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tl/f/9501 54f/74f240 # 54f/74f241 # 54f/74f244 octal buffers/line drivers with tri-state outputs may 1995 54f/74f240 # 54f/74f241 # 54f/74f244 octal buffers/line drivers with tri-state outputs general description the 'f240, 'f241 and 'f244 are octal buffers and line driv- ers designed to be employed as memory and address driv- ers, clock drivers and bus-oriented transmitters/receivers which provide improved pc and board density. features y tri-state outputs drive bus lines or buffer memory address registers y outputs sink 64 ma (48 ma mil) y 12 ma source current y input clamp diodes limit high-speed termination effects y guaranteed 4000v minimum esd protection commercial military package package description number 74f240pc n20a 20-lead (0.300 wide) molded dual-in-line 54f240dm (note 2) j20a 20-lead ceramic dual-in-line 74f240sc (note 1) m20b 20-lead (0.300 wide) molded small outline, jedec 74f240sj (note 1) m20d 20-lead (0.300 wide) molded small outline, eiaj 54f240fm (note 2) w20a 20-lead cerpack 54f240lm (note 2) e20a 20-lead ceramic leadless chip carrier, type c 74f241pc n20a 20-lead (0.300 wide) molded dual-in-line 54f241dm (note 2) j20a 20-lead ceramic dual-in-line 74f241sc (note 1) m20b 20-lead (0.300 wide) molded small outline, jedec 74f241sj (note 1) m20d 20-lead (0.300 wide) molded small outline, eiaj 54f241fm (note 2) w20a 20-lead cerpack 54f241lm (note 2) e20a 20-lead ceramic leadless chip carrier, type c 74f244pc n20a 20-lead (0.300 wide) molded dual-in-line 54f244dm (note 2) j20a 20-lead ceramic dual-in-line 74f244sc (note 1) m20b 20-lead (0.300 wide) molded small outline, jedec 74f244sj (note 1) m20d 20-lead (0.300 wide) molded small outline, eiaj 74f244msa (note 1) msa20 20-lead molded shrink small outline, eiaj type ii 54f244fm (note 2) w20a 20-lead cerpack 54f244lm (note 2) e20a 20-lead ceramic leadless chip carrier, type c note 1: devices also available in 13 reel. use suffix e scx, sjx and msax. note 2: military grade device with environmental and burn-in processing. use suffix e dmqb, fmqb and lmqb. tri-state is a registered trademark of national semiconductor corporation. c 1995 national semiconductor corporation rrd-b30m75/printed in u. s. a.
connection diagrams pin assignment for lcc 'f240 tl/f/9501 2 'f241 tl/f/9501 4 'f244 tl/f/9501 6 pin assignment for dip, soic, ssop and flatpak tl/f/9501 1 tl/f/9501 3 tl/f/9501 5 logic symbols ieee/iec 'f240 tl/f/9501 7 ieee/iec 'f241 tl/f/9501 8 ieee/iec 'f244 tl/f/9501 9 2
unit loading/fan out 54f/74f pin names description u.l. input i ih /i il high/low output i oh /i ol oe 1 ,oe 2 tri-state output enable input (active low) 1.0/1.667 20 m a/ b 1ma oe 2 tri-state output enable input (active high) 1.0/1.667 20 m a/ b 1ma i 0 i 7 inputs ('f240) 1.0/1.667 * 20 m a/ b 1ma i 0 i 7 inputs ('f241, 'f244) 1.0/2.667 * 20 m a/ b 1.6 ma o 0 o 7 ,o 0 o 7 outputs 600/106.6 (80) b 12 ma/64 ma (48 ma) * worst-case 'f240 enabled; 'f241, 'f244 disabled truth tables 'f240 oe 1 d 1n o 1n oe 2 d 2n o 2n hxzhxz lhl lhl llhllh 'f241 oe 1 d 1n o 1n oe 2 d 2n o 2n hxz lxz lhhhhh lllhll 'f244 oe 1 d 1n o 1n oe 2 d 2n o 2n hxzhxz lhhlhh llllll h e high voltage level l e low voltage level x e immaterial z e high impedance 3
absolute maximum ratings (note 1) if military/aerospace specified devices are required, please contact the national semiconductor sales office/distributors for availability and specifications. storage temperature b 65 cto a 150 c ambient temperature under bias b 55 cto a 125 c junction temperature under bias b 55 cto a 175 c plastic b 55 cto a 150 c v cc pin potential to ground pin b 0.5v to a 7.0v input voltage (note 2) b 0.5v to a 7.0v input current (note 2) b 30 ma to a 5.0 ma voltage applied to output in high state (with v cc e 0v) standard output b 0.5v to v cc tri-state output b 0.5v to a 5.5v current applied to output in low state (max) twice the rated i ol (ma) esd last passing voltage (min) 4000v note 1: absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. functional operation under these conditions is not implied. note 2: either voltage limit or current limit is sufficient to protect inputs. recommended operating conditions free air ambient temperature military b 55 cto a 125 c commercial 0 cto a 70 c supply voltage military a 4.5v to a 5.5v commercial a 4.5v to a 5.5v dc electrical characteristics symbol parameter 54f/74f units v cc conditions min typ max v ih input high voltage 2.0 v recognized as a high signal v il input low voltage 0.8 v recognized as a low signal v cd input clamp diode voltage b 1.2 v min i in eb 18 ma v oh output high 54f 10% v cc 2.4 i oh eb 3ma voltage 54f 10% v cc 2.0 i oh eb 12 ma 74f 10% v cc 2.4 v min i oh eb 3ma 74f 10% v cc 2.0 i oh eb 15 ma 74f 5% v cc 2.7 i oh eb 3ma v ol output low 54f 10% v cc 0.55 v min i ol e 48 ma voltage 74f 10% v cc 0.55 i ol e 64 ma i ih input high 54f 20.0 m a max v in e 2.7v current 74f 5.0 i bvi input high current 54f 100 m a max v in e 7.0v breakdown test 74f 7.0 i cex output high 54f 250 m a max v out e v cc leakage current 74f 50 v id input leakage 74f 4.75 v 0.0 i id e 1.9 m a test all other pins grounded i od output leakage 74f 3.75 m a 0.0 v iod e 150 mv circuit current all other pins grounded i il input low current b 1.0 ma max v in e 0.5v (oe 1 ,oe 2 ,oe 2 ,d n ('f240)) b 1.6 v in e 0.5v (d n ('f241, 'f244)) i ozh output leakage current 50 m a max v out e 2.7v i ozl output leakage current b 50 m a max v out e 0.5v i os output short-circuit current b 100 b 225 ma max v out e 0v i zz bus drainage test 500 m a 0.0v v out e 5.25v 4
dc electrical characteristics (continued) symbol parameter 54f/74f units v cc conditions min typ max i cch power supply current ('f240) 19 29 ma max v o e high i ccl power supply current ('f240) 50 75 ma max v o e low i ccz power supply current ('f240) 42 63 ma max v o e high z i cch power supply current 40 60 ma max v o e high ('f241, 'f244) i ccl power supply current 60 90 ma max v o e low ('f241, 'f244) i ccz power supply current 60 90 ma max v o e high z ('f241, 'f244) ac electrical characteristics 74f 54f 74f t a ea 25 c t a ,v cc e mil t a ,v cc e com symbol parameter v cc ea 5.0v c l e 50 pf c l e 50 pf units c l e 50 pf min typ max min max min max t plh propagation delay 3.0 5.1 7.0 3.0 9.0 3.0 8.0 ns t phl data to output ('f240) 2.0 3.5 4.7 2.0 6.0 2.0 5.7 t pzh output enable time ('f240) 2.0 3.5 4.7 2.0 6.5 2.0 5.7 t pzl 4.0 6.9 9.0 4.0 10.5 4.0 10.0 ns t phz output disable time ('f240) 2.0 4.0 5.3 2.0 6.5 2.0 6.3 t plz 2.0 6.0 8.0 2.0 12.5 2.0 9.5 t plh propagation delay 2.5 4.0 5.2 2.0 6.5 2.5 6.2 ns t phl data to output ('f241, 'f244) 2.5 4.0 5.2 2.0 7.0 2.5 6.5 t pzh output enable time 2.0 4.3 5.7 2.0 7.0 2.0 6.7 t pzl ('f241, 'f244) 2.0 5.4 7.0 2.0 8.5 2.0 8.0 ns t phz output disable time 2.0 4.5 6.0 2.0 7.0 2.0 7.0 t plz ('f241, 'f244) 2.0 4.5 6.0 2.0 7.5 2.0 7.0 ordering information the device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows: 74f 240/241/244 * scx temperature range family special variations 74f e commercia qb e military grade device with 54f e military environmental and burn-in processing device type x e devices shipped in 13 reel package code temperature range p e plastic dip c e commercial (0 cto a 70 c) d e ceramic dip m e military ( b 55 cto a 125 c) f e flatpak note: l e leadless chip carrier (lcc) not required for msa package s e small outline soic jedec code * msa e shrink small outline package (eiaj ssop) ('244 only) sj e small outline soic eiaj 5
6
physical dimensions inches (millimeters) 20-lead ceramic leadless chip carrier (l) ns package number e20a 20-lead ceramic dual-in-line package (d) ns package number j20a 7
physical dimensions inches (millimeters) (continued) 20-lead (0.300 wide) molded small outline package, jedec (s) ns package number m20b 20-lead (0.300 wide) molded small outline package, eiaj (sj) ns package number m20d 8
physical dimensions inches (millimeters) (continued) 20-lead molded shrink small outline, eiaj type ii (msa) ns package number msa20 20-lead (0.300 wide) molded dual-in-line package (p) ns package number n20a 9
54f/74f240 # 54f/74f241 # 54f/74f244 octal buffers/line drivers with tri-state outputs physical dimensions inches (millimeters) (continued) 20-lead ceramic flatpak (f) ns package number w20a life support policy national's products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of national semiconductor corporation. as used herein: 1. life support devices or systems are devices or 2. a critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. national semiconductor national semiconductor national semiconductor national semiconductor national semiconductores national semiconductor corporation gmbh japan ltd. hong kong ltd. do brazil ltda. (australia) pty, ltd. 2900 semiconductor drive livry-gargan-str. 10 sumitomo chemical 13th floor, straight block, rue deputado lacorda franco building 16 p.o. box 58090 d-82256 f 4 urstenfeldbruck engineering center ocean centre, 5 canton rd. 120-3a business park drive santa clara, ca 95052-8090 germany bldg. 7f tsimshatsui, kowloon sao paulo-sp monash business park tel: 1(800) 272-9959 tel: (81-41) 35-0 1-7-1, nakase, mihama-ku hong kong brazil 05418-000 nottinghill, melbourne twx: (910) 339-9240 telex: 527649 chiba-city, tel: (852) 2737-1600 tel: (55-11) 212-5066 victoria 3168 australia fax: (81-41) 35-1 ciba prefecture 261 fax: (852) 2736-9960 telex: 391-1131931 nsbr br tel: (3) 558-9999 tel: (043) 299-2300 fax: (55-11) 212-1181 fax: (3) 558-9998 fax: (043) 299-2500 national does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and national reserves the right at any time without notice to change said circuitry and specifications.

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