Programming instructions

TTL
Multisim Component Reference Guide 6-64 ni.com
6.4.11274xx374 (Octal D-type FF (+edge))
This 8-bit register features three-state bus-driving outputs and transparent D-type flip-flops.
D-latch and flip-flop truth table:
6.4.11374xx375 (4-bit Bistable Latches)
This device features outputs from a 4-bit latch.
Sample bistable latch truth table:
6.4.11474xx377 (Octal D-type FF w/en)
This device contains eight flip-flops with single-rail outputs.
Sample D-type flip-flop truth table:
OUTPUT ENABLE
ENABLE LATCH D OUTPUT
0· 11
0· 00
00XQ0
1XXZ
Z = High impedance (off)
· = Transition from low to high
DCQQ
0101
1110
X 0 Q0 Q0
G CLK DATA QQ
1XX Q0Q0
0· 1 10
0· 0 01
X0X QOQ0
ComponentRef.book Page 64 Thursday, December 7, 2006 10:12 AM