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features description/ordering information sn74lvc4245a octal bus transceiver and 3.3-v to 5-v shifter with 3-state outputs scas375h ? march 1994 ? revised march 2005 bidirectional voltage translator 5.5 v on a port and 2.7 v to 3.6 v on b port control inputs v ih /v il levels are referenced to v cca voltage latch-up performance exceeds 250 ma per jesd 17 esd protection exceeds jesd 22 ? 2000-v human-body model (a114-a) ? 200-v machine model (a115-a) ? 1000-v charged-device model (c101) this 8-bit (octal) noninverting bus transceiver contains two separate supply rails; b port has v ccb , which is set at 3.3 v, and a port has v cca , which is set at 5 v. this allows for translation from a 3.3-v to a 5-v environment, and vice versa.
the sn74lvc4245a is designed for asynchronous communication between data buses. the device transmits data from the a bus to the b bus or from the b bus to the a bus, depending on the logic level at the direction-control (dir) input. the output-enable ( oe) input can be used to disable the device so the buses are effectively isolated. the control circuitry (dir, oe) is powered by v cca . the sn74lvc4245a pinout allows the designer to switch to a normal all-3.3-v or all-5-v 20-pin '245 device without board re-layout. the designer uses the data paths for pins 2?11 and 14?23 of the sn74lvc4245a to align with the conventional '245 pinout. ordering information t a package (1) orderable part number top-side marking tube of 25 sn74lvc4245adw soic ? dw lvc4245a reel of 2000 sn74lvc4245adwr ssop ? db reel of 2000 sn74lvc4245adbr lj245a ?40 c to 85 c tube of 60 sn74lvc4245apw tssop ? pw reel of 2000 sn74lvc4245apwr lj245a reel of 250 sn74lvc4245apwt (1) package drawings, standard packing quantities, thermal data, symbolization, and pcb design guidelines are available at www.ti.com/sc/package. function table inputs operation oe dir l l b data to a bus l h a data to b bus h x isolation please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. production data information is current as of publication date. copyright ? 1994?2005, texas instruments incorporated products conform to specifications per the terms of the texas instruments standard warranty. production processing does not necessarily include testing of all parameters. www .ti.com db, dw , or pw p ackage (t op view) 12 3 4 5 6 7 8 9 10 1 1 12 2423 22 21 20 19 18 17 16 15 14 13 (5 v) v c c a dir a1a2 a3 a4 a5 a6 a7 a8 gndgnd v c c b (3.3 v) v c c b (3.3 v) oe b1b2 b3 b4 b5 b6 b7 b8 gnd
absolute maximum ratings (1) sn74lvc4245a octal bus transceiver and 3.3-v to 5-v shifter with 3-state outputs scas375h ? march 1994 ? revised march 2005 logic diagram (positive logic) over operating free-air temperature range for v cca = 4.5 v to 5.5 v (unless otherwise noted) min max unit v cca supply voltage range ?0.5 6.5 v a port (2) ?0.5 v cca + 0.5 v i input voltage range v control inputs ?0.5 6 v o output voltage range a port (2) ?0.5 v cca + 0.5 v i ik input clamp current v i < 0 ?50 ma i ok output clamp current v o < 0 ?50 ma i o continuous output current 50 ma continuous current through each v cca or gnd 100 ma db package 63 q ja package thermal impedance (3) dw package 46 c/w pw package 88 t stg storage temperature range ?65 150 c (1) stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) this value is limited to 6 v maximum. (3) the package thermal impedance is calculated in accordance with jesd 51-7. 2 www .ti.com dir oe a1 b1 t o seven other channels 23 2221
absolute maximum ratings (1) recommended operating conditions (1) recommended operating conditions (1) sn74lvc4245a octal bus transceiver and 3.3-v to 5-v shifter with 3-state outputs scas375h ? march 1994 ? revised march 2005 over operating free-air temperature range for v ccb = 2.7 v to 3.6 v (unless otherwise noted) min max unit v ccb supply voltage range ?0.5 4.6 v v i input voltage range b port (2) ?0.5 v ccb + 0.5 v v o output voltage range b port (2) ?0.5 v ccb + 0.5 v i ik input clamp current v i < 0 ?50 ma i ok output clamp current v o < 0 ?50 ma i o continuous output current 50 ma continuous current through v ccb or gnd 100 ma db package 63 q ja package thermal impedance (3) dw package 46 c/w pw package 88 t stg storage temperature range ?65 150 c (1) stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) this value is limited to 4.6 v maximum. (3) the package thermal impedance is calculated in accordance with jesd 51-7. for v cca = 4.5 v to 5.5 v min max unit v cca supply voltage 4.5 5.5 v v ih high-level input voltage 2 v v il low-level input voltage 0.8 v v ia input voltage 0 v cca v v oa output voltage 0 v cca v i oh high-level output current ?24 ma i ol low-level output current 24 ma t a operating free-air temperature ?40 85 c (1) all unused inputs of the device must be held at the associated v cc or gnd to ensure proper device operation. refer to the ti application report, implications of slow or floating cmos inputs, literature number scba004. for v ccb = 2.7 v to 3.6 v min max unit v ccb supply voltage 2.7 3.6 v v ih high-level input voltage v ccb = 2.7 v to 3.6 v 2 v v il low-level input voltage v ccb = 2.7 v to 3.6 v 0.8 v v ib input voltage 0 v ccb v v ob output voltage 0 v ccb v v ccb = 2.7 v ?12 i oh high-level output current ma v ccb = 3 v ?24 v ccb = 2.7 v 12 i ol low-level output current ma v ccb = 3 v 24 t a operating free-air temperature ?40 85 c (1) all unused inputs of the device must be held at the associated v cc or gnd to ensure proper device operation. refer to the ti application report, implications of slow or floating cmos inputs, literature number scba004. 3 www .ti.com
electrical characteristics (1) electrical characteristics (1) sn74lvc4245a octal bus transceiver and 3.3-v to 5-v shifter with 3-state outputs scas375h ? march 1994 ? revised march 2005 over recommended operating free-air temperature range for v cca = 4.5 v to 5.5 v (unless otherwise noted) parameter test conditions v cca min typ (2) max unit 4.5 v 4.3 i oh = ?100 m a 5.5 v 5.3 v oh v 4.5 v 3.7 i oh = ?24 ma 5.5 v 4.7 4.5 v 0.2 i ol = 100 m a 5.5 v 0.2 v ol v 4.5 v 0.55 i ol = 24 ma 5.5 v 0.55 i i control inputs v i = v cca or gnd 5.5 v 1 m a i oz (3) a port v o = v cca or gnd 5.5 v 5 m a i cca v i = v cca or gnd, i o = 0 5.5 v 80 m a d i cca (4) one input at 3.4 v, other inputs at v cca or gnd 5.5 v 1.5 ma c i control inputs v i = v cca or gnd open 5 pf c io a port v o = v cca or gnd 5 v 11 pf (1) v ccb = 2.7 v to 3.6 v (2) all typical values are measured at v cc = 5 v, t a = 25 c. (3) for i/o ports, the parameter i oz includes the input leakage current. (4) this is the increase in supply current for each input that is at one of the specified ttl voltage levels, rather than 0 v or the associated v cc . over recommended operating free-air temperature range for v ccb = 2.7 v to 3.6 v (unless otherwise noted) parameter test conditions v ccb min typ (2) max unit i oh = ?100 m a 2.7 v to 3.6 v v cc ? 0.2 2.7 v 2.2 v oh i oh = ?12 ma v 3 v 2.4 i oh = ?24 ma 3 v 2 i ol = 100 m a 2.7 v to 3.6 v 0.2 v ol i ol = 12 ma 2.7 v 0.4 v i ol = 24 ma 3 v 0.55 i oz (3) b port v o = v ccb or gnd 3.6 v 5 m a i ccb v i = v ccb or gnd, i o = 0 3.6 v 50 m a d i ccb (4) one input at v ccb ? 0.6 v, other inputs at v ccb or gnd 2.7 v to 3.6 v 0.5 ma c io b port v o = v ccb or gnd 3.3 v 11 pf (1) v cca = 5 v 0.5 v (2) all typical values are measured at v cc = 3.3 v, t a = 25 c. (3) for i/o ports, the parameter i oz includes the input leakage current. (4) this is the increase in supply current for each input that is at one of the specified ttl voltage levels, rather than 0 v or the associated v cc . 4 www .ti.com
switching characteristics operating characteristics power-up considerations (1) sn74lvc4245a octal bus transceiver and 3.3-v to 5-v shifter with 3-state outputs scas375h ? march 1994 ? revised march 2005 over recommended operating free-air temperature range, c l = 50 pf (unless otherwise noted) (see figure 1 and figure 2 ) v cca = 5 v 0.5 v, from to v ccb = 2.7 v to 3.6 v parameter unit (input) (output) min max t phl 1 6.3 a b ns t plh 1 6.7 t phl 1 6.1 b a ns t plh 1 5 t pzl 1 9 oe a ns t pzh 1 8.1 t pzl 1 8.8 oe b ns t pzh 1 9.8 t plz 1 7 oe a ns t phz 1 5.8 t plz 1 7.7 oe b ns t phz 1 7.8 v cca = 4.5 v to 5.5 v, v ccb = 2.7 v to 3.6 v, t a = 25 c parameter test conditions typ unit outputs enabled 39.5 c pd power dissipation capacitance per transceiver c l = 0, f = 10 mhz pf outputs disabled 5 ti level-translation devices offer an opportunity for successful mixed-voltage signal design. a proper power-up sequence always should be followed to avoid excessive supply current, bus contention, oscillations, or other anomalies caused by improperly biased device pins. take these precautions to guard against such power-up problems: 1. connect ground before any supply voltage is applied. 2. power up the control side of the device (v cca for all four of these devices). 3. tie oe to v cca with a pullup resistor so that it ramps with v cca . 4. depending on the direction of the data path, dir can be high or low. if dir high is needed (a data to b bus), ramp it with v cca . otherwise, keep dir low. (1) refer to the ti application report, texas instruments voltage-level-translation devices, literature number scea021. 5 www .ti.com
parameter measurement information sn74lvc4245a octal bus transceiver and 3.3-v to 5-v shifter with 3-state outputs scas375h ? march 1994 ? revised march 2005 a port figure 1. load circuit and voltage waveforms 6 www .ti.com from output under t est c l = 50 pf (see note a) load circuit s1 2 v c c open gnd 500 w 500 w vol t age w a veforms prop aga tion dela y times noninverting outputs t p l h t p h l v o h v o l output control output w aveform 1 s1 at 2 v c c (see note b) output w aveform 2 s1 at gnd (see note b) v o l v o h t p z l t p z h t p l z t p h z 1.5 v 1.5 v v c c 0 v v o l + 0.3 v v o h - 0.3 v 0 v 3 v vol t age w a veforms enable and disable times low - and high-level enabling output t p l h /t p h l t p l z /t p z l t p h z /t p z h open 2 v c c gnd test s1 notes: a. c l includes probe and jig capacitance. b. w aveform 1 is for an output with internal conditions such that the output is low , except when disabled by the output control. w aveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. c. all input pulses are supplied by generators having the following characteristics: prr 10 mhz, z o = 50 w , t r 2.5 ns, t f 2.5 ns. d. the outputs are measured one at a time, with one transition per measurement. e. all parameters and waveforms are not applicable to all devices. v c c 0 v 1.5 v input 50% v c c 50% v c c 50% v c c 1.5 v 50% v c c v c c 0 v 1.5 v 1.5 v t w input vol t age w a veforms pulse dura tion
parameter measurement information sn74lvc4245a octal bus transceiver and 3.3-v to 5-v shifter with 3-state outputs scas375h ? march 1994 ? revised march 2005 b port figure 2. load circuit and voltage waveforms 7 www .ti.com from output under t est c l = 50 pf (see note a) load circuit s1 7 v open gnd 500 w 500 w vol t age w a veforms prop aga tion dela y times noninverting outputs t p l h t p h l v o h v o l output control output w aveform 1 s1 at 7 v (see note b) output w aveform 2 s1 at gnd (see note b) v o l v o h t p z l t p z h t p l z t p h z 1.5 v 1.5 v 3.5 v 0 v v o l + 0.3 v v o h - 0.3 v 0 v 3 v vol t age w a veforms enable and disable times low - and high-level enabling output t p l h /t p h l t p l z /t p z l t p h z /t p z h open 7 v gnd test s1 notes: a. c l includes probe and jig capacitance. b. w aveform 1 is for an output with internal conditions such that the output is low , except when disabled by the output control. w aveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. c. all input pulses are supplied by generators having the following characteristics: prr 10 mhz, z o = 50 w , t r 2.5 ns, t f 2.5 ns. d. the outputs are measured one at a time, with one transition per measurement. e. all parameters and waveforms are not applicable to all devices. 3 v0 v 1.5 v input 1.5 v 1.5 v 1.5 v 1.5 v1.5 v 3 v0 v 1.5 v 1.5 v t w input vol t age w a veforms pulse dura tion
packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) sn74lvc4245adbr active ssop db 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245adbre4 active ssop db 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74LVC4245ADBRG4 active ssop db 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245adw active soic dw 24 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245adwe4 active soic dw 24 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245adwg4 active soic dw 24 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245adwr active soic dw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245adwre4 active soic dw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245adwrg4 active soic dw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apw active tssop pw 24 60 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwe4 active tssop pw 24 60 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwg4 active tssop pw 24 60 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwr active tssop pw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwre4 active tssop pw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwrg4 active tssop pw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwt active tssop pw 24 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwte4 active tssop pw 24 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74lvc4245apwtg4 active tssop pw 24 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package option addendum www.ti.com 18-sep-2008 addendum-page 1
package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. -- the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis. other qualified versions of sn74lvc4245a : ? enhanced product: sn74lvc4245a-ep note: qualified version definitions: ? enhanced product - supports defense, aerospace and medical applications package option addendum www.ti.com 18-sep-2008 addendum-page 2
tape and reel information *all dimensions are nominal device package type package drawing pins spq reel diameter (mm) reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant sn74lvc4245adbr ssop db 24 2000 330.0 16.4 8.2 8.8 2.5 12.0 16.0 q1 sn74lvc4245adwr soic dw 24 2000 330.0 24.4 10.75 15.7 2.7 12.0 24.0 q1 sn74lvc4245apwr tssop pw 24 2000 330.0 16.4 6.95 8.3 1.6 8.0 16.0 q1 package materials information www.ti.com 11-mar-2008 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) sn74lvc4245adbr ssop db 24 2000 346.0 346.0 33.0 sn74lvc4245adwr soic dw 24 2000 346.0 346.0 41.0 sn74lvc4245apwr tssop pw 24 2000 346.0 346.0 33.0 package materials information www.ti.com 11-mar-2008 pack materials-page 2
mechanical data msso002e ? january 1995 ? revised december 2001 post office box 655303 ? dallas, texas 75265 db (r-pdso-g**) plastic small-outline 4040065 /e 12/01 28 pins shown gage plane 8,20 7,40 0,55 0,95 0,25 38 12,90 12,30 28 10,50 24 8,50 seating plane 9,90 7,90 30 10,50 9,90 0,38 5,60 5,00 15 0,22 14 a 28 1 20 16 6,50 6,50 14 0,05 min 5,90 5,90 dim a max a min pins ** 2,00 max 6,90 7,50 0,65 m 0,15 0 ? 8 0,10 0,09 0,25 notes: a. all linear dimensions are in millimeters. b. this drawing is subject to change without notice. c. body dimensions do not include mold flash or protrusion not to exceed 0,15. d. falls within jedec mo-150
mechanical data mtss001c january 1995 revised february 1999 post office box 655303 ? dallas, texas 75265 pw (r-pdso-g**) plastic small-outline package 14 pins shown 0,65 m 0,10 0,10 0,25 0,50 0,75 0,15 nom gage plane 28 9,80 9,60 24 7,90 7,70 20 16 6,60 6,40 4040064/f 01/97 0,30 6,60 6,20 8 0,19 4,30 4,50 7 0,15 14 a 1 1,20 max 14 5,10 4,90 8 3,10 2,90 a max a min dim pins ** 0,05 4,90 5,10 seating plane 0 8 notes: a. all linear dimensions are in millimeters. b. this drawing is subject to change without notice. c. body dimensions do not include mold flash or protrusion not to exceed 0,15. d. falls within jedec mo-153

important notice texas instruments incorporated and its subsidiaries (ti) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. all products are sold subject to ti?s terms and conditions of sale supplied at the time of order acknowledgment. ti warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with ti?s standard warranty. testing and other quality control techniques are used to the extent ti deems necessary to support this warranty. except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. ti assumes no liability for applications assistance or customer product design. customers are responsible for their products and applications using ti components. to minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. ti does not warrant or represent that any license, either express or implied, is granted under any ti patent right, copyright, mask work right, or other ti intellectual property right relating to any combination, machine, or process in which ti products or services are used. information published by ti regarding third-party products or services does not constitute a license from ti to use such products or services or a warranty or endorsement thereof. use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from ti under the patents or other intellectual property of ti. reproduction of ti information in ti data books or data sheets is permissible only if reproduction is without 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in the safety and regulatory ramifications of their applications, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of ti products in such safety-critical applications, notwithstanding any applications-related information or support that may be provided by ti. further, buyers must fully indemnify ti and its representatives against any damages arising out of the use of ti products in such safety-critical applications. ti products are neither designed nor intended for use in military/aerospace applications or environments unless the ti products are specifically designated by ti as military-grade or "enhanced plastic." only products designated by ti as military-grade meet military specifications. buyers acknowledge and agree that any such use of ti products which ti has not designated as military-grade is solely at the buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. ti products are neither designed nor intended for use in automotive applications or environments unless the specific ti products are designated by ti as compliant with iso/ts 16949 requirements. buyers acknowledge and agree that, if they use any non-designated products in automotive applications, ti will not be responsible for any failure to meet such requirements. following are urls where you can obtain information on other texas instruments products and application solutions: products applications amplifiers amplifier.ti.com audio www.ti.com/audio data converters dataconverter.ti.com automotive www.ti.com/automotive dsp dsp.ti.com broadband www.ti.com/broadband clocks and timers www.ti.com/clocks digital control www.ti.com/digitalcontrol interface interface.ti.com medical www.ti.com/medical logic logic.ti.com military www.ti.com/military power mgmt power.ti.com optical networking www.ti.com/opticalnetwork microcontrollers microcontroller.ti.com security www.ti.com/security rfid www.ti-rfid.com telephony www.ti.com/telephony rf/if and zigbee? solutions www.ti.com/lprf video & imaging www.ti.com/video wireless www.ti.com/wireless mailing address: texas instruments, post office box 655303, dallas, texas 75265 copyright ? 2008, texas instruments incorporated

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