《元器件》74LS154.【GHOE].pdf

TL F 6394 DM54LS154 DM74LS154 4 Line to 16 Line Decoders Demultiplexers May 1989 DM54LS154 DM74LS154 4 Line to 16 Line Decoders Demultiplexers General Description Each of these 4 line to 16 line decoders utilizes TTL circuit ry to decode four binary coded inputs into one of sixteen mutually exclusive outputs when both the strobe inputs G1 and G2 are low The demultiplexing function is performed by using the 4 input lines to address the output line passing data from one of the strobe inputs with the other strobe input low When either strobe input is high all outputs are high These demultiplexers are ideally suited for implement ing high performance memory decoders All inputs are buff ered and input clamping diodes are provided to minimize transmission line effects and thereby simplify system de sign Features YDecodes 4 binary coded inputs into one of 16 mutually exclusive outputs YPerforms the demultiplexing function by distributing data from one input line to any one of 16 outputs YInput clamping diodes simplify system design YHigh fan out low impedance totem pole outputs YTypical propagation delay 3 levels of logic 23 ns Strobe 19 ns YTypical power dissipation 45 mW Connection and Logic Diagrams Dual In Line Package TL F 6394 1 Order Number DM54LS154J DM74LS154WM or DM74LS154N See NS Package Number J24A M24B or N24A TL F 6394 2 C1995 National Semiconductor Corporation RRD B30M105 Printed in U S A Absolute Maximum Ratings Note If Military Aerospace specified devices are required pleasecontacttheNationalSemiconductorSales Office Distributors for availability and specifications Supply Voltage7V Input Voltage7V Operating Free Air Temperature Range DM54LS b55 C toa125 C DM74LS0 C toa70 C Storage Temperature Range b65 C toa150 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 operation Recommended Operating Conditions SymbolParameter DM54LS154DM74LS154 Units MinNomMaxMinNomMax VCCSupply Voltage4 555 54 7555 25V VIHHigh Level Input Voltage22V VILLow Level Input Voltage0 70 8V IOHHigh Level Output Current b0 4b0 4 mA IOLLow Level Output Current48mA TAFree Air Operating Temperature b55 125070 C Electrical Characteristicsover recommended operating free air temperature range unless otherwise noted SymbolParameterConditionsMin Typ MaxUnits Note 1 VIInput Clamp VoltageVCCeMin IIe b18 mA b1 5 V VOHHigh Level OutputVCCeMin IOHeMaxDM542 53 4 V VoltageVILeMax VIHeMin DM742 73 4 VOLLow Level OutputVCCeMin IOLeMaxDM540 250 4 VoltageVILeMax VIHeMin DM740 350 5V IOLe4 mA VCCeMinDM740 250 4 IIInput Current MaxVCCeMax VIe7V 0 1mA Input Voltage IIHHigh Level Input CurrentVCCeMax VIe2 7V20mA IILLow Level Input CurrentVCCeMax VIe0 4V b0 4 mA IOSShort CircuitVCCeMaxDM54 b20b100 mA Output Current Note 2 DM74 b20b100 ICCSupply CurrentVCCeMax Note 3 914mA Note 1 All typicals are at VCCe5V TAe25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second Note 3 ICCis measured with all outputs open and all inputs grounded Switching Characteristicsat VCCe5V and TAe25 C See Section 1 for Test Waveforms and Output Load From Input RLe2 kX SymbolParameterTo Output CLe15 pFCLe50 pFUnits MinMaxMinMax tPLHPropagation Delay TimeData to 3035ns Low to High Level OutputOutput tPHLPropagation Delay TimeData to 3035ns High to Low Level OutputOutput tPLHPropagation Delay TimeStrobe to 2025ns Low to High Level OutputOutput tPHLPropagation Delay TimeStrobe to 2535ns High to Low Level OutputOutput 2 Function Table InputsOutputs G1G2DCBA0123456789101112131415 LLLLLLLHHHHHHHHHHHHHHH LLLLLHHLHHHHHHHHHHHHHH LLLLHLHHLHHHHHHHHHHHHH LLLLHHHHHLHHHHHHHHHHHH LLLHLLHHHHLHHHHHHHHHHH LLLHLHHHHHHLHHHHHHHHHH LLLHHLHHHHHHLHHHHHHHHH LLLHHHHHHHHHHLHHHHHHHH LLHLLLHHHHHHHHLHHHHHHH LLHLLHHHHHHHHHHLHHHHHH LLHLHLHHHHHHHHHHLHHHHH LLHLHHHHHHHHHHHHHLHHHH LLHHLLHHHHHHHHHHHHLHHH LLHHLHHHHHHHHHHHHHHLHH LLHHHLHHHHHHHHHHHHHHLH LLHHHHHHHHHHHHHHHHHHHL LHXXXXHHHHHHHHHHHHHHHH HLXXXXHHHHHHHHHHHHHHHH HHXXXXHHHHHHHHHHHHHHHH HeHigh Level LeLow Level XeDon t Care 3 4 Physical Dimensionsinches millimeters 24 Lead Ceramic Dual In Line Package J Order Number DM54LS154J NS Package Number J24A 24 Lead Wide Small Outline Molded Package M Order Number DM74LS154WM NS Package Number M24B 5 DM54LS154 DM74LS154 4 Line to 16 Line Decoders Demultiplexers Physical Dimensionsinches millimeters Continued 24 Lead Molded Dual In Line Package N Order Number DM74LS154N NS Package Number N24A LIFE SUPPORT POLICY NATIONAL 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 Lifesupportdevicesorsystemsared。