221. Use the weighting factors to convert the following BCD numbers to binary. 01010011001001101000
(a) 01010011 001001101000
(b) 11010100 100001100000
(c) 110101 100001100
(d) 101011 001100001
222. From the following list of input conditions, determine the state of the five output leads on a 74148 octal-to-binary encoder. I0 = 1 I3 = 1 I6 = 1 I1 = 1 I4 = 0 I7 = 1 I2 = 1 I5 = 1 EI = 0
(a) GS = L, A0 = L, A1 = L, A2 = H, EO = H
(b) GS = L, A0 = H, A1 = L, A2 = L, EO = H
(c) GS = L, A0 = L, A1 = H, A2 = L, EO = H
(d) GS = L, A0 = H, A1 = H, A2 = L, EO = H
223. How many outputs are on a BCD decoder?
(a) 4
(b) 16
(c) 8
(d) 10
224. A principle regarding most IC decoders is that when the correct input is present, the related output will switch:
(a) active-HIGH
(b) to a high impedance
(c) to an open
(d) active-LOW
225. How many inputs are required for a 1-of-10 BCD decoder?
(a) 4
(b) 8
(c) 10
(d) 1
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