74273 TTL 带公共时钟复位八D触发器

1、 DM74LS273 8-Bit RegGeneral DescriptionFeaturesEdge-triggeredss 8-bit high speed registers Parallel in and outsCommon clock and master resetOrdering Code:Order Number Package NumberPackage DescriptionDM74LS273WMDM74LS273SJDM74LS273NM20BM20DN20A20-Lead Small Outline Integrated Circuit (SOIC), JEDEC M

2、S-013, 0.300 Wide20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 WideDevices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.Logic SymbolConnection DiagramCCVTruth TablePin

3、DescriptionsOutputsQnClock Pulse Input (Active Rising Edge)Data InputsXXHLLHLD0D7MRH = HIGH Voltage LevelL = LOW Voltage LevelX = Immaterial 2000 Fairchild Semiconductor CorporationDS009825 37 Functional Description2SLThe DM74LS273 is an 8-bit parallel register with a commonClock and common Master R

4、eset. When the MR input isLOW, the Q outputs are LOW, independent of the otherinputs. Information meeting the setup and hold timerequirements of the D inputs is transferred to the Q outputson the LOW-to-HIGH transition of the clock input.47MD2 DM74LS273Note 1: The “Absolute Maximum Ratings” are thos

5、e values beyond whichthe safety of the device cannot be guaranteed. The device should not beoperated at these limits. The parametric values defined in the ElectricalCharacteristics tables are not guaranteed at the absolute maximum ratings.The “Recommended Operating Conditions” table will define the

6、conditionsfor actual device operation.Operating Free Air Temperature RangeStorage Temperature Range65C to +150CRecommended Operating ConditionsSymbolParameterMin4.752NomMaxUnitsVSupply Voltage55.25VV70t (H)Snsnsnst (L)D to CPSnt (H)Hold Time HIGH or LOWHt (L)D to CP5Hnt (H)CP Pulse Width HIGH or LOW

7、2020WWWElectrical CharacteristicsOver recommended operating free air temperature range (unless otherwise noted)SymbolInput Clamp VoltageVCC = Min, I = 18 mAVCC = Min, IOH = Max,VIL = Max1.5VVIHIGH Level2.73.4CC0.5VInput Current Max Input VoltageHIGH Level Input CurrentLOW Level Input CurrentShort Ci

8、rcuit Output CurrentSupply CurrentI20II20Note 2: All typicals are at VCCSwitching CharacteristicsVCC = +5.0V, T =+25CALSymbolLMaximum Clock Frequency30MHznsPropagation Delay27nsMR to Qn3 37 Physical Dimensions2inches (millimeters) unless otherwise notedSL47MD20-Lead Small Outline Integrated Circuit

9、(SOIC), JEDEC MS-013, 0.300 WidePackage Number M20B4 DM74LS273inches (millimeters) unless otherwise noted (Continued)20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm WidePackage Number M20D5 raeinches (millimeters) unless otherwise noted (Continued)lChtiwretsigeRtiB-8372SL47MDFairchild does

10、not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied andFairchild reserves the right at any time without notice to change said circuitry and specifications.LIFE SUPPORT POLICYFAIRCHILDS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN

11、LIFE SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILDSEMICONDUCTOR 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