How many 2-to-1 Multiplexers are required to construct a 16-to-1 Multiplexer?
Number of 2:1 MUXes needed to construct an N:1 MUX is N - 1 = 16 - 1 = 15.
How many 4-to-1 multiplexers are needed to construct a 64-to-1 multiplexer?
Use a 4-ary tree: 16 MUXes at level 1, 4 at level 2, and 1 at level 3, totaling 21.
A 3-to-8 Decoder with active-LOW outputs has select inputs A, B, C ($A = MSB$). If input ABC = 101_2 and Enable $E = 1 (active HIGH enable)$, which output line is LOW?
Input 101_2 = decimal 5. For active-LOW output decoder, output line Y5 goes LOW (0), while all other output lines remain HIGH (1).
To build a 5-to-32 decoder using only 3-to-8 decoders for the final output stage, how many 3-to-8 decoders are required?
Four 3-to-8 decoders provide 32 final outputs; additional enable-selection logic uses the upper address bits.
Which type of PLD (Programmable Logic Device) has a PROGRAMMABLE AND array and a FIXED OR array?
PROM: Fixed AND, Programmable OR. PAL: Programmable AND, Fixed OR. PLA: Programmable AND, Programmable OR.