74F14

SCHMITT TRIGGERS DUAL 4-INPUT NAND/HEX INVERTERS The MC54/74F13 and MC54/74F14 contain logic gates/inverters which accept standard TTL input signals and provide standard TTL output levels. They are capable of transforming slowly changing input signals into sharply defined, 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 thresholds (typically 800 mV) is determined internally by resistor ratios and is essentially insensitive to temperature and supply voltage variations. LOGIC AND CONNECTION DIAGRAMS 14 MC54/74F13 MC54/74F14 SCHMITT TRIGGERS DUAL 4-INPUT NAND/HEX INVERTERS FAST™ SCHOTTKY TTL J SUFFIX CERAMIC CASE 632-08 1 MC54/74F13 VCC 14 D 13 C 12 N/C 11 B 10 A 9 O 8 14 1 N SUFFIX PLASTIC CASE 646-06 1 A 2 B 3 N/C 4 C 5 D 6 O 7 GND 14 1 D SUFFIX SOIC CASE 751A-02 MC54/74F14 VCC 14 A 13 O 12 A 11 O 10 A 9 O 8 ORDERING INFORMATION MC54FXXJ MC74FXXN MC74FXXD Ceramic Plastic SOIC 1 A 2 O 3 A 4 O 5 A 6 O 7 GND GUARANTEED OPERATING RANGES Symbol VCC TA Supply Voltage Operating Ambient Temperature Range Parameter 54, 74 54 74 IOH I...