Texas Instruments SN74LS251N Data Selector / Multiplexer 3-State Outputs LS Family 1 Channels 8:1 4.75 V to 5.25 DIP-16

The SN74LS251N is a 8-to-1 Data Selector/Multiplexer with 3-state outputs. It contains 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 OD time is shorter than the average output enable time.

• 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

Applications

Industrial, Communications & Networking

Other details

Brand	TEXAS INSTRUMENTS
Part Number	SN74LS251N
Quantity	Each

All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.

All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.