8-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs

These monolithic data selectors/multiplexers SN74LS251 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. The SN54251 and SN74251 have output clamp Diodes to attenuate reflections on the bus line.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN74LS251W Rochester Electronics LLC Multiplexer
SN74LS251J Rochester Electronics LLC Multiplexer
SN74LS251DR2 Rochester Electronics LLC Multiplexer, LS Series, 1-Func, 8 Line Input, 1 Line Output, Complementary Output, TTL, PDSO16, PLASTIC, SOIC-16
SN74LS251N Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-PDIP 0 to 70
SN74LS251NSR Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SO 0 to 70
SN74LS251D Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SOIC 0 to 70
SN74LS251NSRE4 Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-SO 0 to 70
SN74LS251DRE4 Texas Instruments LS SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16, GREEN, PLASTIC, SOIC-16
SN74LS251DRG4 Texas Instruments LS SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16, GREEN, PLASTIC, SOIC-16
SN74LS251NE4 Texas Instruments 8-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs 16-PDIP 0 to 70
SN74LS251 's PackagesSN74LS251 's pdf datasheet
SN74LS251D SOIC
SN74LS251DE4 SOIC
SN74LS251DG4 SOIC
SN74LS251DR SOIC
SN74LS251DRE4 SOIC
SN74LS251DRG4 SOIC
SN74LS251N PDIP
SN74LS251N3 PDIP
SN74LS251NE4 PDIP
SN74LS251NSR SO
SN74LS251NSRE4 SO
SN74LS251NSRG4 SO




SN74LS251 Pinout, Pinouts
SN74LS251 pinout,Pin out
This is one package pinout of SN74LS251,If you need more pinouts please download SN74LS251's pdf datasheet.

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