74ls14 六倒相器(斯密特触发)

© 2000 Fairchild Semiconductor Corporation DS006353August 1986Revised March 2000DM74LS14 Hex Inverter with Schmitt Trigger Inputs DM74LS14Hex Inverter with Schmitt Trigger InputsGeneral DescriptionThis device contains six independent gates each of whichperforms the logic INVERT function. Each input has hyster-esis which increases the noise immunity and transforms aslowly changing input signal to a fast changing, jitter freeoutput.Ordering Code:Devices also available in T ape and Reel. Specify by appending the suffix letter “X” to the ordering code.Connection Diagram Function TableY = AH = HIGH Logic LevelL = LOW Logic Level Order NumberPackage Number Package Description DM74LS14MM14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow DM74LS14SJM14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74LS14N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide InputOutput AY LH HL 2D M 74L S 14Absolute Maximum Ratings(Note 1)Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings.The “Recommended Operating Conditions” table will define the conditions for actual device operation.Recommended Operating ConditionsNote 2: V CC = 5V.Electrical Characteristicsover recommended operating free air temperature range (unless otherwise noted)Note 3: All typicals are at V CC = 5V, T A = 25°C.Note 4: Not more than one output should be shorted at a time, and the duration should not exceed one second.Switching Characteristicsat V CC = 5V and T A = 25°CSupply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range0°C to +70°C Storage Temperature Range −65°C to +150°C SymbolParameter Min Nom Max Units V CCSupply Voltage 4.755 5.25V V T +Positive-Going Input Threshold Voltage (Note 2) 1.4 1.6 1.9V V T −Negative-Going Input Threshold Voltage (Note 2)0.50.81V HYSInput Hysteresis (Note 2)0.40.8V I OHHIGH Level Output Current −0.4mA I OLLOW Level Output Current 8mA T AFree Air Operating Temperature 070°C SymbolParameter Conditions Min Typ Max Units (Note 3)V IInput Clamp Voltage V CC = Min, I I = −18 mA −1.5V V OHHIGH Level V CC = Min, I OH = Max 2.7 3.4V Output VoltageV IL = Max V OL LOW Level V CC = Min, I OL = Max 0.350.5Output VoltageV IH = Min V V CC = Min, I OL = 4 mA 0.250.4I T +Input Current at V CC = 5V, V I = V T +−0.14mA Positive-Going Threshold I T −Input Current at V CC = 5V, V I = V T −−0.18mA Negative-Going Threshold I IInput Current @ Max Input Voltage V CC = Max, V I = 7V 0.1mA I IHHIGH Level Input Current V CC = Max, V I = 2.7V 20µA I ILLOW Level Input Current V CC = Max, V I = 0.4V −0.4mA I OSShort Circuit Output Current V CC = Max (Note 4)−20−100mA I CCHSupply Current with Outputs HIGH V CC = Max 8.616mA I CCL Supply Current with Outputs LOW V CC = Max 1221mA R L = 2 k ΩSymbolParameter C L = 15 pF C L = 50 pF Units Min Max Min Max t PLHPropagation Delay Time 522825ns LOW-to-HIGH Level Output t PHL Propagation Delay Time5221033ns HIGH-to-LOW Level OutputDM74LS14Physical Dimensionsinches (millimeters) unless otherwise noted14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 NarrowPackage Number M14A 4D M 74L S 14Physical Dimensions inches (millimeters) unless otherwise noted (Continued)14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M14DDM74LS14 Hex Inverter with Schmitt Trigger InputsPhysical Dimensions inches (millimeters) unless otherwise noted (Continued)14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 WidePackage Number N14AFairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.LIFE SUPPORT POLICYFAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:1.Life support devices or systems are devices or systemswhich, (a) are intended for surgical implant into thebody, or (b) support or sustain life, and (c) whose failureto perform when properly used in accordance withinstructions for use provided in the labeling, can be rea-sonably expected to result in a significant injury to theuser.2. A critical component in any component of a life support device or system whose failure to perform can be rea-sonably expected to cause the failure of the life support device or system, or to affect its safety or 。