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SN54LS251 Status: ACTIVE

Data Selectors/Multiplexers With 3-State Outputs


      
         
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Datasheet

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 SN54LS251SN74LS251 
Voltage Nodes(V)5  5  
Vcc range(V)4.5 to 5.5  4.75 to 5.25  
Input LevelTTL  TTL  
Output LevelTTL  TTL  
Output Drive(mA) -2.6/8  
Output3S  3S  
From8  8  
To1  1  
Technology FamilyLS  LS  
RatingMilitary  Catalog  
 SamplesSamples
 InventoryInventory

Other qualified versions of SN54LS251

Version Part Number Definition
Catalog SN74LS251 TI's standard catalog product

Customers Who Evaluated This Product Also Evaluated

  • SN54LS399: Quadruple 2-Input Multiplexers With Storage
  • SN54LS257B: Quadruple 2-Line To 1-Line Data Selectors/Multiplexers
  • SN54LS125A: Quadruple Bus Buffer Gates With 3-State Outputs
  • SN54HC14: Hex Schmitt-trigger Inverters
  • SN54LS164: 8-Bit Parallel-Out Serial Shift Registers

Product Information

Features

  • Three-State Versions of '151, 'LS151, 'S151
  • Three State Outputs Interface Directly with System Bus
  • Perform Parallel-to-Serial Conversion
  • Permit Multiplexing from N-Lines to One Line
  • Complementary Outputs Provide True and Inverted Data
  • Fully Compatible with Most TTL Circuits

 

Description

These monolithic data selectors/multiplexers contain full on-chip binary decoding to select one-of-eight data sources and feature a strobe-controlled three-state output. The strobe must be at a low logic level to enable these devices. The three-state outputs permit a number of outputs to be connected to a common bus. When the strobe input is high, both outputs are in a high-impedance state in which both the upper and lower transistors of each totem-pole output are off, and the output neither drives nor loads the bus significantly. When the strobe is low, the outputs are activated and operate as standard TTL totem-pole outputs.

To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output control circuitry is designed so that the average output disable time is shorter than the average output enable time.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)DSCC #Price | QuantityPackage | PinsPackage QTY | Package CarrierFootprintsSamples
7601601EAACTIVE-55 to 125 3.72 | 1kuCDIP (J) | 16 1 | TUBE Download CAD Format for this FootprintPurchase Samples
7601601FAACTIVE-55 to 125 13.69 | 1kuCFP (W) | 16 1 | TUBE Purchase Samples
JM38510/30905B2AACTIVE-55 to 125 10.81 | 1kuLCCC (FK) | 20 1 | TUBE Download CAD Format for this FootprintPurchase Samples
JM38510/30905BEAACTIVE-55 to 125 2.80 | 1kuCDIP (J) | 16 1 | TUBE Download CAD Format for this FootprintPurchase Samples
SN54LS251JACTIVE-55 to 125 3.19 | 1kuCDIP (J) | 16 1 | TUBE Download CAD Format for this FootprintPurchase Samples
SNJ54LS251FKACTIVE-55 to 125 13.86 | 1kuLCCC (FK) | 20 1 | TUBE Download CAD Format for this FootprintPurchase Samples
SNJ54LS251JACTIVE-55 to 1257601601EA3.72 | 1kuCDIP (J) | 16 1 | TUBE Download CAD Format for this FootprintPurchase Samples
SNJ54LS251WACTIVE-55 to 1257601601FA13.69 | 1kuCFP (W) | 16 1 | TUBE Purchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:25 AM GMT, 24 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 6 Weeks7601601EA
None Reported
View Distributors
TI Lead Time*: 6 Weeks7601601FA
AmericasRochester Electronics 4
TI Lead Time*: 6 WeeksJM38510/30905B2A
None Reported
View Distributors
TI Lead Time*: 6 WeeksJM38510/30905BEA
AmericasArrow 93
Avnet 410
TI Lead Time*: 6 WeeksSN54LS251J
AmericasArrow >1k
Avnet 47
Rochester Electronics >1k
EuropeAvnet-SILICA 33
EBV Elektronik 50
TI Lead Time*: 6 WeeksSNJ54LS251FK
AmericasRochester Electronics 107
TI Lead Time*: 6 WeeksSNJ54LS251J
AmericasArrow 276
EuropeArrow Northern Europe 2
TI Lead Time*: 6 WeeksSNJ54LS251W
AmericasRochester Electronics 6
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
7601601EA  TBD A42  N/A for Pkg TypeViewView
7601601FA  TBD A42  N/A for Pkg TypeViewView
JM38510/30905B2A  TBD POST-PLATE N/A for Pkg TypeViewView
JM38510/30905BEA  TBD A42  N/A for Pkg TypeViewView
SN54LS251J  TBD A42  N/A for Pkg TypeViewView
SNJ54LS251FK  TBD POST-PLATE N/A for Pkg TypeViewView
SNJ54LS251J  TBD A42  N/A for Pkg TypeViewView
SNJ54LS251W  TBD A42  N/A for Pkg TypeViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

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Datasheet

Application Notes

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Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
SN54LS399 Quadruple 2-Input Multiplexers With Storage DECODERS/ENCODERS/MULTIPLEXERS-DATA SELECTORS/MULTIPLEXERS TI customers also evaluated this product.
SN54LS257B Quadruple 2-Line To 1-Line Data Selectors/Multiplexers DECODERS/ENCODERS/MULTIPLEXERS-DATA SELECTORS/MULTIPLEXERS TI customers also evaluated this product.
SN54LS125A Quadruple Bus Buffer Gates With 3-State Outputs BUFFERS, DRIVERS AND TRANSCEIVERS-INVERTING BUFFERS AND DRIVERS TI customers also evaluated this product.
SN54HC14 Hex Schmitt-trigger Inverters BUFFERS, DRIVERS AND TRANSCEIVERS-INVERTING BUFFERS AND DRIVERS TI customers also evaluated this product.
SN54LS164 8-Bit Parallel-Out Serial Shift Registers FLIP-FLOPS, LATCHES AND REGISTERS-SHIFT REGISTERS TI customers also evaluated this product.
SN54HC132 Quadruple Positive-NAND Gates With Schmitt-trigger Inputs GATES-NAND GATES TI customers also evaluated this product.
SN54LS393 Dual 4-Bit Binary Counters COUNTERS-BINARY COUNTERS TI customers also evaluated this product.
SN54HC02 Quadruple 2-Input Positive-NOR Gates GATES-NOR GATES TI customers also evaluated this product.
SN54LS283 4-Bit Binary Full Adders With Fast Carry ARITHMETIC AND PARITY FUNCTIONS-ADDERS TI customers also evaluated this product.
SN54HC74 Dual D-type Positive-Edge-Triggered Flip-Flops With Clear And Preset FLIP-FLOPS, LATCHES AND REGISTERS-D-TYPE FLIP-FLOPS TI customers also evaluated this product.
SN54HC32 Quadruple 2-Input Positive-OR Gates GATES-NOR GATES TI customers also evaluated this product.
SN54LS374 Octal D-Type Edge Triggered Flip-Flops with 3-State Outputs FLIP-FLOPS, LATCHES AND REGISTERS-D-TYPE (3-STATE) FLIP-FLOPS TI customers also evaluated this product.

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