4-14 fast and ls ttl data schmitt triggers dual 4-input nand/hex inverters the mc54/74f13 and mc54/74f14 contain logic gates/inverters which ac - cept standard ttl input signals and provide standard ttl output levels. they are capable of transforming slowly changing input signals into sharply de - fined, jitter-free output signals. additionally , they have greater noise margin than conventional inverters. each circuit contains a schmitt trigger followed by a darlington level shifter and a phase splitter driving a ttl totem pole output. the schmitt trigger uses positive feedback to ef fectively speed up slow input transitions and provide different input threshold voltages for positive and negative-going transitions. this hysteresis between the positive-going and negative-going input thresh - olds (typically 800 mv) is determined internally by resistor ratios and is essen - tially insensitive to temperature and supply voltage variations. v cc gnd 13 14 12 11 10 9 8 2 1 3 4 5 6 7 v cc gnd 13 14 12 11 10 9 8 2 1 3 4 5 6 7 mc54/74f13 mc54/74f14 logic and connection diagrams d c n/c b a o a b n/c c d o a o a o a o a o a o a o 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 mc54fxxj ceramic mc74fxxn plastic mc74fxxd soic d suffix soic case 751a-02 n suffix plastic case 646-06 j suffix ceramic case 632-08 mc54/74f13 mc54/74f14 schmitt triggers dual 4-input nand/hex inverters fast ? schottky ttl 14 1 14 1 ordering information 14 1
4-15 fast and ls ttl data mc54/74f13 ? mc54/74f14 dc characteristics over operating temperature range (unless otherwise specified) limits symbol parameter min typ max unit test conditions v t + positive-going threshold voltage 1.5 2.0 v v cc = 5.0 v v t negative-going threshold voltage 0.7 1.1 v v cc = 5.0 v v t +v t hysteresis 0.4 0.8 v v cc = 5.0 v 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 v cc = min, i in = 18 ma v oh output high voltage 54, 74 2.5 v i oh = 1.0 ma v cc = 4.5 74 2.7 v i oh = 1.0 ma v cc = 4.75 v ol output low voltage 0.5 v i ol = 20 ma v cc = min i t + input current at positive-going threshold 0.14 ma v cc = 5.0 v, v in = v t + i t input current at negative-going threshold 0.18 ma v cc = 5.0 v, v in = v t i ih input high current 20 m a v cc = max, v in = 2.7 v 0.1 ma 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 cch power supply current f13 4.5 8.5 v cc = max total, output high f14 13 22 ma v cc = max i ccl power supply current f13 7.0 10 ma v cc = max total, output low f14 23 32 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. ac characteristics (c l = 50 pf) 54/74f 54f 74f t a = +25 c t a = 55 c to +125 c t a = 0 c to 70 c v cc = +5.0 v v cc = 5.0 v 10% v cc = 5.0 v 10% symbol parameter min max min max min max unit t plh propagation delay f13 3.5 7.0 3.5 9.0 3.5 8.0 ns t phl 3.0 8.0 3.0 9.5 3.0 8.5 t plh propagation delay f14 3.5 7.0 3.5 9.0 3.5 8.0 ns t phl 3.0 6.5 3.0 8.0 3.0 7.0
4-16 fast and ls ttl data mc54/74f13 ? mc54/74f14 input output a o l h h l function table mc54/74f14 function table mc54/74f13 inputs output l x x x h x l x x h x x l x h x x x l h h h h h l a b c d o h = high voltage level l = low voltage level x = don't care
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