MC74HC14A Hex Schmitt-Trigger Inverter HighPerformance SiliconGate CMOS The MC74HC14A is identical in pinout to the LS14, LS04 and the MC74HC14A MAXIMUM RATINGS Symbol Parameter Value Unit This device contains protection circuitry to guard against damage V DC Supply Voltage (Referenced to GND) 0.5 to +7.0 V CC due to high static voltages or electric V DC Input Voltage (Referenced to GND) 0.5 to V + 0.5 V in CC fields. However, precautions must be taken to avoid applications of any V DC Output Voltage (Referenced to GND) 0.5 to V + 0.5 V out CC voltage higher than maximum rated I DC Input Current, per Pin 20 mA voltages to this highimpedance in circuit. For proper operation, V and in I DC Output Current, per Pin 25 mA out V should be constrained to the out range GND (V or V ) V . I DC Supply Current, V and GND Pins 50 mA in out CC CC CC Unused inputs must always be P Power Dissipation in Still Air, SOIC Package 500 mW D tied to an appropriate logic voltage TSSOP Package 450 level (e.g., either GND or V ). CC Unused outputs must be left open. T Storage Temperature Range 65 to +150 C stg T Lead Temperature, 1 mm from Case for 10 Seconds C L Plastic DIP, SOIC or TSSOP Package 260 Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Derating: SOIC Package: 7 mW/ C from 65 to 125 C TSSOP Package: 6.1 mW/ C from 65 to 125 C RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit V DC Supply Voltage (Referenced to GND) 2.0 6.0 V CC V , V DC Input Voltage, Output Voltage (Referenced to GND) 0 V V in out CC T Operating Temperature Range, All Package Types 55 +125 C A t , t Input Rise/Fall Time V = 2.0 V 0 No Limit* ns r f CC (Figure 1) V = 4.5 V 0 No Limit* CC V = 6.0 V 0 No Limit* CC Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. *When V = 50% V , I > 1mA in CC CC