DM74LS251 3-STATE 1-of-8 Line Data Selector/Multiplexer
August 1986 Revised March 2000
DM74LS251 3-STATE 1-of-8 Line Data Selector/Multiplexer
General Description
These data selectors/multiplexers contain full on-chip binary decoding to select one-of-eight data sources, and feature a strobe-controlled 3-STATE output.
The strobe must be at a low logic level to enable these devices.
The 3STATE outputs permit direct connection to a common bus.
When the strobe input is HIGH, both outputs are in a highimpedance 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 ...