器件名称: 74F14
功能描述: SCHMITT TRIGGERS DUAL 4-INPUT NAND/HEX INVERTERS
文件大小: 54.12KB 共3页
简 介: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 IO……
