Bcd To Decimal Decoder 1820-0426; Voltage Comparator/Buffer 1820-0475 - HP 5340A Operating And Service Manual

Figure 4-14. BCD to Decimal Decoder 1820-0426
A 3
-
8 6
-
c 7
Total Power DissiDation = 1 0 5 m W t y p l p k g
Figure 4-15. Voltage Comparator/Buffer 1820-0475
4-37. Binary to Decimal Decoder 1820-0495
4-38. The decoder (Figure 4-16) acceptsfour bikary weighted inputs and provides oneof 16 out-
puts corresponding to the input code. E O and E l are low AND enable inputs. When E O and E l
are both low, the inputs at
goes low. For example, when AO=l, A1=0, A2=0, and A3=1, then the
1 6
15
8 5 2
9
1 3 8 4
1 4 8 5
8 6
1 1
1 0 8 7
8 8
1
2
Note: Pin 4 connected to case.
Model 5340A
Theory of Operation
TRUTH TABLE
INPUT OUTPUT
1 2 3 4
5 6 7 8 9
0 0 0 0 0 1 1 1 1 1 1
0 0 1 0 1 1 0 1 1 1 1
0 0 1 1 1 1 1 0 1 1
0 1 0 0 1 1 1 1 0 1
0 1 0 1 1 1 1 1 1 0 1
0 1 1 0 1 1 1 1 1 1 0
0 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1
1 0 0 0 1
1 0 0 1 1 1 1 1 1 1 1
output goes low.
9
1 1 1
1 1 1
1 1 1
1
1 1
0 1 1
1 0 1
1 1 0
4-1 1