9314中文资料
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TL F 97889314 DM9314 Quad LatchJune19899314 DM9314Quad LatchGeneral DescriptionThe’9314is a multifunctional4-bit latch designed for gener-al purpose storage applications in high speed digital sys-tems All outputs have active pull-up circuitry to provide highcapacitance drive and to provide low impedance in bothlogic states for good noise immunityConnection DiagramDual-In-Line PackageTL F 9788–1Order Number9314DMQB 9314FMQB or DM9314NSee NS Package Number J16A N16E or W16ALogic SymbolTL F 9788–2V CC e Pin16GND e Pin8Pin Names DescriptionE Enable Input(Active LOW)D0–D3Data InputsS0–S3Set Inputs(Active LOW)MR Master Reset Input(Active LOW)Q0–Q3Latch OutputsC1995National Semiconductor Corporation RRD-B30M115 Printed in U S AAbsolute Maximum Ratings(Note)If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage7V Input Voltage5 5V Operating Free Air Temperature RangeMilitary b55 C to a125 C Commercial0 C to a70 C Storage Temperature Range b65 C to a150 C Note The‘‘Absolute Maximum Ratings’’are those values beyond which the safety of the device cannot be guaran-teed The device should not be operated at these limits The parametric values defined in the‘‘Electrical Characteristics’’table are not guaranteed at the absolute maximum ratings The‘‘Recommended Operating Conditions’’table will define the conditions for actual device operationRecommended Operating ConditionsSymbol ParameterMilitary CommercialUnits Min Nom Max Min Nom MaxV CC Supply Voltage4 555 54 7555 25VV IH High Level Input Voltage22VV IL Low Level Input Voltage0 80 8VI OH High Level Output Current b0 8b0 8mAI OL Low Level Output Current1616mAT A Free Air Operating Temperature b55125070 C t s(H)Setup Time HIGH or LOW5 05 0ns t s(L)D n to E1818t h(H)Hold Time HIGH or LOW00ns t h(L)D n to E5 05 0t s(H)Setup Time HIGH D n to S n8 08 0nst h(L)Hold Time LOW D n to S n8 08 0nst w(L)E Pulse Width LOW1818nst w(L)MR Pulse Width LOW1818nst rec Recovery Time MR to E00ns Electrical CharacteristicsOver recommended operating free air temperature range(unless otherwise noted)Symbol Parameter Conditions MinTypMax Units (Note1)V I Input Clamp Voltage V CC e Min I I e b12mA b1 5VV OH High Level Output Voltage V CC e Min I OH e Max2 43 4VV IL e MaxV OL Low Level Output Voltage V CC e Min I OL e Max0 20 4VV IH e MinI I Input Current Max V CC e Min V I e5 5V1mA Input VoltageI IH High Level Input Current V CC e Max V I e2 4V40m AData Inputs60I IL Low Level Input Current V CC e Max V I e0 4V b1 6mAData Inputs b2 7I OS Short Circuit V CC e Max MIL b20b70mA Output Current(Note2)COM b20b70I CC Supply Current V CC e Max55mA Note1 All typicals are at V CC e5V T A e25 CNote2 Not more than one output should be shorted at a time2Switching Characteristics V CC e a5 0V T A e a25 C(See Section1for waveforms and load configurations)Symbol ParameterC L e15pFUnits Min Maxt PLH Propagation Delay24ns t PHL E to Q n24t PLH Propagation Delay12ns t PHL D n to Q n24t PLH Propagation Delay18ns MR to Q nt PHL Propagation Delay24ns S n to Q nFunctional DescriptionThe’9314consists of four latches with a common active LOW Enable input and active LOW Master Reset input When the Enable goes HIGH data present in the latches is stored and the state of the latch is no longer affected by the S n and D n inputs The Master Reset when activated over-rides all other input conditions forcing all latch outputs LOW Each of the four latches can be operated in one of two modesD-TYPE LATCH For D-type operation the S input of a latch is held LOW While the common Enable is active the latch output follows the D input Information present at the latch output is stored in the latch when the Enable goes HIGH SET RESET LATCH During set reset operation when the common Enable is LOW a latch is reset by a LOW on the D input and can be set by a LOW on the S input if the D input is HIGH If both S and D inputs are LOW the D input will dominate and the latch will be reset When the Enable goes HIGH the latch remains in the last state prior to disable-ment The two modes of latch operation are shown in the Truth TableTruth TableMR E D S Q n OperationH L L L L D ModeH L H L HH H X X Q n b1H L L L L R S ModeH L H L HH L L H LH L H H Q n b1H H X X Q n b1L X X X L ResetH e HIGH Voltage LevelL e LOW Voltage LevelX e ImmaterialQ n b1e Previous Output StateQ n e Present Output State3Logic DiagramTL F 9788–34Physical Dimensions inches(millimeters)16-Lead Ceramic Dual-In-Line Package(J)Order Number9314DMQBNS Package Number J16A16-Lead Molded Dual-In-Line Package(N)Order Number DM9314NNS Package Number N16E59314 D M 9314Q u a d L a t c hPhysical Dimensions inches (millimeters)(Continued)16-Lead Ceramic Flat Package (W)Order Number 9314FMQB NS Package Number W16ALIFE SUPPORT POLICYNATIONAL’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 NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or 2 A critical component is any component of a life systems which (a)are intended for surgical implant support device or system whose failure to perform can into the body or (b)support or sustain life and whose be reasonably expected to cause the failure of the life failure to perform when properly used in accordance support device or system or to affect its safety or with instructions for use provided in the labeling can effectivenessbe reasonably expected to result in a significant injury to the userNational Semiconductor National Semiconductor National Semiconductor National Semiconductor CorporationEuropeHong Kong LtdJapan Ltd1111West Bardin RoadFax (a 49)0-180-530858613th Floor Straight Block Tel 81-043-299-2309。
