tl/f/10174 dm54ls55/dm74ls55 2-wide, 4-input and-or-invert gate april 1992 dm54ls55/dm74ls55 2-wide, 4-input and-or-invert gate general description this device contains a combination of and-or-invert functions. the internal gates are configured as two, four-input and gates with their outputs connected to a two-input nor gate. connection diagram dual-in-line package tl/f/10174 1 order number dm54ls55j, dm54ls55w, dm74ls55m or dm74ls55n see ns package number j14a, m14a, n14a or w14b function table y e abcd a efgh inputs output abcdefgh y hhhhxx xx l xxxxhhhh l all other combinations h h e high logic level l e low logic level x e either low or high logic level c 1995 national semiconductor corporation rrd-b30m105/printed in u. s. a.
absolute maximum ratings (note) if military/aerospace specified devices are required, please contact the national semiconductor sales office/distributors for availability and specifications. supply voltage 7v input voltage 7v operating free air temperature range dm54ls b 55 cto a 125 c dm74ls 0 cto a 70 c storage temperature range b 65 cto a 150 c note: the ``absolute maximum ratings'' are those values beyond which the safety of the device cannot be guaran- teed. the device should not be operated at these limits. the parametric values defined in the ``electrical characteristics'' table are not guaranteed at the absolute maximum ratings. the ``recommended operating conditions'' table will define the conditions for actual device operation. recommended operating conditions symbol parameter dm54ls55 dm74ls55 units min nom max min nom max v cc supply voltage 4.5 5 5.5 4.75 5 5.25 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 b 0.4 b 0.4 ma i ol low level output current 4 8 ma t a free air operating temperature b 55 125 0 70 c electrical characteristics over recommended operating free air temperature range (unless otherwise noted) symbol parameter conditions min typ max units (note 1) v i input clamp voltage v cc e min, i i eb 18 ma b 1.5 v v oh high level output voltage v cc e min, i oh e max, dm54 2.5 v v il e max dm74 2.7 v ol low level output voltage v cc e min, i ol e max, dm54 0.4 v ih e min dm74 0.5 v i ol e 4 ma, v cc e min dm74 0.4 i i input current @ max v cc e max, v i e 7v 0.1 ma input voltage v i e 10v (dm54) i ih high level input current v cc e max, v i e 2.7v 20 m a i il low level input current v cc e max, v i e 0.4v b 0.4 ma i os short circuit v cc e max dm54 b 20 b 100 ma output current (note 2) dm74 b 20 b 100 i cch supply current with outputs high v cc e max, v in e gnd 0.8 ma i ccl supply current with outputs low v cc e max, v in e open 1.3 ma note 1: all typicals are at v cc e 5v, t a e 25 c. note 2: not more than one output should be shorted at a time, and the duration should not exceed one second. switching characteristics v cc ea 5.0v, t a ea 25 c symbol parameter c l e 15 pf, r l e 2k x units min max t plh propagation delay time 15 ns t phl 15 2
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physical dimensions inches (millimeters) 14-lead ceramic dual-in-line package (j) order number dm54ls55j ns package number j14a 4
physical dimensions inches (millimeters) (continued) 14-lead small outline molded package (m) order number dm74ls55m ns package number m14a 14-lead molded dual-in-line package (n) order number dm74ls55n ns package number n14a 5
dm54ls55/dm74ls55 2-wide, 4-input and-or-invert gate physical dimensions inches (millimeters) (continued) 14-lead ceramic flat package (w) order number dm54ls55w 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 corporation europe hong kong ltd. japan ltd. 1111 west bardin road fax: ( a 49) 0-180-530 85 86 13th floor, straight block, tel: 81-043-299-2309 arlington, tx 76017 email: cnjwge @ tevm2.nsc.com ocean centre, 5 canton rd. fax: 81-043-299-2408 tel: 1(800) 272-9959 deutsch tel: ( a 49) 0-180-530 85 85 tsimshatsui, kowloon fax: 1(800) 737-7018 english tel: ( a 49) 0-180-532 78 32 hong kong fran 3 ais tel: ( a 49) 0-180-532 93 58 tel: (852) 2737-1600 italiano tel: ( a 49) 0-180-534 16 80 fax: (852) 2736-9960 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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