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sn54als640b, sn54as640, sn74als640b, sn74as640 octal bus transceivers with 3-state outputs sdas122a december 1983 revised january 1995 copyright ? 1995, texas instruments incorporated 1 post office box 655303 ? dallas, texas 75265 ? bidirectional bus transceivers in high-density 20-pin packages ? inverting logic ? package options include plastic small-outline (dw) packages, ceramic chip carriers (fk), and standard plastic (n) and ceramic (j) 300-mil dips description these octal bus transceivers are designed for asynchronous two-way communication between data buses. these devices transmit data from the a bus to the b bus or from the b bus to the a bus, depending upon the level at the direction-control (dir) input. the output-enable (oe ) input can be used to disable the device so that the buses are effectively isolated. the -1 version of the sn74als640b is identical to the standard version, except that the recommended maximum i ol for the -1 version is increased to 48 ma. there is no -1 version of the sn54als640b. the sn54als640b and sn54as640 are characterized for operation over the full military temperature range of 55 c to 125 c. the sn74als640b and sn74as640 are characterized for operation from 0 c to 70 c. function table inputs operation oe dir operation l l b data to a bus l ha data to b bus h x isolation 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 dir a1 a2 a3 a4 a5 a6 a7 a8 gnd v cc oe b1 b2 b3 b4 b5 b6 b7 b8 sn54als640b, sn54as640 ...j p ackage sn74als640b, sn74as640 . . . dw or n package (top view) 3212019 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 b1 b2 b3 b4 b5 a3 a4 a5 a6 a7 sn54als640b, sn54as640 . . . fk package (top view) a2 a1 dir b7 b6 oe a8 gnd b8 v cc 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.
sn54als640b, sn54as640, sn74als640b, sn74as640 octal bus transceivers with 3-state outputs sdas122a december 1983 revised january 1995 2 post office box 655303 ? dallas, texas 75265 logic symbol 2 logic diagram (positive logic) b2 17 b3 16 b4 15 a5 6 a6 7 a7 8 a8 9 a2 3 a3 4 a4 5 oe a1 2 g3 19 3 en2 [ab] b5 14 b6 13 b7 12 b8 11 b1 18 3 en1 [ba] 1 dir 1 2 a1 b1 19 1 18 2 oe dir to seven other transceivers 2 this symbol is in accordance with ansi/ieee std 91-1984 and iec publication 617-12. absolute maximum ratings over operating free-air temperature range (unless otherwise noted) 3 supply voltage, v cc 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage, v i : all inputs 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i/o ports 5.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating free-air temperature range, t a : sn54als640b 55 c to 125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . sn74als640b 0 c to 70 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range 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. recommended operating conditions sn54als640b sn74als640b 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 0.7 0.8 v i oh high-level output current 12 15 ma i ol low level out p ut current 12 24 ma i ol lo w- le v el o u tp u t c u rrent 48 ma t a operating free-air temperature 55 125 0 70 c applies only to the -1 version and only if v cc is between 4.75 v and 5.25 v
sn54als640b, sn54as640, sn74als640b, sn74as640 octal bus transceivers with 3-state outputs sdas122a december 1983 revised january 1995 3 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) parameter test conditions sn54als640b sn74als640b unit parameter test conditions min typ 2 max min typ 2 max unit v ik v cc = 4.5 v, i i = 18 ma 1.5 1.5 v v cc = 4.5 v to 5.5 v, i oh = 0.4 ma v cc 2 v cc 2 v oh i oh = 3 ma 2.4 3.2 2.4 3.2 v v oh v cc = 4.5 v i oh = 12 ma 2 v i oh = 15 ma 2 i ol = 12 ma 0.25 0.4 0.25 0.4 v ol v cc = 4.5 v i ol = 24 ma 0.35 0.5 v i ol = 48 ma 3 0.35 0.5 i i control inputs v cc =55v v i = 7 v 0.1 0.1 ma i i a or b ports v cc = 5 . 5 v v i = 5.5 v 0.1 0.1 ma i ih control inputs v cc =55v v i =27v 20 20 m a i ih a or b ports v cc = 5 . 5 v , v i = 2 . 7 v 20 20 m a i il control inputs v cc =55v v i =04v 0.1 0.1 ma i il a or b ports v cc = 5 . 5 v , v i = 0 . 4 v 0.1 0.1 ma i o ? v cc = 5.5 v, v o = 2.25 v 20 112 30 112 ma outputs high 19 50 19 45 i cc v cc = 5.5 v outputs low 27 60 27 55 ma outputs disabled 28 55 28 50 2 all typical values are at v cc = 5 v, t a = 25 c. 3 applies only to the -1 version and only if v cc is between 4.75 v and 5.25 v for i/o ports, the parameters i ih and i il include the off-state output current. ? the output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, i os . 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 w , r2 = 500 w , t a = min to max # unit sn54als640b sn74als640b min max min max t plh aorb bora 2 14 2 11 ns t phl a or b b or a 2 13 2 10 ns t pzh oe aorb 4 25 4 21 ns t pzl oe a or b 5 27 5 24 ns t phz oe aorb 2 12 2 10 ns t plz oe a or b 3 20 3 15 ns # for conditions shown as min or max, use the appropriate value specified under recommended operating conditions.
sn54als640b, sn54as640, sn74als640b, sn74as640 octal bus transceivers with 3-state outputs sdas122a december 1983 revised january 1995 4 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) 2 supply voltage, v cc 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage, v i : all inputs 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i/o ports 5.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating free-air temperature range, t a : sn54as640 55 c to 125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sn74as640 0 c to 70 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range 65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 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. recommended operating conditions sn54as640 sn74as640 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 48 64 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 sn54as640 sn74as640 unit parameter test conditions min typ 3 max min typ 3 max unit v ik v cc = 4.5 v, i i = 18 ma 1.2 1.2 v v cc = 4.5 v, i oh = 2 ma v cc 2 v cc = 4.5 v to 5.5 v, i oh = 2 ma v cc 2 v oh i oh = 3 ma 2.4 3.2 2.4 3.2 v v cc = 4.5 v i oh = 12 ma 2.4 i oh = 15 ma 2.4 v ol v cc =45v i ol = 48 ma 0.3 0.55 v v ol v cc = 4 . 5 v i ol = 64 ma 0.35 0.55 v i i control inputs v cc =55v v i = 7 v 0.1 0.1 ma i i a or b ports v cc = 5 . 5 v v i = 5.5 v 0.1 0.1 ma i ih control inputs v cc =55v v i =27v 20 20 m a i ih a or b ports v cc = 5 . 5 v , v i = 2 . 7 v 70 70 m a i il control inputs v cc =55v v i =04v 0.5 0.5 ma i il a or b ports v cc = 5 . 5 v , v i = 0 . 4 v 0.75 0.75 ma i o ? v cc = 5.5 v, v o = 2.25 v 50 150 50 150 ma outputs high 37 58 37 58 i cc v cc = 5.5 v outputs low 78 123 78 123 ma outputs disabled 51 80 51 80 3 all typical values are at v cc = 5 v, t a = 25 c. for i/o ports, the parameters i ih and i il include the off-state output current. ? the output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, i os .
sn54als640b, sn54as640, sn74als640b, sn74as640 octal bus transceivers with 3-state outputs sdas122a december 1983 revised january 1995 5 post office box 655303 ? dallas, texas 75265 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 w , r2 = 500 w , t a = min to max 2 unit sn54as640 sn74as640 min max min max t plh aorb bora 1 8 2 7 ns t phl a or b b or a 1 7 2 6 ns t pzh oe aorb 2 10 2 8 ns t pzl oe a or b 2 12 2 10 ns t phz oe aorb 2 9 2 8 ns t plz oe a or b 2 16 2 13 ns 2 for conditions shown as min or max, use the appropriate value specified under recommended operating conditions.
sn54als640b, sn54as640, sn74als640b, sn74as640 octal bus transceivers with 3-state outputs sdas122a december 1983 revised january 1995 6 post office box 655303 ? dallas, texas 75265 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
packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) 5962-88727012a obsolete lccc fk 20 tbd call ti call ti 5962-8872701ra active cdip j 20 1 tbd a42 snpb n / a for pkg type 5962-8872701sa active cfp w 20 1 tbd call ti n / a for pkg type 5962-89553012a active lccc fk 20 1 tbd post-plate n / a for pkg type 5962-8955301ra active cdip j 20 1 tbd a42 snpb n / a for pkg type 5962-8955301sa obsolete cfp w 20 tbd call ti call ti sn54als640bj active cdip j 20 1 tbd a42 snpb n / a for pkg type sn54as640j active cdip j 20 1 tbd a42 snpb n / a for pkg type sn74als640b-1dw active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640b-1dwe4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640b-1dwg4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640b-1dwr active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640b-1dwre4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640b-1dwrg4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640b-1n active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type sn74als640b-1n3 obsolete pdip n 20 tbd call ti call ti sn74als640b-1ne4 active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type sn74als640b-1nsr active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640b-1nsre4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74ALS640B-1NSRG4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bdw active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bdwe4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bdwg4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bdwr active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bdwre4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bdwrg4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bn active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type sn74als640bne4 active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type sn74als640bnsr active so ns 20 2000 green (rohs & cu nipdau level-1-260c-unlim package option addendum www.ti.com 23-apr-2008 addendum-page 1
orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) no sb/br) sn74als640bnsre4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als640bnsrg4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640dw active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640dwe4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640dwg4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640dwr active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640dwre4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640dwrg4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640n active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type sn74as640ne4 active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type sn74as640nsr active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640nsre4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74as640nsrg4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim snj54als640bfk obsolete lccc fk 20 tbd call ti call ti snj54als640bj active cdip j 20 1 tbd a42 snpb n / a for pkg type snj54als640bw active cfp w 20 1 tbd call ti n / a for pkg type snj54as640fk active lccc fk 20 1 tbd post-plate n / a for pkg type snj54as640j active cdip j 20 1 tbd a42 snpb 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 package option addendum www.ti.com 23-apr-2008 addendum-page 2
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. package option addendum www.ti.com 23-apr-2008 addendum-page 3
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 sn74als640b-1dwr soic dw 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 q1 sn74als640bdwr soic dw 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 q1 sn74as640dwr soic dw 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 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) sn74als640b-1dwr soic dw 20 2000 346.0 346.0 41.0 sn74als640bdwr soic dw 20 2000 346.0 346.0 41.0 sn74as640dwr soic dw 20 2000 346.0 346.0 41.0 package materials information www.ti.com 11-mar-2008 pack materials-page 2

mechanical data mlcc006b october 1996 post office box 655303 ? dallas, texas 75265 fk (s-cqcc-n**) leadless ceramic chip carrier 4040140 / d 10/96 28 terminal shown b 0.358 (9,09) max (11,63) 0.560 (14,22) 0.560 0.458 0.858 (21,8) 1.063 (27,0) (14,22) a no. of min max 0.358 0.660 0.761 0.458 0.342 (8,69) min (11,23) (16,26) 0.640 0.739 0.442 (9,09) (11,63) (16,76) 0.962 1.165 (23,83) 0.938 (28,99) 1.141 (24,43) (29,59) (19,32) (18,78) ** 20 28 52 44 68 84 0.020 (0,51) terminals 0.080 (2,03) 0.064 (1,63) (7,80) 0.307 (10,31) 0.406 (12,58) 0.495 (12,58) 0.495 (21,6) 0.850 (26,6) 1.047 0.045 (1,14) 0.045 (1,14) 0.035 (0,89) 0.035 (0,89) 0.010 (0,25) 12 13 14 15 16 18 17 11 10 8 9 7 5 4 3 2 0.020 (0,51) 0.010 (0,25) 6 1 28 26 27 19 21 b sq a sq 22 23 24 25 20 0.055 (1,40) 0.045 (1,14) 0.028 (0,71) 0.022 (0,54) 0.050 (1,27) 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 metal lid. d. the terminals are gold plated. e. falls within jedec ms-004

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 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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 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