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SN74LS14N
SN54/74LS13 SN54/74LS14 SCHMITT TRIGGERS DUAL GATE/HEX INVERTER The SN54LS / 74LS13 and SN54LS / 74LS14 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. SCHMITT TRIGGERS DUAL GATE/ HEX INVERTER LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 632-08 14 LOGIC AND CONNECTION DIAGRAMS SN54 / 74LS13 VCC 14 1 13 12 11 10 9 8 N SUFFIX PLASTIC CASE 646-06 14 1 1 2 3 4 5 6 7 14 GND 1 SN54 / 74LS14 VCC 14 13 12 11 10 9 ORDERING INFORMATION 8 SN54LSXXJ SN74LSXXN SN74LSXXD 1 D SUFFIX SOIC CASE 751A-02 2 3 4 5 6 Ceramic Plastic SOIC 7 GND GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 – 55 0 25 25 125 70 °C IOH Output Current — High 54, 74 – 0.4 mA IOL Output Current — Low 54 74 4.0 8.0 mA FAST AND LS TTL DATA 5-1
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