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74AC11244 octal buffer/driver with 3-state outputs scas171b march 1987 revised september 1998 1 post office box 655303 ? dallas, texas 75265 epic ? (enhanced-performance implanted cmos ) 1- m m process 3-state outputs drive bus lines or buffer memory address registers flow-through architecture optimizes pcb layout center-pin v cc and gnd pin configurations minimize high-speed switching noise 500-ma typical latch-up immunity at 125 c package options include plastic small-outline (dw), shrink small-outline (db), and thin shrink small-outline (pw) packages, and standard plastic dips (nt) description the 74AC11244 is an octal buffer or line driver designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. the device can be used as two 4-bit buffers or one 8-bit buffer, with active-low output-enable (oe ) inputs. when oe is low, the device passes noninverted data from the a inputs to the y outputs. when oe is high, the outputs are in the high-impedance state. to ensure the high-impedance state during power up or power down, oe should be tied to v cc through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. the 74AC11244 is characterized for operation from 40 c to 85 c. function table (each driver) inputs output oe a y l h h l ll h x z copyright ? 1998, texas instruments incorporated production data information is current as of publication date. products conform to specifications per the terms of texas instruments standard warranty. production processing does not necessarily include testing of all parameters. 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. epic is a trademark of texas instruments incorporated. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 1y1 1y2 1y3 1y4 gnd gnd gnd gnd 2y1 2y2 2y3 2y4 1oe 1a1 1a2 1a3 1a4 v cc v cc 2a1 2a2 2a3 2a4 2oe db, dw, nt, or pw package (top view)
74AC11244 octal buffer/driver with 3-state outputs scas171b march 1987 revised september 1998 2 post office box 655303 ? dallas, texas 75265 logic symbol 2 1oe 23 1a1 22 1a2 21 1a3 20 1a4 en 24 1y1 1 1y2 2 1y3 3 1y4 4 2oe 17 2a1 16 2a2 15 2a3 14 2a4 en 13 2y1 9 2y2 10 2y3 11 2y4 12 2 this symbol is in accordance with ansi/ieee std 91-1984 and iec publication 617-12. logic diagram (positive logic) 24 23 22 21 20 13 17 16 15 14 12 11 10 9 4 3 2 1 1a1 1a2 1a3 1a4 1y1 2a1 2a2 2a3 2a4 2y1 1y2 1y3 1y4 2y2 2y3 2y4 1oe 2oe absolute maximum ratings over operating free-air temperature range (unless otherwise noted) 3 supply voltage range, v cc 0.5 v to 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage range, v i (see note 1) 0.5 v to v cc + 0.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . output voltage range, v o (see note 1) 0.5 v to v cc + 0.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input clamp current, i ik (v i < 0 or v i > v cc ) 20 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . output clamp current, i ok (v o < 0 or v o > v cc ) 50 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous output current, i o (v o = 0 to v cc ) 50 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous current through v cc or gnd 200 ma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . package thermal impedance, q ja (see note 2): db package 104 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . dw package 81 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pw package 120 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . nt package 67 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg 65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 stresses beyond those listed under aabsolute maximum ratingso may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated under arecommended operating conditi onso 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, except for through-hole packages, which use a trace length of zero.
74AC11244 octal buffer/driver with 3-state outputs scas171b march 1987 revised september 1998 3 post office box 655303 ? dallas, texas 75265 recommended operating conditions (see note 3) min nom max unit v cc supply voltage 3 5 5.5 v v cc = 3 v 2.1 v ih high-level input voltage v cc = 4.5 v 3.15 v v cc = 5.5 v 3.85 v cc = 3 v 0.9 v il low-level input voltage v cc = 4.5 v 1.35 v v cc = 5.5 v 1.65 v i input voltage 0 v cc v v o output voltage 0 v cc v v cc = 3 v 4 i oh high-level output current v cc = 4.5 v 24 ma v cc = 5.5 v 24 v cc = 3 v 12 i ol low-level output current v cc = 4.5 v 24 ma v cc = 5.5 v 24 d t/ d v input transition rise or fall rate 0 10 ns/v t a operating free-air temperature 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 min max unit parameter test conditions v cc min typ max min max unit 3 v 2.9 2.9 i oh = 50 m a 4.5 v 4.4 4.4 5.5 v 5.4 5.4 v oh i oh = 4 ma 3 v 2.58 2.48 v i24a 4.5 v 3.94 3.8 i ol = 24 ma 5.5 v 4.94 4.8 i oh = 75 ma 2 5.5 v 3.85 3 v 0.1 0.1 i ol = 50 m a 4.5 v 0.1 0.1 5.5 v 0.1 0.1 v ol i ol = 12 ma 3 v 0.36 0.44 v i ol =24ma 4.5 v 0.36 0.44 i ol = 24 ma 5.5 v 0.36 0.44 i ol = 75 ma 2 5.5 v 1.65 i i v i = v cc or gnd 5.5 v 0.1 1 m a i oz v o = v cc or gnd 5.5 v 0.5 5 m a i cc v i = v cc or gnd, i o = 0 5.5 v 8 80 m a c i v i = v cc or gnd 5 v 4 pf c o v o = v cc or gnd 5 v 10 pf 2 not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
74AC11244 octal buffer/driver with 3-state outputs scas171b march 1987 revised september 1998 4 post office box 655303 ? dallas, texas 75265 switching characteristics over recommended operating free-air temperature range, v cc = 3.3 v 0.3 v (unless otherwise noted) (see figure 1) parameter from to t a = 25 c min max unit parameter (input) (output) min typ max min max unit t plh a y 1.5 7.1 9.3 1.5 10.2 ns t phl a y 1.5 6.3 8.6 1.5 9.5 ns t pzh oe y 1.5 8 10.7 1.5 11.8 ns t pzl oe y 1.5 7.9 10.6 1.5 11.9 ns t phz oe y 1.5 5.9 7.9 1.5 8.3 ns t plz oe y 1.5 7.2 9.4 1.5 9.9 ns switching characteristics over recommended operating free-air temperature range, v cc = 5 v 0.5 v (unless otherwise noted) (see figure 1) parameter from to t a = 25 c min max unit parameter (input) (output) min typ max min max unit t plh a y 1.5 4.9 6.7 1.5 7.3 ns t phl a y 1.5 4.5 6.4 1.5 6.9 ns t pzh oe y 1.5 5.4 7.7 1.5 8.5 ns t pzl oe y 1.5 5.4 7.6 1.5 8.5 ns t phz oe y 1.5 5.2 7 1.5 7.3 ns t plz oe y 1.5 5.8 7.8 1.5 8.2 ns operating characteristics, v cc = 5 v, t a = 25 c parameter test conditions typ unit c d power dissi p ation ca p acitance p er buffer/driver outputs enabled c l =50 p f f=1mhz 27 p f c pd po w er dissipation capacitance per b u ffer/dri v er outputs disabled c l = 50 pf , f = 1 mh z 9 pf
74AC11244 octal buffer/driver with 3-state outputs scas171b march 1987 revised september 1998 5 post office box 655303 ? dallas, texas 75265 parameter measurement information from output under test c l = 50 pf (see note a) load circuit s1 2 v cc 500 w 500 w t plh t phl output control (low-level enabling) output waveform 1 s1 at 2 v cc (see note b) output waveform 2 s1 at gnd (see note b) v ol v oh t pzl t pzh t plz t phz 50% 50% 50% 50% v cc v cc 0 v 50% v cc 50% v cc v oh v ol 0 v 50% v cc 20% v cc 50% v cc 80% v cc 0 v v cc gnd open input output voltage waveforms voltage waveforms t plh /t phl t plz /t pzl t phz /t pzh open 2 v cc gnd test s1 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. all input pulses are supplied by generators having the following characteristics: prr 1 mhz, z o = 50 w , t r = 3 ns, t f = 3 ns. d. the outputs are measured one at a time with one input transition per measurement. figure 1. load circuit and voltage waveforms
package option addendum www.ti.com 15-oct-2015 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 74AC11244dble obsolete ssop db 24 tbd call ti call ti -40 to 85 74AC11244dbr active ssop db 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim -40 to 85 ae244 74AC11244dw active soic dw 24 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim -40 to 85 ac11244 74AC11244dwg4 active soic dw 24 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim -40 to 85 ac11244 74AC11244dwr active soic dw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim -40 to 85 ac11244 74AC11244pw active tssop pw 24 60 green (rohs & no sb/br) cu nipdau level-1-260c-unlim -40 to 85 ae244 74AC11244pwle obsolete tssop pw 24 tbd call ti call ti -40 to 85 74AC11244pwr active tssop pw 24 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim -40 to 85 ae244 (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.
package option addendum www.ti.com 15-oct-2015 addendum-page 2 (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 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.
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 74AC11244dbr ssop db 24 2000 330.0 16.4 8.2 8.8 2.5 12.0 16.0 q1 74AC11244dwr soic dw 24 2000 330.0 24.4 10.75 15.7 2.7 12.0 24.0 q1 74AC11244pwr 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 26-jan-2013 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) 74AC11244dbr ssop db 24 2000 367.0 367.0 38.0 74AC11244dwr soic dw 24 2000 367.0 367.0 45.0 74AC11244pwr tssop pw 24 2000 367.0 367.0 38.0 package materials information www.ti.com 26-jan-2013 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
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