4-64 fast and ls ttl data dual 4-input multiplexer the mc54/74f153 is a high-speed dual 4-input multiplexer with common select inputs and individual enable inputs for each section. it can select two lines of data from four sources. the two buf fered outputs present data in the true (non-inverted) form. in addition to multiplexer operation, the f153 can generate any two functions of three variables. connection diagram dip (top view) 15 16 14 13 12 11 10 2 1 3 4 5 6 7 v cc 9 8 e b s 0 i 3b i 2b i 1b i 0b z b e a s 1 i 3a i 2a i 1a i 0a z a gnd logic diagram v cc = pin 16 gnd = pin 8 = pin numbers e b e a z a z b i 0a i 1a i 2a i 3a s 1 s 0 i 0b i 1b i 2b i 3b 6 5 1 2 3 4 10 11 12 13 14 15 7 9 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 mc54fxxxj ceramic mc74fxxxn plastic mc74fxxxd soic mc54/74f153 dual 4-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
4-65 fast and ls ttl data mc54/74f153 functional description the mc54/74f153 is a dual 4-input multiplexer. it can se- lect two bits of data from up to four sources under the control of the common select inputs (s 0 , s 1 ). the two 4-input multi - plexer circuits have individual active low enables (e a , e b ) which can be used to strobe the outputs independently . when the enables (e a , e b ) are high, the corresponding outputs (z a , z b ) are forced low. the f153 is the logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic levels supplied to the two select inputs. the logic equa - tions for the outputs are shown below: z a = e a ? (i 0a ? s 1 ? s 0 + i 1a ? s 1 ? s 0 + i 2a ? s 1 ? s 0 + i 3a ? s 1 ? s 0 ) z b = e b ? (i 0b ? s 1 ? s 0 + i 1b ? s 1 ? s 0 + i 2b ? s 1 ? s 0 + i 3b ? s 1 ? s 0 ) the f153 can be used to move data from a group of regis - ters to a common output bus. the particular register from which the data came would be determined by the state of the select inputs. a less obvious application is as a function gen - erator. the f153 can generate two functions of three vari - ables. this is useful for implementing highly irregular random logic. function table select inputs inputs (a or b) output s 0 s 1 e i 0 i 1 i 2 i 3 z x x h x x x x l l l l l x x x l l l l h x x x h h l l x l x x l h l l x h x x h l h l x x l x l l h l x x h x h h h l x x x l l h h l x x x h h h = high v oltage level; l = low v oltage level; x = don't care 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 v i ol = 1.0 ma v cc = 4.50v 74 2.7 v i ol = 1.0 ma v cc = 4.75 v v ol output low voltage 0.5 v i ol = 20 ma v cc = min i ih input high current 20 m a v in = 2.7 v, v cc = max 0.1 ma v in = 7.0 v, v cc = max i il input low current 0.6 ma v in = 0.5 v, v cc = max i os output short circuit current (note 2) 60 150 ma v out = 0 v, v cc = max i cc power supply current 20 ma v in = gnd, v cc = max notes: 1. for conditions shown as min or max, use the appropriate value specified under recommended operating conditions for the applicable device type. 2. not more than one output should be shorted at a time, nor for more than 1 second.
4-66 fast and ls ttl data mc54/74f153 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 4.5 10.5 4.5 14 4.5 12 ns t phl s n to z n 3.5 9.0 3.5 11 3.5 10.5 t plh propagation delay 4.5 9.0 4.5 11.5 4.5 10.5 ns t phl e n to z n 3.0 7.0 2.5 9.0 2.5 8.0 t plh propagation delay 3.0 7.0 2.5 9.0 3.0 8.0 ns t phl i n to z n 3.0 6.5 2.5 8.0 2.5 7.5
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