4-Line to 1-Line Multiplexers That Can
Select 1-of-16 Data Inputs
Applications:
Boolean Function Generator
Parallel-to-Serial Converter
Data Source Selector
Buffered 3-State Bus Driver Inputs Permit
Multiplexing From n Lines to One Line
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic
(NT) and Ceramic (JT) 300-mil DIPs

description
The ′AS250A devices provide full binary decoding
to select 1-of-16 data inputs or use sources as an
input with an inverting W output. The selected
sources are buffered with symmetrical
propagation delay times. This reduces the
possibility of transients occurring at the output.
A buffered output-enable (OE) input can be used
for n-line to 1-line cascading. Taking OE high
places the output in the high-impedance state. In
the high-impedance state, the output neither loads
nor drives the bus lines significantly.
OE does not affect the internal operations of the
data selector/multiplexer. New data can be set up
while the outputs are disabled.
The SN54AS250A is characterized for operation
over the full military temperature range of −55°C
to 125°C. The SN74AS250A is characterized for
operation from 0°C to 70°C.