage temperature ?65c to +150c 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 3-state 0 5.5 v high or low state 0 v cc i oh / i ol output current v cc ! 3.0v?3.6v 24 ma v cc ! 2.7v?3.0v 12 v cc ! 2.3v?2.7v 8 t a free-air operating temperature ?40 85 c $ t / $ v input edge rate, v in ! 0.8v?2.0v, v cc ! 3.0v 0 10 ns / v
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 7 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs schematic diagram (generic for lcx family)
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 8 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs tape and reel specification tape format for dqfn tape dimension inches (millimeters) reel dimensions inches (millimeters) package designator tape section number of cavities cavity status cover tape status bqx leader (start end) 125 (typ.) empty sealed carrier 3000 filled sealed trailer (hub end) 75 (typ.) empty sealed tape sizeabcdnw1w2 12mm 13.0 (330.0) 0.059 (1.50) 0.512 (13.00) 0.795 (20.20) 2.165 (55.00) 0.488 (12.4) 0.724 (18.4)
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 9 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs physical dimensions figure 3. 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide package drawings are provided as a service to customers considering fairchil d components. drawings may change in any manner without notice. please note the revision and/or date on the draw ing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild? s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online pack aging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ . 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 ca m 20 11 b x 45 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
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 10 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs physical dimensions (continued) figure 4. 20-lead small outline package (sop), eiaj type ii, 5.3mm wide package drawings are provided as a service to customers considering fairchil d components. drawings may change in any manner without notice. please note the revision and/or date on the draw ing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild? s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online pack aging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 11 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs physical dimensions (continued) figure 5. 20-terminal depopulated quad very-thin fl at pack no leads (dqfn), jedec mo-241, 2.5 x 4.5mm pacae drains are roided as a serice to customers considerin fairchi d comonents drains ma chane in an manner ithout notice pease note the reision andor date on the dra in and contact a fairchid semiconductor reresentatie to er if or otain the most recent reision pacae secifications do not eand the terms of fairchid s ordide terms and conditions secifica the arrant therein hich coers fairchid roducts aas isit fairchid semiconductors onine ac ain area for the most recent acae drains httfairchidsemicomacain
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 12 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs physical dimensions (continued) figure 6. 20-lead shrink small outline package (ssop), jedec mo-150, 5.3mm wide package drawings are provided as a service to customers considering fairchil d components. drawings may change in any manner without notice. please note the revision and/or date on the draw ing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild? s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online pack aging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 13 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs physical dimensions (continued) figure 7. 20-lead thin shrink small outl ine package (tssop), jedec mo-153, 4.4mm wide package drawings are provided as a service to customers considering fairchil d components. drawings may change in any manner without notice. please note the revision and/or date on the draw ing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild? s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online pack aging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
?1994 fairchild semiconductor corporation www.fairchildsemi.com 74lcx244 rev. 1.12.1 14 trademarks the following includes registered and unregistered trademarks and service marks, owned by fairchild s emiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. build it now coreplu s corepower crossvolt ctl? current transfer logic? eco s p a rk ? efficentmax? ez s witch? * ? ? fairchild ? fairchild s emiconductor ? f a ct quiet s eries? f a ct ? f as t ? fastvcore flashwriter ? * fp s f-pf s frfet ? global power resource s m green fp s green fp s e- s eries gto intellim ax i s opl a n a r megabuck? microcoupler microfet micropak millerdrive? motionmax? motion- s pm? optologic ? optopl a n a r ? ? pdp s pm? power- s pm powertrench ? power xs ? programmable a ctive droop qfet ? q s quiet s eries rapidconfigure ? s aving our world, 1mw/w/kw at a time? s martmax? s m a rt s t a rt s pm ? s te a lth? s uperfet s uper s ot -3 s uper s ot - 6 s uper s ot -8 s upremo s ? s yncfet? ? the power franchise ? tinyboost tinybuck tinylogic ? tin y opto tinypower tinypwm tinywire trifault detect p s erdes uhc ? ultra frfet unifet v c x v isualmax xs ? * ez s witch? and flashwriter ? are trademarks of s ystem general corporation, used under license by fairchild s emiconductor. disclaimer f a irchild s emiconductor re s er v e s the right to m a ke ch a nge s without further notice to a n y product s herein to impro v e reli a bilit y , function, or de s ign. f a irchild doe s not ass ume a n y li a bilit y a ri s ing out of the a pplic a tion or u s e of a n y product or circuit de s cribed herein; neither doe s it con v e y a n y licen s e under it s p a tent right s , nor the right s of other s . the s e s pecific a tion s do not e x p a nd the term s of f a irchild? s worldwide term s a nd condition s , s pecific a ll y the w a rr a nt y therein, which co v er s the s e product s . life support policy f a irchild? s product s a re not a uthorized for u s e as critic a l component s in life s upport de v ice s or sys tem s without the e x pre ss written a ppro va l of f a irchild s emiconductor corpor a tion. a s used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2 . a critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. anti-counterfeiting policy fairchild s emiconductor corporation's a nti-counterfeiting policy. fairchild's a nti-counterfeiting policy is also stated on our external website, www.fairchildsemi.com, under s ales s upport. counterfeiting of semiconductor parts is a growing problem in the industry. a ll manufacturers of semiconductor products are experiencing counterfeiting of their parts. customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard p erformance, failed applications, and increased cost of production and manufacturing delays. fairchild is taking strong measures to protect ourselves and our cus tomers from the proliferation of counterfeit parts. fairchild strongly encourages customers to purchase fairchild parts either directly from fairchild or from a uthorized fairchild distributors who are listed by country on our web page cited above. products customers buy either from fairchild directly or from a uthorized fairchild distributors are genuine parts, have full traceability, meet fairchild's quality standards for handling and storage and provide access to fairchild's full range of up-to-date technical and product information. fairchild and our a uthorized distributors will stand behind all warranties and will appropriately address any warranty issues that may arise. fair child will not provide any warranty coverage or other assistance for parts bought from unauthorized s ources. fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. product status definitions definition of terms datasheet identification product status definition a dvance information formative / in design datasheet contains the design specifications for product development. s pecifications may change in any manner without notice. preliminary first production datasheet contains preliminary data; supplementary data will be published at a later date. fairchild s emiconductor reserves the right to make changes at any time without notice to improve design. no identification needed full production datasheet contains final specifications. fairchild s emiconductor reserves the right to make changes at any time without notice to improve the design. obsolete not in production datasheet contains specifications on a product that is discontinued by fairchild s emiconductor. the datasheet is for reference information only. rev. i38 74lcx244 ? low voltage buffer/line driver with 5v tolerant inputs and outputs

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