sdas137a ? december 1983 ? revised december 1994 copyright ? 1994, texas instruments incorporated 1 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 ? 4-line to 1-line multiplexers that can select 1-of-16 data inputs ? applications: boolean function generator parallel-to-serial converter data source selector ? buffered 3-state bus driver inputs permit multiplexing from n lines to one line ? package options include plastic small-outline (dw) packages, ceramic chip carriers (fk), and standard plastic (nt) and ceramic (jt) 300-mil dips description the as250a devices provide full binary decoding to select 1-of-16 data inputs or use sources as an input with an inverting w output. the selected sources are buffered with symmetrical propagation delay times. this reduces the possibility of transients occurring at the output. a buffered output-enable (oe ) input can be used for n-line to 1-line cascading. taking oe high places the output in the high-impedance state. in the high-impedance state, the output neither loads nor drives the bus lines significantly. oe does not affect the internal operations of the data selector/multiplexer. new data can be set up while the outputs are disabled. the sn54as250a is characterized for operation over the full military temperature range of ? 55 c to 125 c. the sn74as250a is characterized for operation from 0 c to 70 c. sn54as250a ...jt p ackage sn74as250a . . . dw or nt package (top view) sn54as250a . . . fk package (top view) 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 e7 e6 e5 e4 e3 e2 e1 e0 oe w d gnd v cc e8 e9 e10 e11 e12 e13 e14 e15 a b c 321 13 14 5 6 7 8 9 10 11 e10 e11 e12 nc e13 e14 e15 e4 e3 e2 nc e1 e0 oe 4 15 16 17 18 d gnd nc c b a e5 e6 e7 nc 28 27 26 25 24 23 22 21 20 19 12 w v e8 e9 cc nc ? no internal connection
en 9 mux 0 15 a 14 b 13 c 3 11 d 8 e0 7 e1 6 e2 5 e3 4 e4 3 e5 2 e6 1 e7 23 e8 22 e9 21 e10 g 0 15 10 20 e11 19 e12 18 e13 17 e14 16 e15 oe w logic symbol ? ? this symbol is in accordance with ansi/ieee std 91-1984 and iec publication 617-12. pin numbers shown are for the dw, jt, and nt packages. sdas137a ? december 1983 ? revised december 1994 2 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 function table inputs output oe a b c d ei output w l l l l l e0 e 0 l h llle1 e 1 l l hlle2 e 2 l h hlle3 e 3 l l lhle4 e 4 l h lhle5 e 5 l l hhle6 e 6 l h hhle7 e 7 l l llhe8 e 8 l h llhe9 e 9 l l h l h e10 e 10 l h hlhe11 e 11 l l l h h e12 e 12 l h l h h e13 e 13 l l h h h e14 e 14 l h h h h e15 e 15 h x x x x x z
sdas137a ? december 1983 ? revised december 1994 3 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 logic diagram (positive logic) e7 e8 e0 e1 e2 e3 e4 e5 e6 e9 e10 e11 e12 e13 e14 e15 a b c d oe w data inputs data selects 8 7 6 5 4 3 2 1 23 22 21 20 19 18 17 16 15 14 13 11 10 a b c d a b c d pin numbers shown are for the dw, jt, and nt packages.
sdas137a ? december 1983 ? revised december 1994 4 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) ? supply voltage, v cc 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage, v i 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating free-air temperature range, t a : sn54as250a ?55 c to 125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sn74as250a 0 c to 70 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range ?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. recommended operating conditions sn54as250a sn74as250a 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 2 2 v v il low-level input voltage 0.8 0.8 v i oh high-level output current ?12 ?15 ma i ol low-level output current 32 48 ma t a operating free-air temperature ?55 125 0 70 c electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) parameter test conditions sn54as250a sn74as250a unit parameter test conditions min typ ? max min typ ? max unit v ik v cc = 4.5 v, i i = ? 18 ma ?1.2 ?1.2 v v cc = 4.5 v to 5.5 v, i oh = ? 2 ma v cc ?2 v cc ?2 v oh v cc = 4.5 v i oh = ? 12 ma 2.4 3.3 v v oh v cc = 4.5 v i oh = ? 15 ma 2.4 3.3 v v ol v cc = 4.5 v i ol = 32 ma 0.35 0.5 v v ol v cc = 4.5 v i ol = 48 ma 0.35 0.5 v i ozh v cc = 5.5 v, v o = 2.7 v 50 50 a i ozl v cc = 5.5 v, v o = 0.4 v ?50 ?50 a i i v cc = 5.5 v, v i = 7 v 0.1 0.1 ma i ih v cc = 5.5 v, v i = 2.7 v 20 20 a i il v cc = 5.5 v, v i = 0.4 v ?0.5 ?0.5 ma i o v cc = 5.5 v, v o = 2.25 v ?30 ?112 ?30 ?112 ma outputs high 26 42 26 42 i cc v cc = 5.5 v outputs low 31 50 31 50 ma i cc v cc = 5.5 v outputs disabled 30 48 30 48 ma ? all typical values are at v cc = 5 v, t a = 25 c. the output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, i os .
sdas137a ? december 1983 ? revised december 1994 5 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 switching characteristics (see figure 1) parameter from (input) to (output) v cc = 4.5 v to 5.5 v, c l = 50 pf, r1 = 500 ? , r2 = 500 ? , t a = min to max ? unit (input) (output) sn54as250a sn74as250a min max min max t plh data w 2 9.5 2 8 ns t phl data w 2 8.5 2 7 ns t plh a, b, c, d w 4 15.5 4 13 ns t phl a, b, c, d w 4 12 4 10.5 ns t pzh oe w 2 7.5 2 7 ns t pzl oe w 2 10 2 9 ns t phz oe w 1.5 6.5 1.5 6 ns t plz oe w 2 8.5 2 6.5 ns ? for conditions shown as min or max, use the appropriate value specified under recommended operating conditions.
sdas137a ? december 1983 ? revised december 1994 6 post office box 655303 ? dallas, texas 75265 post office box 1443 ? houston, texas 77251?1443 parameter measurement information series 54als/74als and 54as/74as devices t phz t plz t phl t plh 0.3 v t pzl t pzh t plh t phl load circuit for 3-state outputs from output under test test point r1 s1 c l (see note a) 7 v 1.3 v 1.3 v 1.3 v 3.5 v 3.5 v 0.3 v 0.3 v t h t su voltage waveforms setup and hold times timing input data input 1.3 v 1.3 v 3.5 v 3.5 v 0.3 v 0.3 v high-level pulse low-level pulse t w voltage waveforms pulse durations input out-of-phase output (see note c) 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 1.3 v 3.5 v 3.5 v 0.3 v 0.3 v v ol v oh v oh v ol output control (low-level enabling) waveform 1 s1 closed (see note b) waveform 2 s1 open (see note b) 0 v v oh v ol 3.5 v in-phase output 0.3 v 1.3 v 1.3 v voltage waveforms propagation delay times voltage waveforms enable and disable times, 3-state outputs r2 v cc r l test point from output under test c l (see note a) load circuit for open-collector outputs load circuit for bi-state totem-pole outputs from output under test test point c l (see note a) r l r l = r1 = r2 notes: a. c l includes probe and jig capacitance. b. waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. c. when measuring propagation delay items of 3-state outputs, switch s1 is open. d. all input pulses have the following characteristics: prr 1 mhz, t r = t f = 2 ns, duty cycle = 50%. e. the outputs are measured one at a time with one transition per measurement. figure 1. load circuits and voltage waveforms
package option addendum www.ti.com 31-aug-2014 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples 5962-9056201la active cdip jt 24 1 tbd a42 n / a for pkg type -55 to 125 5962-9056201la SNJ54AS250AJT sn74as250ant obsolete pdip nt 24 tbd call ti call ti 0 to 70 sn74as250ant sn74as250ant3 obsolete pdip nt 24 tbd call ti call ti 0 to 70 SNJ54AS250AJT active cdip jt 24 1 tbd a42 n / a for pkg type -55 to 125 5962-9056201la SNJ54AS250AJT (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. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device. (6) lead/ball finish - orderable devices may have multiple material finish options. finish options are separated by a vertical ruled line. lead/ball finish values may wrap to two lines if the finish value exceeds the maximum column width. 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
package option addendum www.ti.com 31-aug-2014 addendum-page 2 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 sn54as250a, sn74as250a : ? catalog: sn74as250a ? military: sn54as250a note: qualified version definitions: ? catalog - ti's standard catalog product ? military - qml certified for military and defense applications
mechanical data mcer004a january 1995 revised january 1997 post office box 655303 ? dallas, texas 75265 jt (r-gdip-t**) ceramic dual-in-line 24 leads shown 4040110/c 08/96 b 0.200 (5,08) max 0.320 (8,13) 0.290 (7,37) 0.130 (3,30) min 0.008 (0,20) 0.014 (0,36) seating plane 13 12 0.030 (0,76) 0.070 (1,78) 0.015 (0,38) min a 24 1 0.100 (2,54) max 0.023 (0,58) 0.015 (0,38) 0.100 (2,54) 0 15 1.440 (37,08) 1.460 0.285 (7,39) 0.291 (36,58) (7,24) 28 pins ** 1.280 1.240 0.300 0.245 (7,62) dim b max a max a min b min (6,22) 24 (32,51) (31,50) notes: a. all linear dimensions are in inches (millimeters). b. this drawing is subject to change without notice. c. this package can be hermetically sealed with a ceramic lid using glass frit. d. index point is provided on cap for terminal identification. e. falls within mil std 1835 gdip3-t24, gdip4-t28, and jedec mo-058 aa, mo-058 ab
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