Programming instructions

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Multisim Component Reference Guide 6-14 ni.com
6.4.28 74xx136 (Quad 2-in Exc-OR gate)
This device is a quadruple 2-input exclusive-OR gate with open-collector outputs.
Exclusive-OR gate truth table:
6.4.29 74xx138 (3-to-8 Dec)
This device decodes one of eight lines dependent on the conditions at the three binary select
inputs and the three enable inputs.
3-to-8 decoder/demultiplexer truth table:
INPUTS OUTPUT
ABY
000
011
101
110
SELECT
GL
G1 G2 CBAY0Y1Y2Y3Y4Y5Y6Y7
XX1XXX11111111
X0XXXX11111111
01000001111111
01000110111111
01001011011111
01001111101111
01010011110111
01010111111011
01011011111101
01011111111110
110XXXOutput corresponding to stored address 0; all
others 1
ComponentRef.book Page 14 Thursday, December 7, 2006 10:12 AM