Programming instructions

74xx
 National Instruments Corporation 6-63 Multisim Component Reference Guide
6.4.11074xx37 (Quad 2-In NAND)
This device contains four independent 2-input NAND gates.
Logic function:
NAND gate truth table:
6.4.111 74xx373 (Octal D-type Transparent Latches)
This 8-bit register features three-state bus-driving outputs and transparent D-type latches.
D-latch and flip-flop truth table:
Y = AB
ABY
001
101
011
110
OUTPUT ENABLE
ENABLE LATCH D OUTPUT
01 11
01 00
00 XQ0
1XXZ
Z = High impedance (off)
ComponentRef.book Page 63 Thursday, December 7, 2006 10:12 AM