sn54als688, sn74als688 8-bit identity comparators sdas228a june 1982 revised january 1995 copyright ? 1995, texas instruments incorporated 1 post office box 655303 ? dallas, texas 75265 ? compare two 8-bit words ? totem-pole outputs (p = q ) ? als688 are identical to als521 ? package options include plastic small-outline (dw) packages, ceramic chip carriers (fk), and standard plastic (n) and ceramic (j) 300-mil dips description these identity comparators perform comparisons on two 8-bit binary or bcd words and provide p = q outputs. these devices have totem-pole outputs. the sn54als688 is characterized for operation over the full military temperature range of 55 c to 125 c. the sn74als688 is characterized for operation from 0 c to 70 c. function table inputs output data p, q enable g output p = q p = q l l p > q lh p < q lh x h h 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 g p0 q0 p1 q1 p2 q2 p3 q3 gnd v cc p = q q7 p7 q6 p6 q5 p5 q4 p4 sn54als688 ...j p ackage sn74als688 ... dw or n package (top view) 3212019 910111213 4 5 6 7 8 18 17 16 15 14 q7 p7 q6 p6 q5 p1 q1 p2 q2 p3 sn54als688 . . . fk package (top view) q0 p0 g q4 p5 p = q q3 gnd p4 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.
sn54als688, sn74als688 8-bit identity comparators sdas228a june 1982 revised january 1995 2 post office box 655303 ? dallas, texas 75265 logic symbol 2 comp g1 1 0 2 p0 4 p1 6 p2 8 p3 11 p4 13 p5 15 p6 7 17 p7 0 3 q0 5 q1 7 q2 9 q3 12 q4 14 q5 16 q6 7 18 q7 19 1p=q g p q p = q 2 this symbol is in accordance with ansi/ieee std 91-1984 and iec publication 617-12.
sn54als688, sn74als688 8-bit identity comparators sdas228a june 1982 revised january 1995 3 post office box 655303 ? dallas, texas 75265 logic diagram (positive logic) 19 17 18 15 16 13 14 11 12 8 9 6 7 4 5 2 3 1 p = q p7 q7 p6 q6 p5 q5 p4 q4 p3 q3 p2 q2 p1 q1 p0 q0 g absolute maximum ratings over operating free-air temperature range (unless otherwise noted) 2 supply voltage, v cc 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage, v i 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating free-air temperature range, t a : sn54als688 55 c to 125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sn74als688 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.
sn54als688, sn74als688 8-bit identity comparators sdas228a june 1982 revised january 1995 4 post office box 655303 ? dallas, texas 75265 recommended operating conditions sn54als688 sn74als688 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 1 2.6 ma i ol low-level output current 12 24 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 sn54als688 sn74als688 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 v cc =45v i oh = 1 ma 2.4 3.3 v v cc = 4 . 5 v i oh = 2.6 ma 2.4 3.3 v ol v cc =45v i ol = 12 ma 0.25 0.4 0.25 0.4 v v ol v cc = 4 . 5 v i ol = 24 ma 0.35 0.5 v 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 m a i il v cc = 5.5 v, v i = 0.4 v 0.1 0.1 ma i o 3 v cc = 5.5 v, v o = 2.25 v 20 112 30 112 ma i cc v cc = 5.5 v, see note 1 12 19 12 19 ma 2 all typical values are at v cc = 5 v, t a = 25 c. 3 the output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, i os . note 1: i cc is measured with g grounded, p and q at 4.5 v. switching characteristics (see figure 1) parameter from ( input ) to ( output ) v cc = 4.5 v to 5.5 v, c l = 50 pf, r l = 500 w , t a = min to max unit (input) (output) sn54als688 sn74als688 min max min max t plh p pq 3 16 3 12 ns t phl p p = q 5 25 5 20 ns t plh q pq 3 16 3 12 ns t phl q p = q 5 25 5 20 ns t plh g p=q 3 15 3 12 ns t phl g p = q 5 25 5 22 ns for conditions shown as min or max, use the appropriate value specified under recommended operating conditions.
sn54als688, sn74als688 8-bit identity comparators sdas228a june 1982 revised january 1995 5 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) 5962-88578012a active lccc fk 20 1 tbd call ti level-nc-nc-nc 5962-8857801ra active cdip j 20 1 tbd call ti level-nc-nc-nc 5962-8857801sa active cfp w 20 1 tbd call ti level-nc-nc-nc sn54als688j active cdip j 20 1 tbd call ti level-nc-nc-nc sn74als688dw active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als688dwe4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als688dwr active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als688dwre4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als688n active pdip n 20 20 pb-free (rohs) cu nipdau level-nc-nc-nc sn74als688n3 obsolete pdip n 20 tbd call ti call ti sn74als688ne4 active pdip n 20 20 pb-free (rohs) cu nipdau level-nc-nc-nc sn74als688nsr active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim sn74als688nsre4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim snj54als688fk active lccc fk 20 1 tbd call ti level-nc-nc-nc snj54als688j active cdip j 20 1 tbd call ti level-nc-nc-nc SNJ54ALS688W active cfp w 20 1 tbd call ti level-nc-nc-nc (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) 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. 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. package option addendum www.ti.com 26-sep-2005 addendum-page 1
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 26-sep-2005 addendum-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
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