Programming instructions

74xx
 National Instruments Corporation 6-29 Multisim Component Reference Guide
6.4.55 74xx17 (Hex BUFFER (OC))
This device contains six independent BUFFER/Drivers. For correct performance, the open
collector outputs require pull-up resistors.
BUFFER gate truth table:
6.4.56 74xx173 (4-bit D-type Reg w/3-state Out)
D-type register truth table:
A Y
0
0
1
1
DATA
ENABLE
DATA OUTPUT
CLEAR CLK G
1G2D Q
1 XXXX 0
0 0 XXX Q0
0·1XXQ0
0·X1XQ0
0 · 000 0
0 · 001 1
ComponentRef.book Page 29 Thursday, December 7, 2006 10:12 AM