经典PC案例文件 3G超大 电子学习资料 电子设计资料补充 资料库 芯片资料2 74系列芯片总汇 74LS83

TL F 6378 54LS83A DM54LS83A DM74LS83A 4 Bit Binary Adders with Fast Carry May 1989 54LS83A DM54LS83A DM74LS83A 4 Bit Binary Adders with Fast Carry General Description These full adders perform the addition of two 4 bit binary numbers The sum R outputs are provided for each bit and the resultant carry C4 is obtained from the fourth bit These adders feature full internal look ahead across all four bits This provides the system designer with partial look ahead performance at the economy and reduced package count of a ripple carry implementation The adder logic including the carry is implemented in its true form meaning that the end around carry can be accom plished without the need for logic or level inversion Features YFull carry look ahead across the four bits YSystems achieve partial look ahead performance with the economy of ripple carry YTypical add times Two 8 bit words 25 ns Two 16 bit words 45 ns YTypical power dissipation per 4 bit adder 95 mW YAlternate Military Aerospace device 54LS83A is avail able Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual In Line Package TL F 6378 1 Order Number 54LS83ADMQB 54LS83AFMQB DM54LS83AJ DM54LS83AW DM74LS83AWM or DM74LS83AN See NS Package Number J16A M16B N16E or W16A 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 and 54LS 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 DM54LS83ADM74LS83A 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 MaxVCCeMaxA or B0 2 mA Input VoltageVIe7V C00 1 IIHHigh Level InputVCCeMaxA or B40 mA CurrentVIe2 7V C020 IILLow Level InputVCCeMaxA or B b0 8 mA CurrentVIe0 4V C0 b0 4 IOSShort CircuitVCCeMaxDM54 b20b100 mA Output Current Note 2 DM74 b20b100 ICC1Supply CurrentVCCeMax Note 3 1934mA ICC2Supply CurrentVCCeMax Note 4 2239mA 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 ICC1is measured with all outputs open all B inputs low and all other inputs at 4 5V or all inputs at 4 5V Note 4 ICC2is measured with all outputs open and all inputs grounded 2 Switching Characteristicsat VCCe5V and TAe25 C See Section 1 for Test Waveforms and Output Load From Input RLe2 kX SymbolParameter To Output CLe15 pFCLe50 pFUnits MinMaxMinMax tPLHPropagation Delay TimeC0 to 2428ns Low to High Level OutputR1 or R2 tPHLPropagation Delay TimeC0 to 2430ns High to Low Level OutputR1 or R2 tPLHPropagation Delay TimeC0 to 2428ns Low to High Level OutputR3 tPHLPropagation Delay TimeC0 to 2430ns High to Low Level OutputR3 tPLHPropagation Delay TimeC0 to 2428ns Low to High Level OutputR4 tPHLPropagation Delay TimeC0 to 2430ns High to Low Level OutputR4 tPLHPropagation Delay TimeAi Bi 2428ns Low to High Level Outputto Ri tPHLPropagation Delay TimeAi Bi 2430ns High to Low Level Outputto Ri tPLHPropagation Delay TimeC0 to 1724ns Low to High Level OutputC4 tPHLPropagation Delay TimeC0 to 1725ns High to Low Level OutputC4 tPLHPropagation Delay TimeAi Bi 1724ns Low to High Level Outputto C4 tPHLPropagation Delay TimeAi Bi 1726ns High to Low Level Outputto C4 Truth Table TL F 6378 3 HeHigh Level LeLow Level Note Input conditions at A1 B1 A2 B2 and C0 are used to determine outputs R1 and R2 and the value of the internal carry C2 The values at C2 A3 B3 A4 and B4 are then used to determine outputs R3 R4 and C4 3 Logic Diagram TL F 6378 2 4 5 Physical Dimensionsinches millimeters 16 Lead Ceramic Dual In Line Package J Order Number 54LS83ADMQB or DM54LS83AJ NS Package Number J16A 6 Physical Dimensionsinches millimeters Continued 16 Lead Wide Small Outline Molded Package M Order Number DM74LS83AWM NS Package Number M16B 16 Lead Molded Dual In Line Package N Order Number DM74LS83AN NS Package Number N16E 7 54LS83A DM54LS83A DM74LS83A 4 Bit Binary Adders with Fast Carry Physical Dimensionsinches millimeters Continued 16 Lead Ceramic Flat Package W Order Number 54LS83AFMQB or DM54LS83AW NS Package Number W16A 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 Lifesupportdevicesorsystemsaredevicesor2 A critical component is any component of a life systems which a are intended for surgical implantsupport device or system whose failure to perform can into the body or b support or sustain life and whosebe reasonably expected to cause the failure of the life failure to perform when properly used in accordancesupport device or system or to affect its safety or with instructions for use provided in the labeling caneffectiveness be reasonably expected to result in a significant injury to the user National SemiconductorNational SemiconductorNational Semicond