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sn54hct245, SN74HCT245 octal bus transceivers with 3-state outputs scls020e ? march 1984 ? revised august 2003 1 post office box 655303 ? dallas, texas 75265 operating voltage range of 4.5 v to 5.5 v high-current 3-state outputs drive bus lines directly or up to 15 lsttl loads low power consumption, 80- a max i cc typical t pd = 14 ns 6-ma output drive at 5 v low input current of 1 a max inputs are ttl-voltage compatible description/ordering information these octal bus transceivers are designed for asynchronous two-way communication between data buses. the control-function implementation minimizes external timing requirements. the ?hct245 devices allow data transmission from the a bus to the b bus or from the b bus to the a bus, depending upon the logic 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. ordering information t a package ? orderable part number top-side marking ?40 c to 85 c pdip ? n tube of 20 SN74HCT245n SN74HCT245n ?40 c to 85 c soic ? dw tube of 25 SN74HCT245dw hct245 ?40 c to 85 c soic ? dw reel of 2000 SN74HCT245dwr hct245 ?40 c to 85 c sop ? ns reel of 2000 SN74HCT245nsr hct245 ?40 c to 85 c ssop ? db reel of 2000 SN74HCT245dbr ht245 tssop ? pw tube of 70 SN74HCT245pw ht245 tssop ? pw reel of 2000 SN74HCT245pwr ht245 reel of 250 SN74HCT245pwt ?55 c to 125 c cdip ? j tube of 20 snj54hct245j snj54hct245j ?55 c to 125 c cfp ? w tube of 85 snj54hct245w snj54hct245w lccc ? fk tube of 55 snj54hct245fk snj54hct245fk ? package drawings, standard packing quantities, thermal data, symbolization, and pcb design guidelines are available at www.ti.com/sc/package. please be aware that an important notice concerning avail ability, standard warranty, and use in critical applications o f texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 3 2 1 20 19 910111213 4 5 6 7 8 18 17 16 15 14 b1 b2 b3 b4 b5 a3 a4 a5 a6 a7 a2 a1 dir b7 b6 oe a8 gnd b8 v cc sn54hct245 . . . fk package (top view) 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 sn54hct245 ...j or w p ackage SN74HCT245 . . . db, dw, n, ns, or pw package (top view) copyright ? 2003, 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. on products compliant to mil-prf-38535, all parameters are tested unless otherwise noted. on all other products, production processing does not necessarily include testing of all parameters.
sn54hct245, SN74HCT245 octal bus transceivers with 3-state outputs scls020e ? march 1984 ? revised august 2003 2 post office box 655303 ? dallas, texas 75265 function table inputs operation oe dir operation l l b data to a bus l h a data to b bus h x isolation logic diagram (positive logic) dir oe a1 b1 1 2 18 19 to seven other channels 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): db package 70 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . dw package 58 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . n package 69 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ns package 60 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pw package 83 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 rating s only, and 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.
sn54hct245, SN74HCT245 octal bus transceivers with 3-state outputs scls020e ? march 1984 ? revised august 2003 3 post office box 655303 ? dallas, texas 75265 recommended operating conditions (see note 3) sn54hct245 SN74HCT245 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/ ? v input transition rise/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 sn54hct245 SN74HCT245 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 dir or oe v i = v cc or 0 5.5 v 0.1 100 1000 1000 na i oz a or b v o = v cc or 0 5.5 v 0.01 0.5 10 5 a 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 ? dir or oe 4.5 v to 5.5 v 3 10 10 10 pf ? 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 . ? parameter c i does not apply to transceiver i/o ports. 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 sn54hct245 SN74HCT245 unit parameter from (input) to (output) v cc min typ max min max min max unit t pd a or b b or a 4.5 v 16 22 33 28 ns t pd a or b b or a 5.5 v 14 20 30 25 ns t en oe a or b 4.5 v 25 46 69 58 ns t en oe a or b 5.5 v 22 41 62 52 ns t dis oe a or b 4.5 v 26 40 60 50 ns t dis oe a or b 5.5 v 23 36 54 45 ns t t a or b 4.5 v 9 12 18 15 ns t t a or b 5.5 v 8 11 16 14 ns
sn54hct245, SN74HCT245 octal bus transceivers with 3-state outputs scls020e ? march 1984 ? revised august 2003 4 post office box 655303 ? dallas, texas 75265 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 sn54hct245 SN74HCT245 unit parameter from (input) to (output) v cc min typ max min max min max unit t pd a or b b or a 4.5 v 20 30 45 38 ns t pd a or b b or a 5.5 v 18 27 41 34 ns t en oe a or b 4.5 v 36 59 89 74 ns t en oe a or b 5.5 v 30 53 80 67 ns t t a or b 4.5 v 17 42 63 53 ns t t a or b 5.5 v 14 38 57 48 ns operating characteristics, t a = 25 c parameter test conditions typ unit c pd power dissipation capacitance per transceiver no load 40 pf
sn54hct245, SN74HCT245 octal bus transceivers with 3-state outputs scls020e ? march 1984 ? revised august 2003 5 post office box 655303 ? dallas, texas 75265 parameter measurement information from output under test r l v cc s1 s2 load circuit parameter c l t pzh t pd or t t t dis t en t pzl t phz t plz 1 k ? 1 k ? 50 pf or 150 pf 50 pf open closed r l s1 closed open s2 open closed closed open 50 pf or 150 pf open open ?? notes: a. c l includes probe and test-fixture 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. 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. d. the outputs are measured one at a time with one input transition per measurement. e. t plz and t phz are the same as t dis . f. t pzl and t pzh are the same as t en . g. t plh and t phl are the same as t pd . c l (see note a) test point voltage waveform input rise and fall times 1.3 v 1.3 v 0.3 v 0.3 v 2.7 v 2.7 v 3 v 0 v t r t f input voltage waveforms propagation delay and output rise and fall 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 in-phase output 1.3 v t plh t phl 1.3 v 1.3 v 10% 10% 90% 90% v oh v ol t r t f t phl t plh out-of- phase output 1.3 v 10% 90% 3 v v cc v ol 0 v output control (low-level enabling) output waveform 1 (see note b) 1.3 v t pzl t plz voltage waveforms enable and disable times for 3-state outputs v oh 0 v 1.3 v 1.3 v t pzh t phz output waveform 2 (see note b) figure 1. load circuit 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) 5962-8550601vra active cdip j 20 1 tbd a42 snpb n / a for pkg type 5962-8550601vsa active cfp w 20 1 tbd call ti n / a for pkg type 85506012a active lccc fk 20 1 tbd post-plate n / a for pkg type 8550601ra active cdip j 20 1 tbd a42 snpb n / a for pkg type jm38510/65553bra active cdip j 20 1 tbd a42 snpb n / a for pkg type jm38510/65553bsa active cfp w 20 1 tbd call ti n / a for pkg type sn54hct245j active cdip j 20 1 tbd a42 snpb n / a for pkg type SN74HCT245dble obsolete ssop db 20 tbd call ti call ti SN74HCT245dbr active ssop db 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dbre4 active ssop db 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dbrg4 active ssop db 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dw active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dwe4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dwg4 active soic dw 20 25 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dwr active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dwre4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245dwrg4 active soic dw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245n active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type SN74HCT245n3 obsolete pdip n 20 tbd call ti call ti SN74HCT245ne4 active pdip n 20 20 pb-free (rohs) cu nipdau n / a for pkg type SN74HCT245nsr active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245nsre4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245nsrg4 active so ns 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pw active tssop pw 20 70 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pwe4 active tssop pw 20 70 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pwg4 active tssop pw 20 70 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pwle obsolete tssop pw 20 tbd call ti call ti SN74HCT245pwr active tssop pw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pwre4 active tssop pw 20 2000 green (rohs & no sb/br) 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) SN74HCT245pwrg4 active tssop pw 20 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pwt active tssop pw 20 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pwte4 active tssop pw 20 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim SN74HCT245pwtg4 active tssop pw 20 250 green (rohs & no sb/br) cu nipdau level-1-260c-unlim snj54hct245fk active lccc fk 20 1 tbd post-plate n / a for pkg type snj54hct245j active cdip j 20 1 tbd a42 snpb n / a for pkg type snj54hct245w active cfp w 20 1 tbd call ti 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 to customer on an annual basis. package option addendum www.ti.com 23-apr-2008 addendum-page 2
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 SN74HCT245dbr ssop db 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 q1 SN74HCT245dwr soic dw 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 q1 SN74HCT245pwr tssop pw 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 q1 package materials information www.ti.com 15-mar-2008 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) SN74HCT245dbr ssop db 20 2000 346.0 346.0 33.0 SN74HCT245dwr soic dw 20 2000 346.0 346.0 41.0 SN74HCT245pwr tssop pw 20 2000 346.0 346.0 33.0 package materials information www.ti.com 15-mar-2008 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

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
mechanical data mtss001c january 1995 revised february 1999 post office box 655303 ? dallas, texas 75265 pw (r-pdso-g**) plastic small-outline package 14 pins shown 0,65 m 0,10 0,10 0,25 0,50 0,75 0,15 nom gage plane 28 9,80 9,60 24 7,90 7,70 20 16 6,60 6,40 4040064/f 01/97 0,30 6,60 6,20 8 0,19 4,30 4,50 7 0,15 14 a 1 1,20 max 14 5,10 4,90 8 3,10 2,90 a max a min dim pins ** 0,05 4,90 5,10 seating plane 0 8 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-153

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