Programming instructions

74xx
 National Instruments Corporation 6-13 Multisim Component Reference Guide
NAND gate truth table
6.4.26 74xx134 (12-In NAND w/3-state Out)
12-Input NAND with 3-state outputs:
6.4.27 74xx135 (Quad Ex-OR/NOR Gate)
This device can operate as Exclusive-OR gate (C input low) or as Exclusive-NOR gate (C
input high).
Exclusive-OR/NOR gate truth table:
INPUTS A THRU M Y
All inputs 1 0
One or more inputs 0 1
INPUTS A THRU L OC Y
All inputs 1 0 0
One or more inputs 0 0 1
Don't care 1 Z
Z = high impedance (off)
INPUTS OUTPUT
ABCY
0000
0101
1001
1100
0011
0110
1010
1111
ComponentRef.book Page 13 Thursday, December 7, 2006 10:12 AM