Programming instructions

74xx
 National Instruments Corporation 6-43 Multisim Component Reference Guide
Octal BUFFER gate truth table:
6.4.78 74xx246 (BCD-to-seven segment dec)
The BCD-to-seven-segment decoder/driver features active-low outputs designed for driving
indicators directly. It has full ripple-blanking input/output controls and a lamp test input.
BCD-to-seven-segment decoder/driver truth table:
INPUTS OUTPUTS
G
A1 A2 A3 A4 Y1 Y2 Y3 Y4
1XXXXZZZZ
0XXXXA1A2A3A4
Z = High impedance (off)
A1, A2... = The level of the respective input
ComponentRef.book Page 43 Thursday, December 7, 2006 10:12 AM