[ /Title
(CD74
HC257
,
CD74
HCT25
7)
/Subject
(High
Speed
CMOS
Logic
Quad
2-Input
Multiplexer CD54HC257, CD74HC257,
CD54HCT257, CD74HCT257
Data sheet acquired from Harris Semiconductor
SCHS171D November 1997 -Revised October 2003 High-Speed CMOS Logic Quad 2-Input
Multiplexer with Three-State Non-Inverting Outputs Features all other input conditions. Buffered Inputs Moving data from two groups of registers to four common
output buses is a common use of the 257. The state of the
Select input determines the particular register from which
the data comes. It can also be used as a function generator. Typical Propagation Delay ( In to Output ) = 12ns at
VCC = 5V, CL = 15pF, TA = 25oC Fanout (Over Temperature Range) Ordering Information -Standard Outputs . 10 LSTTL Loads …
