4-62 fast and ls ttl data 8-input multiplexer the mc54/74f151 is a high-speed 8-input digital multiplexer . it provides in one package, the ability to select one line of data from up to eight sources. the f151 can be used as a universal function generator to generate any logic function of four variables. both asserted and negated outputs are provided. the f151 is a logic implementation of a single pole, 8-position switch with the switch position controlled by the state of three select inputs, s 0 , s 1 , s 2 . the enable input (e ) is active low . the logic function provided at the output is: z = e ? (i 0 ? s 0 ? s 1 ? s 2 + i 1 ? s 0 ? s 1 ? s 2 + i 2 ? s 0 ? s 1 ? s 2 + i 3 ? s 0 ? s 1 ? s 2 + i 4 ? s 0 ? s 1 ? s 2 + i 5 ? s 0 ? s 1 ? s 2 + i 6 ? s 0 ? s 1 ? s 2 + i 7 ? s 0 ? s 1 ? s 2 ) connection diagram dip (top view) 15 16 14 13 12 11 10 2 1 3 4 5 6 7 v cc 9 8 i 4 i 5 i 6 i 7 s 0 s 1 s 2 i 3 i 2 i 1 i 0 z z e gnd logic diagram s 2 s 1 s 0 e z z i 0 i 1 i 2 i 3 i 4 i 5 i 6 i 7 function table inputs outputs e s 2 s 1 s 0 z z h x x x h l l l l l i 0 i 0 l l l h i 1 i 1 l l h l i 2 i 2 l l h h i 3 i 3 l h l l i 4 i 4 l h l h i 5 i 5 l h h l i 6 i 6 l h h h i 7 i 7 h = high v oltage level; l = low v oltage level; x = don't care mc54fxxxj ceramic mc74fxxxn plastic mc74fxxxd soic mc54/74f151 8-input multiplexer fast ? shottky ttl j suffix ceramic case 620-09 n suffix plastic case 648-08 16 1 16 1 ordering information 16 1 d suffix soic case 751b-03 logic symbol v cc = pin 16 gnd = pin 8 12 13 14 15 1 2 3 4 7 5 6 11 10 9 s 2 s 1 s 0 e z z i 0 i 1 i 2 i 3 i 4 i 5 i 6 i 7
4-63 fast and ls ttl data mc54/74f151 guaranteed operating ranges symbol parameter min typ max unit v cc supply voltage 54, 74 4.5 5.0 5.5 v t a operating ambient temperature range 54 55 25 125 c 74 0 25 70 i oh output current e high 54, 74 1.0 ma i ol output current e low 54, 74 20 ma dc characteristics over operating temperature range (unless otherwise specified) limits symbol parameter min typ max unit test conditions v ih input high voltage 2.0 v guaranteed input high voltage v il input low voltage 0.8 v guaranteed input low voltage v ik input clamp diode voltage 1.2 v i in = 18 ma v cc = min v oh output high voltage 54, 74 2.5 3.4 v i oh = 1.0 ma v cc = 4.50 v 74 2.7 3.4 v i oh = 1.0 ma v cc = 4.75 v v ol output low voltage 0.35 0.5 v i ol = 20 ma v cc = min i ih input high current 20 m a v cc = max, v in = 2.7 v 100 m a v cc = max, v in = 7.0 v i il input low current 0.6 ma v cc = max, v in = 0.5 v i os output short circuit current (note 2) 60 150 ma v cc = max, v out = 0 v i cc power supply current 13.5 21 ma v cc = max, v in = 4.5 v notes: 1. for conditions shown as min or max, use the appropriate value specified under guaranteed operating ranges. 2. not more than one output should be shorted at a time, nor for more than 1 second. ac characteristics 54/74f 54f 74f t a = +25 c v cc = +5.0 v c l = 50 pf t a = 55 c to +125 c v cc = 5.0 v 10% c l = 50 pf t a = 0 c to 70 c v cc = 5.0 v 10% c l = 50 pf symbol parameter min max min max min max unit t plh propagation delay 4.0 8.0 3.5 10 3.5 9.0 ns t phl s n to z 3.2 6.1 3.0 8.0 3.2 7.0 ns t plh propagation delay 4.5 13 3.0 17.5 4.0 14 ns t phl s n to z 4.5 9.0 4.0 11.5 4.0 10.5 ns t plh propagation delay 3.0 6.1 2.5 7.5 2.5 7.0 ns t phl e to z 3.0 8.5 2.5 10.5 2.5 10 ns t plh propagation delay 5.0 9.5 3.0 14.5 4.0 11 ns t phl e to z 3.5 7.0 3.0 9.5 3.5 8.0 ns t plh propagation delay 2.5 5.7 2.5 7.5 2.5 6.5 ns t phl i n to z 1.5 4.0 1.5 6.0 1.5 5.0 ns t plh propagation delay 3.0 9.5 2.5 11.5 2.5 11 ns t phl i n to z 3.0 6.5 3.0 8.0 3.0 7.5 ns
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