[ /Title
(CD74H
C157,
CD74H
CT157,
CD74H
C158,
CD74H
CT158)
/Subject
(High
Speed The CD54HC158 and
CD74HC158 are obsolete and
no longer are supplied. CD54/74HC157, CD54/74HCT157,
CD54/74HC158, CD54/74HCT158 Data sheet acquired from Harris Semiconductor
SCHS153C High-Speed CMOS Logic
Quad 2-Input Multiplexers September 1997 -Revised October 2003 Features Description Common Select Inputs The ’HC157, ’HCT157, ’HC158, and ’HCT158 are quad 2input multiplexers which select four bits of data from two
sources under the control of a common Select input (S). The
Enable input (E) is active Low. When (E) is High, all of the
outputs in the 158, the inverting type, (1Y-4Y) are forced
High and in the 157, the non-inverting type, all of the outputs
(1Y-4Y) are forced Low, regardless of all other input
conditions. Separate Enable Inputs Buffered inputs and Outputs Fanout (Over Temperature Range) …
