tl/f/9917 54ac/74ac14 hex inverter with schmitt trigger input june 1993 54ac/74ac14 hex inverter with schmitt trigger input general description the 'ac14 contains six inverter gates each with a schmitt trigger input. the 'ac14 contains six logic inverters which accept standard cmos input signals and provide standard cmos output levels. they are capable of transforming slowly changing input signals into sharply defined, jitter-free output signals. in addition, they have a greater noise margin than conventional inverters. the 'ac14 has hysteresis between the positive-going and negative-going input thresholds (typically 1.0v) which is de- termined internally by transistor ratios and is essentially in- sensitive to temperature and supply voltage variations. features y i cc reduced by 50% y outputs source/sink 24 ma y standard military drawing (smd) e 'ac14: 5962-87624 logic symbol ieee/iec tl/f/9917 1 connection diagrams pin assignment for dip, flatpak and soic tl/f/9917 2 pin assignment for lcc tl/f/9917 3 function table input output ao lh hl pin names description i n inputs o n outputs fact tm is a trademark of national semiconductor corporation. c 1995 national semiconductor corporation rrd-b30m75/printed in u. s. a.
absolute maximum ratings (note 1) if military/aerospace specified devices are required, please contact the national semiconductor sales office/distributors for availability and specifications. supply voltage (v cc ) b 0.5v to a 7.0v dc input diode current (i ik ) v i eb 0.5v b 20 ma v i e v cc a 0.5v a 20 ma dc input voltage (v i ) b 0.5v to v cc a 0.5v dc output diode current (i ok ) v o eb 0.5v b 20 ma v o e v cc a 0.5v a 20 ma dc output voltage (v o ) b 0.5v to v cc a 0.5v dc output source or sink current (i o ) g 50 ma dc v cc or ground current per output pin (i cc or i gnd ) g 50 ma storage temperature (t stg ) b 65 cto a 150 c junction temperature (t j ) cdip 175 c pdip 140 c note 1: absolute maximum ratings are those values beyond which damage to the device may occur. the databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. national does not recom- mend operation of fact tm circuits outside databook specifications. recommended operating conditions supply voltage (v cc ) 'ac 2.0v to 6.0v input voltage (v i ) 0vtov cc output voltage (v o ) 0vtov cc operating temperature (t a ) 74ac b 40 cto a 85 c 54ac b 55 cto a 125 c dc characteristics for 'ac family devices 74ac 54ac 74ac symbol parameter v cc t a ea 25 c t a e t a e units conditions (v) b 55 cto a 125 c b 40 cto a 85 c typ guaranteed limits v oh minimum high level 3.0 2.99 2.9 2.9 2.9 i out eb 50 m a output voltage 4.5 4.49 4.4 4.4 4.4 v 5.5 5.49 5.4 5.4 5.4 * v in e v il or v ih 3.0 2.56 2.4 2.46 b 12 ma 4.5 3.86 3.7 3.76 v i oh b 24 ma 5.5 4.86 4.7 4.76 b 24 ma v ol maximum low level 3.0 0.002 0.1 0.1 0.1 i out e 50 m a output voltage 4.5 0.001 0.1 0.1 0.1 v 5.5 0.001 0.1 0.1 0.1 * v in e v il or v ih 3.0 0.36 0.5 0.44 12 ma 4.5 0.36 0.5 0.44 v i ol 24 ma 5.5 0.36 0.5 0.44 24 ma i in maximum input 5.5 g 0.1 g 1.0 g 1.0 m a v i e v cc , gnd leakage current v t a maximum positive 3.0 2.2 2.2 2.2 t a e worst case threshold 4.5 3.2 3.2 3.2 v 5.5 3.9 3.9 3.9 v t b minimum negative 3.0 0.5 0.5 0.5 t a e worst case threshold 4.5 0.9 0.9 0.9 v 5.5 1.1 1.1 1.1 * all outputs loaded; thresholds on input associated with output under test. 2
dc characteristics for 'ac family devices (continued) 74ac 54ac 74ac symbol parameter v cc t a ea 25 c t a e t a e units conditions (v) b 55 cto a 125 c b 40 cto a 85 c typ guaranteed limits v h(max) maximum hysteresis 3.0 1.2 1.2 1.2 t a e worst case 4.5 1.4 1.4 1.4 v 5.5 1.6 1.6 1.6 v h(min) minimum hysteresis 3.0 0.3 0.3 0.3 t a e worst case 4.5 0.4 0.4 0.4 v 5.5 0.5 0.5 0.5 i old 2 minimum dynamic 5.5 50 75 ma v old e 1.65v max i ohd output current 5.5 b 50 b 75 ma v ohd e 3.85v min i cc maximum quiescent 5.5 2.0 40.0 20.0 m a v in e v cc supply current or gnd 2 maximum test duration 2.0 ms, one output loaded at a time. note: i in and i cc @ 3.0v are guaranteed to be less than or equal to the respective limit @ 5.5v v cc . i cc for 54ac @ 25 c is identical to 74ac @ 25 c. ac electrical characteristics 74ac 54ac 74ac v cc * t a ea 25 c t a eb 55 ct a eb 40 c symbol parameter (v) c l e 50 pf to a 125 cto a 85 c units c l e 50 pf c l e 50 pf min typ max min max min max t plh propagation delay 3.3 1.5 9.5 13.5 1.0 16.0 1.5 15.0 ns 5.0 1.5 7.0 10.0 1.0 12.0 1.5 11.0 t phl propagation delay 3.3 1.5 7.5 11.5 1.0 14.0 1.5 13.0 ns 5.0 1.5 6.0 8.5 1.5 10.0 1.5 9.5 * voltage range 3.3 is 3.3v g 0.3v voltage range 5.0 is 5.0v g 0.5v capacitance symbol parameter typ units conditions c in input capacitance 4.5 pf v cc e open c pd power dissipation 25.0 pf v cc e 5.0v capacitance 3
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: 74ac 14 p c qr temperature range family special variations 74ac e commercial x e devices shipped in 13 reels 54ac e military qr e commercial grade device with burn-in device type qb e military grade device with environmental and burn-in package code processing shipped in tubes p e plastic dip d e ceramic dip temperature range f e flatpak c e commercial ( b 40 cto a 85 c) l e leadless ceramic chip carrier (lcc) m e military ( b 55 cto a 125 c) s e small outline (soic) physical dimensions inches (millimeters) 20 terminal ceramic leadless chip carrier (l) ns package number e20a 4
physical dimensions inches (millimeters) (continued) 14-lead ceramic dual-in-line package (d) ns package number j14a 14-lead small outline integrated circuit (s) ns package number m14a 5
54ac/74ac14 hex inverter with schmitt trigger input physical dimensions inches (millimeters) (continued) 14-lead plastic dual-in-line package (p) ns package number n14a 14-lead ceramic flatpak (f) ns package number w14b 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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