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MC74FXXD Datenblatt(PDF) 1 Page - Motorola, Inc |
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MC74FXXD Datenblatt(HTML) 1 Page - Motorola, Inc |
1 / 3 page 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 effectively 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. VCC GND 13 14 12 11 10 9 8 2 1 3 4 5 6 7 VCC 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 VCC Supply Voltage 54, 74 4.5 5.0 5.5 V TA Operating Ambient Temperature Range 54 –55 25 125 °C 74 0 25 70 IOH Output Current — High 54, 74 –1.0 mA IOL Output Current — 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 |
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