MC74HCT20A Dual 4-Input NAND Gate with LSTTL-Compatible Inputs HighPerformance SiliconGate CMOS MC74HCT20A 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 fields. However, precautions must in CC 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 cir- in cuit. For proper operation, V and in I DC Output Current, per Pin 25 mA out V should be constrained to the out I DC Supply Current, V and GND Pins 50 mA range GND (V or V ) V . 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 65 to +150 C stg Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. RECOMMENDED OPERATING CONDITIONS SymbolParameter Min MaxUnit V DC Supply Voltage (Referenced to GND) 4.5 5.5 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 (Figure 1) 0 500 ns r f DC CHARACTERISTICS (Voltages Referenced to GND) Guaranteed Limit V CC Symbol Parameter Condition V 55 to 25C 85C 125C Unit V Minimum HighLevel Input Voltage V = 0.1V 4.5 2.0 2.0 2.0 V IH out I 20 A 5.5 2.0 2.0 2.0 out V Maximum LowLevel Input Voltage V = V 0.1V 4.5 0.8 0.8 0.8 V IL out CC I 20 A 5.5 0.8 0.8 0.8 out V Minimum HighLevel Output V = V 4.5 4.4 4.4 4.4 V OH in IL Voltage I 20 A 5.5 5.4 5.4 5.4 out V = V I 4.0mA 4.5 3.98 3.84 3.70 in IL out V Maximum LowLevel Output V = V 4.5 0.1 0.1 0.1 V OL in IH Voltage I 20 A 5.5 0.1 0.1 0.1 out V = V I 4.0mA 4.5 0.26 0.33 0.40 in IH out I Maximum Input Leakage Current V = V or GND 5.5 0.1 1.0 1.0 A in in CC I Maximum Quiescent Supply V = V or GND 5.5 1 10 40 A CC in CC Current (per Package) I = 0 A out I Additional Quiescent Supply V = 2.4V, Any One Input CC in 55C 25 to 125C = V or GND, Other Inputs Current V in CC 2.9 2.4 mA I = 0 A 5.5 out 1. Information on typical parametric values can be found in Chapter 2 of the ON Semiconductor High Speed CMOS Data Book (DL129/D). 2. Total Supply Current = I + I . CC CC