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scls071d ? november 1988 ? revised october 2003 1 post office box 655303 ? dallas, texas 75265 operating voltage range of 4.5 v to 5.5 v high-current outputs drive up to 15 lsttl loads typical t pd = 15 ns low power consumption, 80- a max i cc 6-ma output drive at 5 v low input current of 1 a max inputs are ttl-voltage compatible buffered inputs and outputs 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 a /b 1a 1b 1y 2a 2b 2y gnd v cc g 4a 4b 4y 3a 3b 3y sn54hct157 ...j or w p ackage sn74hct157 ...d or n p ackage (top view) 3212019 910111213 4 5 6 7 8 18 17 16 15 14 4a 4b nc 4y 3a 1b 1y nc 2a 2b 1a a/b nc 3y 3b v g 2y gnd nc sn54hct157 . . . fk package (top view) cc nc ? no internal connection description/ordering information these data selectors/multiplexers contain inverters and drivers to supply full data selection to the four output gates. a separate strobe (g ) input is provided. a 4-bit word is selected from one of two sources and is routed to the four outputs. ordering information t a package ? orderable part number top-side marking pdip ? n tube of 25 sn74hct157n sn74hct157n ?40 c to 85 c tube of 40 sn74hct157d ?40 c to 85 c soic ? d reel of 2500 sn74hct157dr hct157 soic ? d reel of 250 sn74hct157dt hct157 cdip ? j tube of 25 snj54hct157j snj54hct157j ?55 c to 125 c cfp ? w tube of 150 snj54hct157w snj54hct157w ?55 c to 125 c lccc ? fk tube of 55 snj54hct157fk snj54hct157fk ? package drawings, standard packing quantities, thermal data, symbolization, and pcb design guidelines are available at www.ti.com/sc/package. copyright ? 2003, texas instruments incorporated please be aware that an important notice concerning avail ability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
scls071d ? november 1988 ? revised october 2003 2 post office box 655303 ? dallas, texas 75265 function table inputs output strobe select data output y strobe g select a /b a b y h x x x l l l l xl l l h xh l h x ll l h x h h logic diagram (positive logic) pin numbers shown are for the d, j, n, and w packages. 2 3 5 6 11 10 14 13 15 1 g a /b 4b 4a 3b 3a 2b 2a 1b 1a 4 7 9 12 1y 2y 3y 4y
scls071d ? november 1988 ? revised october 2003 3 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) ? supply voltage range, v cc ?0.5 v to 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input clamp current, i ik (v i < 0 or v i > v cc ) (see note 1) 20 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . output clamp current, i ok (v o < 0 or v o > v cc ) (see note 1) 20 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous output current, i o (v o = 0 to v cc ) 35 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous current through v cc or gnd 70 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . package thermal impedance, ja (see note 2): d package 73 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . n package 67 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ?65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, a nd functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating conditi ons? is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. notes: 1. the input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. the package thermal impedance is calculated in accordance with jesd 51-7. recommended operating conditions (see note 3) sn54hct157 sn74hct157 unit min nom max min nom max unit v cc supply voltage 4.5 5 5.5 4.5 5 5.5 v v ih high-level input voltage v cc = 4.5 v to 5.5 v 2 2 v v il low-level input voltage v cc = 4.5 v to 5.5 v 0.8 0.8 v v i input voltage 0 v cc 0 v cc v v o output voltage 0 v cc 0 v cc v t t input transition (rise and fall) time 500 500 ns t a operating free-air temperature ?55 125 ?40 85 c note 3: all unused inputs of the device must be held at 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. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) parameter test conditions v cc t a = 25 c sn54hct157 sn74hct157 unit parameter test conditions v cc min typ max min max min max unit v oh v i = v ih or v il i oh = ?20 a 4.5 v 4.4 4.499 4.4 4.4 v v oh v i = v ih or v il i oh = ?6 ma 4.5 v 3.98 4.3 3.7 3.84 v v ol v i = v ih or v il i ol = 20 a 4.5 v 0.001 0.1 0.1 0.1 v v ol v i = v ih or v il i ol = 6 ma 4.5 v 0.17 0.26 0.4 0.33 v i i v i = v cc or 0 5.5 v 0.1 100 1000 1000 na i cc v i = v cc or 0, i o = 0 5.5 v 8 160 80 a ? i cc ? one input at 0.5 v or 2.4 v, other inputs at 0 or v cc 5.5 v 1.4 2.4 3 2.9 ma c i 4.5 v to 5.5 v 3 10 10* 10 pf * on products compliant to mil-prf-38535, this parameter is not production tested. ? 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 v cc .
scls071d ? november 1988 ? revised october 2003 4 post office box 655303 ? dallas, texas 75265 switching characteristics over recommended operating free-air temperature range, c l = 50 pf (unless otherwise noted) (see figure 1) parameter from to v cc t a = 25 c sn54hct157 sn74hct157 unit parameter from (input) to (output) v cc min typ max min max min max unit a or b y 4.5 v 18 28 42 35 a or b y 5.5 v 15 25 38 32 t pd a /b y 4.5 v 20 32 48 40 ns t pd a /b y 5.5 v 17 29 43 36 ns g y 4.5 v 18 26 39 33 g y 5.5 v 15 23 35 30 t t any 4.5 v 8 15 22 19 ns t t any 5.5 v 7 14 21 17 ns switching characteristics over recommended operating free-air temperature range, c l = 150 pf (unless otherwise noted) (see figure 1) parameter from to v cc t a = 25 c sn54hct157 sn74hct157 unit parameter from (input) to (output) v cc min typ max min max min max unit a or b y 4.5 v 23 42 63 52 a or b y 5.5 v 19 38 52 46 t pd a /b y 4.5 v 24 46 72 58 ns t pd a /b y 5.5 v 21 41 61 52 ns g y 4.5 v 21 39 58 48 g y 5.5 v 19 35 49 43 t t any 4.5 v 17 42 63 53 ns t t any 5.5 v 14 38 57 48 ns operating characteristics, t a = 25 c parameter test conditions typ unit c pd power dissipation capacitance no load 12 pf
scls071d ? november 1988 ? revised october 2003 5 post office box 655303 ? dallas, texas 75265 parameter measurement information voltage waveforms propagation delay times 1.3 v 1.3 v 1.3 v 10% 10% 90% 90% 3 v v oh v ol 0 v t r t f input (see note b) output 1.3 v t plh t phl test point from output under test load circuit notes: a. c l includes probe and test-fixture capacitance. b. phase relationships between waveforms were chosen arbitrarily. all input pulses are supplied by generators having the followi ng characteristics: prr 1 mhz, z o = 50 ? , t r = 6 ns, t f = 6 ns. c. the outputs are measured one at a time with one input transition per measurement. d. t plh and t phl are the same as t pd . c l = 50 pf (see note a) figure 1. load circuit and voltage waveforms
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 information in ti data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. reproduction of this information with alteration is an unfair and deceptive business practice. ti is not responsible or liable for such altered documentation. resale of ti products or services with statements different from or beyond the parameters stated by ti for that product or service voids all express and any implied warranties for the associated ti product or service and is an unfair and deceptive business practice. ti is not responsible or liable for any such statements. ti products are not authorized for use in safety-critical applications (such as life support) where a failure of the ti product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. buyers represent that they have all necessary expertise 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 interface interface.ti.com digital control www.ti.com/digitalcontrol 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 low power www.ti.com/lpw telephony www.ti.com/telephony wireless video & imaging www.ti.com/video wireless www.ti.com/wireless mailing address: texas instruments, post office box 655303, dallas, texas 75265 copyright ? 2007, texas instruments incorporated
packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) sn74hct157d active soic d 16 40 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157de4 active soic d 16 40 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157dg4 active soic d 16 40 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157dr active soic d 16 2500 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157dre4 active soic d 16 2500 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157drg4 active soic d 16 2500 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157dt active soic d 16 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157dte4 active soic d 16 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157dtg4 active soic d 16 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74hct157n active pdip n 16 25 pb-free (rohs) cu nipdau n / a for pkg type SN74HCT157NE4 active pdip n 16 25 pb-free (rohs) cu nipdau n / a for pkg type (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, 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 package option addendum www.ti.com 23-apr-2007 addendum-page 1
to customer on an annual basis. package option addendum www.ti.com 23-apr-2007 addendum-page 2
tape and reel information package materials information www.ti.com 4-jun-2007 pack materials-page 1
device package pins site reel diameter (mm) reel width (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant sn74hct157dr d 16 fmx 330 16 6.5 10.3 12.1 2 16 q1 tape and reel box information device package pins site length (mm) width (mm) height (mm) sn74hct157dr d 16 fmx 342.9 336.6 28.58 package materials information www.ti.com 4-jun-2007 pack materials-page 2

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 alteration and is accompanied by all associated warranties, conditions, limitations, and notices. reproduction of this information with alteration is an unfair and deceptive business practice. ti is not responsible or liable for such altered documentation. information of third parties may be subject to additional restrictions. resale of ti products or services with statements different from or beyond the parameters stated by ti for that product or service voids all express and any implied warranties for the associated ti product or service and is an unfair and deceptive business practice. ti is not responsible or liable for any such statements. ti products are not authorized for use in safety-critical applications (such as life support) where a failure of the ti product would reasonably be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing such use. buyers represent that they have all necessary expertise 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 interface interface.ti.com digital control www.ti.com/digitalcontrol 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 low power www.ti.com/lpw video & imaging www.ti.com/video wireless wireless www.ti.com/wireless mailing address: texas instruments, post office box 655303, dallas, texas 75265 copyright ? 2007, texas instruments incorporated

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