Programming instructions

TTL
Multisim Component Reference Guide 6-50 ni.com
Data selector/multiplexer truth table:
6.4.86 74xx258 (Quad 2-to-1 line Data Sel/MUX)
This device is designed to multiplex signals from 4-bit data sources to 4-output data lines in
bus-organized systems. Its 3-state outputs interface directly with the system bus.
Data selector/multiplexer truth table:
OUTPUT
CONTROL
SELECTABY
1 X XXZ
000X0
001X1
01X00
01X11
Z = High impedance (off)
OUTPUT
CONTROL
SELECTABY
1 X XXZ
000X0
001X1
01X00
01X11
Z = High impedance (off)
ComponentRef.book Page 50 Thursday, December 7, 2006 10:12 AM