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1. general description the 74lv244at is an 8-bit buffer/line driver with 3-state outputs and ttl inputs. the device features two output enables (1oe and 2oe ). a high on noe causes the associated outputs to assume a high-impedance off-state. designed to operate over a v cc range from 4.5 v to 5.5 v, the inputs are ttl compatible, which allows the device to be used to translate from 3.3 v to 5 v. schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times. this device is fully specified for pa rtial power-down applications using i off . the i off circuitry disables the output, preventin g the damaging backflow current through the device when it is powered down. 2. features and benefits ? direct interface with ttl levels ? supply voltage range from 4.5 v to 5.5 v ? typical t pd of 2.8 ns at 5 v ? typical v ol(p) < 0.8 v at v cc = 5 v, t amb = 25 ? c ? typical v oh(v) > 2.3 v at v cc = 5 v, t amb = 25 ? c ? supports mixed-mode voltage operation on all ports ? i off circuitry provides partial power-down mode operation ? latch-up performance exceeds 250 ma per jesd 78 class ii ? esd protection: ? hbm ansi/esda/jedec js-001 class 2 exceeds 3 kv ? mm jesd22-a115-a exceeds 150 v ? cdm jesd22-c101e exceeds 2 kv ? specified from ? 40 ? c to +85 ? c and from ? 40 ? c to +125 ? c 74lv244at octal buffer/line driver; 3-state rev. 1 ? 23 november 2016 product data sheet downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 2 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 3. ordering information 4. functional diagram table 1. ordering information type number package temperature range name description version 74LV244ATPW ? 40 ? c to +125 ? c tssop20 plastic thin shrink small outline package; 20 leads; body width 4.4 mm sot360-1 fig 1. logic symbol fig 2. iec logic symbol pqd $ $ $ $ < < < < 2( $ $ $ $ < < < < 2( (1 pqd (1 downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 3 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 5. pinning information 5.1 pinning 5.2 pin description fig 3. pin configuration tssop20 /9$7 2( 9 && $ 2( < < $ $ < < $ $ < < $ $ < < *1' $ ddd table 2. pin description symbol pin description 1oe , 2oe 1, 19 output enable input (active low) 1a0, 1a1, 1a2, 1a3 2, 4, 6, 8 data input 2y0, 2y1, 2y2, 2y3 3 , 5, 7, 9 data output gnd 10 ground (0 v) 2a0, 2a1, 2a2, 2a3 17, 15, 13, 11 data input 1y0, 1y1, 1y2, 1y3, 18, 16, 14, 12 data output downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 4 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 6. functional description [1] h = high voltage level; l = low voltage level; x = don?t care; z = high-impedance off-state. 7. limiting values [1] the minimum input voltage ratings may be excee ded if the input current ratings are observed. [2] the output voltage ratings may be exceeded if the output current ratings are observed. [3] this value is limited to 7.0 v maximum. [4] for tssop20 package: above 100 ? c the value of p tot derates linearly with 10 mw/k. table 3. function table [1] control input output noe nan nyn lll lhh hxz table 4. limiting values in accordance with the absolute maximum rating system (iec 60134). voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min max unit v cc supply voltage ? 0.5 +7.0 v v i input voltage [1] ? 0.5 +7.0 v v o output voltage active mode [2] [3] ? 0.5 v cc + 0.5 v power-down or 3-state mode [2] ? 0.5 +7.0 v i ik input clamping current v i < 0 v ? 20 - ma i ok output clamping current v o <0v ? 50 - ma i o output current v o = 0 v to v cc - ? 35 ma i cc supply current - 70 ma i gnd ground current ? 70 - ma t stg storage temperature ? 65 +150 ? c p tot total power dissipation t amb = ? 40 ? c to +125 ? c [4] - 500 mw downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 5 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 8. recommended operating conditions 9. static characteristics table 5. recommended operating conditions voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min max unit v cc supply voltage 4.5 5.5 v v i input voltage 0 5.5 v v o output voltage active mode 0 v cc v power-down or 3-state mode 0 5.5 v t amb ambient temperature ? 40 +125 ? c ? t/ ? v input transition rise and fall rate v cc = 5.0 v ? 0.5 v - 20 ns/v table 6. static characteristics voltages are referenced to gnd (ground = 0 v). symbol parameter conditions 25 ? c ? 40 ? c to +85 ? c ? 40 ? c to +125 ? c unit min typ max min max min max v ih high-level input voltage v cc = 4.5 v to 5.5 v 2 - - 2 - 2 - v v il low-level input voltage v cc = 4.5 v to 5.5 v - - 0.8 - 0.8 - 0.8 v v oh high-level output voltage v i = v ih or v il ; v cc = 4.5 v i o = ? 50 ? a 4.4 4.5 - 4.4 - 4.4 - v i o = ? 16 ma 3.94 - - 3.8 - 3.8 - v v ol low-level output voltage v i = v ih or v il ; v cc = 4.5 v i o = 50 ? a - 0 0.1 - 0.1 - 0.1 v i o = 16ma - - 0.44 - 0.55 - 0.55 v i oz off-state output current v cc = 5.5 v; v i =v ih or v il ; v o = gnd to 5.5 v -- ? 0.25 - ? 2.5 - ? 2.5 ? a i off power-off leakage current v i or v o = gnd to 5.5 v; v cc =0 v --0 . 5- 5 - 5 ? a i i input leakage current v i =v cc or gnd; v cc =0vto5.5v -- ? 0.1 - ? 1- ? 1 ? a i cc supply current v i =v cc or gnd; i o = 0 a; v cc =5.5v --2 - 2 0 - 2 0 ? a ? i cc additional supply current per input pin; v i =3.4v; i o = 0 a; other pins at v cc or gnd; v cc =5.5v --1 . 3 5- 1 . 5 - 1 . 5m a downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 6 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 10. dynamic characteristics [1] typical values are measured at t amb =25 ? c and v cc = 5 v. [2] t pd is the same as t plh and t phl . t en is the same as t pzl and t pzh . t dis is the same as t plz and t phz . [3] c pd is used to determine the dynamic power dissipation p d ( ? w). p d =c pd ? v cc 2 ? f i + ? (c l ? v cc 2 ? f o )where: f i = input frequency in mhz; f o = output frequency in mhz; c l = output load capacitance in pf; v cc = supply voltage in volts. table 7. dynamic characteristics gnd = 0 v. for test circuit see figure 6 . symbol parameter conditions 25 ? c ? 40 ? c to +85 ? c ? 40 ? c to +125 ? c unit min typ [1] max min max min max t pd propagation delay nantonyn; see figure 4 [2] v cc = 4.5 v to 5.5 v c l = 15 pf - 2.8 7.4 1 8.5 1 8.5 ns c l = 50 pf - 4 8.9 1 9.5 1 9.5 ns t en enable time noe to nyn; see figure 5 v cc = 4.5 v to 5.5 v c l = 15 pf - 3.7 10.4 1 12 1 12 ns c l = 50 pf - 4.9 11.4 1 13 1 13 ns t dis disable time noe to nyn; see figure 5 [2] v cc = 4.5 v to 5.5 v c l =15pf - 3.5 7.7 1 8 1 8 ns c l = 50 pf - 5.8 11.4 1 13 1 13 ns t sk(o) skew v cc = 4.5 v to 5.5 v; c l =50pf --1- 1 - 1n s c i input capacitance v i =v cc or gnd; v cc =5v -26- 6 - 6p f c o output capacitance v o =v cc or gnd; v cc =5v -5- - - - -p f c pd power dissipation capacitance per buffer; c l =50pf;f=10 mhz; v i =gndtov cc [3] -1 1- - - - -p f downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 7 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 11. waveforms table 8. noise characteristics gnd = 0 v. for test circuit see figure 6 . symbol parameter conditions t amb = 25 ? c unit min typ max v cc = 5 v; c l =50pf v ol(p) low-level output voltage (peak) - 0.6 1.5 v v ol(v) low-level output voltage (valley) ? 1.5 ? 0.6 - v v oh(v) high-level output voltage (valley) - 4.0 - v v ih(ac) ac high-level input voltage (dynamic) 2 - - v v il(ac) ac low-level input voltage (dynamic) - - 0.8 v measurement points are given in table 9 . v ol and v oh are typical voltage output levels that occur with the output load. fig 4. propagation delay input (an) to output (yn) pqd q$qlqsxw q<qrxwsxw w 3/+ w 3+/ *1' 9 , 9 0 9 0 9 0 9 0 9 2+ 9 2/ measurement points are given in table 9 . v ol and v oh are typical voltage output levels that occur with the output load. fig 5. enable and disable times pqd w 3/= w 3+= rxwsxwv glvdeohg rxwsxwv hqdeohg 9 < 9 ; rxwsxwv hqdeohg rxwsxw /2:wr2)) 2))wr/2: rxwsxw +,*+wr2)) 2))wr+,*+ q2(lqsxw 9 , 9 2/ 9 2+ 9 && 9 0 *1'*1' w 3=/ w 3=+ 9 0 9 0 downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 8 of 13 nexperia 74lv244at octal buffer/line driver; 3-state table 9. measurement points input output v m v m v x v y 1.5 v 0.5v cc v ol + 0.3 v v oh ? 0.3 v test data is given in table 10 . definitions test circuit: r t = termination resistance should be equal to output impedance z o of the pulse generator c l = load capacitance including jig and probe capacitance r l = load resistor s1 = test selection switch fig 6. test circuit for measuring switching times 9 0 9 0 w : w : 9 9 , 9 , qhjdwlyh sxovh srvlwlyh sxovh 9 9 0 9 0 w i w u w u w i ddg '87 9 && 9 && 9 , 9 2 5 7 5 / 6 & / rshq * table 10. test data input load s1 position v i t r , t f c l r l t phl , t plh t pzh , t phz t pzl , t plz gnd to 3.0v 3.0ns 15pf, 50pf 1k ? open gnd v cc downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 9 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 12. package outline fig 7. package outline sot360-1 (tssop20) 81,7 $ $ $ e s f ' ( h + ( / / s 4 = \ z y 5()(5(1&(6 287/,1( 9(56,21 (8523($1 352-(&7,21 ,668('$7( ,(& -('(& -(,7$ pp r r ',0(16,216ppduhwkhruljlqdoglphqvlrqv 1rwhv 3odvwlfruphwdosurwuxvlrqvripppd[lpxpshuvlghduh qrwlqfoxghg 3odvwlflqwhuohdgsurwuxvlrqvripppd[lpxpshuvlghdu hqrwlqfoxghg 627 02 z 0 e s ' = h slqlqgh[ $ $ $ / s 4 ghwdlo; / $ + ( ( f y 0 $ ; $ \ pp vfdoh 76623sodvwlfwklqvkulqnvpdoorxwolqhsdfndjhohdgve rg\zlgwkpp 627 $ pd[ downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 10 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 13. abbreviations 14. revision history table 11. abbreviations acronym description cdm charge device model dut device under test esd electrostatic discharge hbm human body model mm machine model ttl transistor-transistor logic table 12. revision history document id release date data sheet status change notice supersedes 74lv244at v.1 20161123 product data sheet - - downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 11 of 13 nexperia 74lv244at octal buffer/line driver; 3-state 15. legal information 15.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term ?short data sheet? is explained in section ?definitions?. [3] the product status of device(s) described in this document may have changed since this document was publ ished and may differ in case of multiple device s. the latest product status information is available on the internet at url http://www.nexperia.com . 15.2 definitions draft ? the document is a draft versi on only. the content is still under internal review and subject to formal approval, which may result in modifications or additions. nexperia does not give any representations or warranties as to the accuracy or completeness of information included herein and shall hav e no liability for the consequences of use of such information. short data sheet ? a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request vi a the local nexperia sales office. in case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. product specification ? the information and data provided in a product data sheet shall define the specification of the product as agreed between nexperia and its customer , unless nexperia and customer have explicitly agreed otherwis e in writing. in no event however, shall an agreement be valid in which the nexperia product is deemed to offer functions and qualities beyond those described in the product data sheet. 15.3 disclaimers limited warranty and liability ? information in this document is believed to be accurate and reliable. however, nexperia does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such info rmation. nexperia takes no responsibility for the content in this document if provided by an information source outside of nexperia. in no event shall nexperia be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. notwithstanding any damages that customer might incur for any reason whatsoever, nexperias aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the terms and conditions of commercial sale of nexperia. right to make changes ? nexperia reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof. suitability for use ? nexperia products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of a nexperia product can reasonably be expected to result in personal injury, death or severe property or environmental damage. nexperia and its suppliers accept no liability for inclusion and/or use of nexperia products in such equipment or applications and therefore such inclusion and/or use is at the customer?s own risk. applications ? applications that are described herein for any of these products are for illustrative purpos es only. nexperia makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. customers are responsible for the design and operation of their applications and products using nexperia products, and nexperia accepts no liability for any assistance with applications or customer product design. it is customer?s sole responsibility to determine whether the nexperia product is suitable and fit for the customer?s applications and products planned, as well as fo r the planned application and use of customer?s third party customer(s). customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. nexperia does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer?s applications or products, or the application or use by customer?s third party customer(s). customer is responsible for doing all necessary testing for the customers applications and products using nexperia products in order to av oid a default of the applications and the products or of the application or use by customer?s third party customer(s). nexperia does not accept any liability in this respect. limiting values ? stress above one or more limiting values (as defined in the absolute maximum ratings system of iec 60134) will cause permanent damage to the device. limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the recommended operating conditions section (if present) or the characteristics sections of this document is not warranted. constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. terms and conditions of commercial sale ? nexperia products are sold subject to the gener al terms and conditions of commercial sale, as published at http://www.nexperia.com/profile/terms , unless otherwise agreed in a valid written individual agreement. in case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. nexperia hereby expressly objects to applying the customer?s general terms and conditions with regard to the purchase of nexperia products by customer. no offer to sell or license ? nothing in this document may be interpreted or construed as an offer to sell products t hat is open for acceptance or the grant, conveyance or implication of any lic ense under any copyrights, patents or other industrial or intellectual property rights. document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objecti ve specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this document contains the product specification. downloaded from: http:///
? nexperia b.v. 2017. all rights reserved 74lv244at all information provided in this document is subject to legal disclaimers. product data sheet rev. 1 ? 23 november 2016 12 of 13 nexperia 74lv244at octal buffer/line driver; 3-state export control ? this document as well as the item(s) described herein may be subject to export control regu lations. export might require a prior authorization from competent authorities. non-automotive qualified products ? unless this data sheet expressly states that this specific nexperia product is automotive qualified, the product is not suitable for automotive use. it is neither qualified nor tested in accordance with automotive testing or application requirements. nexperia accepts no liabili ty for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. in the event that customer uses t he product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without nexperias warranty of the product for such automotive applicat ions, use and specifications, and (b) whenever customer uses the product for automotive applications beyond nexperias specifications such use shall be solely at customer?s own risk, and (c) customer fully indemnifies nexperia for any liability, damages or failed product claims resulting from customer design and use of the product for automotive app lications beyond nexperias standard warranty and nexperias product specifications. translations ? a non-english (translated) version of a document is for reference only. the english version shall prevail in case of any discrepancy between the translated and english versions. 15.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. 16. contact information for more information, please visit: http://www.nexperia.com for sales office addresses, please send an email to: salesaddresses@nexperia.com downloaded from: http:///
nexperia 74lv244at octal buffer/line driver; 3-state 17. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 ordering information . . . . . . . . . . . . . . . . . . . . . 2 4 functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 5 pinning information . . . . . . . . . . . . . . . . . . . . . . 3 5.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 functional description . . . . . . . . . . . . . . . . . . . 4 7 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4 8 recommended operating conditions. . . . . . . . 5 9 static characteristics. . . . . . . . . . . . . . . . . . . . . 5 10 dynamic characteristics . . . . . . . . . . . . . . . . . . 6 11 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 12 package outline . . . . . . . . . . . . . . . . . . . . . . . . . 9 13 abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 10 14 revision history . . . . . . . . . . . . . . . . . . . . . . . . 10 15 legal information. . . . . . . . . . . . . . . . . . . . . . . 11 15.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 11 15.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 15.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 15.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 12 16 contact information. . . . . . . . . . . . . . . . . . . . . 12 17 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 23 november 2016 downloaded from: http:/// ? nexperia b.v. 2017. all rights reserved for more information, please visit: http://www.nexperia.com for sales office addresses, please send an email to: salesaddresses@nexperia.com date of release:

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