tl/f/10187 DM54LS447/dm74ls447 bcd to 7-segment decoder/driver with open-collector outputs may 1992 DM54LS447/dm74ls447 bcd to 7-segment decoder/driver with open-collector outputs general description the 'ls447 is the same as the 'ls247 except that the out- put off voltage, v oh is specified as 7.0v rather than 15v, with the same i oh limit of 250 m a. for all other information please refer to the 'ls247 data sheet. connection diagram dual-in-line package tl/f/10187 1 order number DM54LS447j, DM54LS447w, dm74ls447m or dm74ls447n see ns package number j16a, m16a, n16e or w16a 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 DM54LS447 dm74ls447 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 (bi /rbo ) b 50 b 50 m a i ol low level output current 12 24 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 v cc e min, i oh e max, dm54 2.4 v voltage v il e max (bi /rbo ) dm74 2.4 3.4 i off high level output current segment outputs, v o e 7.0v (a g ) 250 m a v ol low level output v cc min, i ol e max, dm54 0.4 voltage v ih e min dm74 0.35 0.5 v i ol e 12 ma, v cc e min dm74 0.25 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 others b 0.4 ma bi /rbo inputs b 1.2 ma i os short circuit v cc e max dm54 b 0.3 b 2.0 ma output current (note 2) dm74 b 0.3 b 2.0 i cc supply current v cc e max 13 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 at v cc e 5v, t a e 25 c symbol parameter r l e 2k x ,c l e 15 pf units min max t plh propagation delay 100 ns t phl 100 2
logic symbol tl/f/10187 2 v cc e pin 16 gnd e pin 8 state diagram tl/f/10187 3 3
physical dimensions inches (millimeters) 16-lead ceramic dual-in-line package (j) order number DM54LS447j ns package number j16a 4
physical dimensions inches (millimeters) (continued) 16-lead small outline molded package (m) order number dm74ls447m ns package number m16a 16-lead molded dual-in-line package (n) order number dm74ls447n ns package number n16e 5
DM54LS447/dm74ls447 bcd to 7-segment decoder/driver with open-collector outputs physical dimensions inches (millimeters) (continued) 16-lead ceramic flat package (w) order number DM54LS447w ns package number w16a 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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