ON SN74LS251N

多路复用器1 x 8：14.75V ~ 5.25V

Overview

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. The SN54251 and SN74251 have output clamp diodes to attenuate reflections on the bus line.

Features

74LS Series
Supplied in the 16-DIP (0.300, 7.62mm) package
Adopting a supply type of Single
Power supplies of 5V
Operating with the supply voltage of 5V

Through Hole Mounting Type

Applications

There are a lot of Texas Instruments
SN74LS251N Signal Switches / Multiplexers / Decoders applications.

• Time division multiplexing system
• Frequency multiplexing system
• A/D converters
• D/A converters
• Implementing boolean functions with multiple variables
• Data collection system
• Audio transmission
• Video transmission
• Image transmission
• Recording transmission