Programming instructions

74xx
 National Instruments Corporation 6-51 Multisim Component Reference Guide
6.4.87 74xx259 (8-bit Latch)
This 8-bit addressable latch is a 1-of-8 decoder or demultiplexer with active high outputs. It
stores single-line data in eight addressable latches.
8-bit addressable latch truth table:
6.4.88 74xx26 (Quad 2-In NAND (OC))
This device contains four independent 2-input NAND gates.
Logic function:
NAND gate truth table:
6.4.89 74xx266 (Quad 2-In XNOR (OC))
This device contains four independent 2-input EXCLUSIVE-NOR gates.
Logic function:
INPUTS OUTPUT OF
ADDRESSED
LATCH
EACH
OTHER
OUTPUT
FUNCTION
CLEAR G
10D Q
i0
Addressable latch
11Q
i0
Q
i0
Memory
0 0 D 0 8-line demultiplexer
0 1 0 0 Clear
Y = AB
ABY
110
0X1
X01
XX1
XX1
Y = A⊕B
ComponentRef.book Page 51 Thursday, December 7, 2006 10:12 AM