Programming instructions

TTL
Multisim Component Reference Guide 6-16 ni.com
BCD to decimal decoder/driver truth table:
6.4.33 74xx147 (10-to-4 Priority Enc)
This TTL encoder features priority decoding of the inputs to ensure that only the highest-
order data line is encoded. It encodes nine data lines to four-line (8-4-2-1) BCD.
10l-line to 4-line priority encoder truth table:
INPUTS OUTPUTS
No.DCBA0123456789
000000111111111
100011011111111
200101101111111
300111110111111
401001111011111
501011111101111
601101111110111
701111111111011
810001111111101
910011111111110
INVALID
10101111111111
10111111111111
11001111111111
11011111111111
11101111111111
11111111111111
INPUTS OUTPUTS
123456789DCBA
1111111111111
XXXXXXXX00110
XXXXXXX010111
XXXXXX0111000
XXXXX01111001
XXXX011111010
XXX0111111011
XX01111111100
X011111111101
0111111111110
ComponentRef.book Page 16 Thursday, December 7, 2006 10:12 AM