SN54LS13

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. LOGIC AND CONNECTION DIAGRAMS VCC 14 13 SN54 / 74LS13 12 11 10 9 8 SN54/74LS13 SN54/74LS14 SCHMITT TRIGGERS DUAL GATE/ HEX INVERTER LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 632-08 14 1 14 1 N SUFFIX PLASTIC CASE 646-06 1 2 3 4 5 6 7 GND 14 1 D SUFFIX SOIC CASE 751A-02 VCC 14 13 SN54 / 74LS14 12 11 10 9 8 ORDERING INFORMATION SN54LSXXJ SN74LSXXN SN74LSXXD Ceramic Plastic SOIC 1 2 3 4 5 6 7 GND GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current — High Output Current — Low Parameter 54 74 54 74 5...