Virtual Labs

a: The number of inputs and outputs are equal. b: The number of outputs is greater than the number of inputs. c: The number of inputs is greater than the number of outputs. d: There is no input required.

The BCD to decimal decoder shown in figure given below is examined with a logic analyzer and the results are shown in the waveforms in figure. What if anything is wrong with the circuit?

a: The “2” output is shorted to Vcc b: The A₁ input node is internally stuck at LOW. c: The A₁ input is internally open. d: Nothing is wrong with the circuit

Operating free air temperature range of this IC 7442 is

a: 70°C - 80°C b: 0°C - 70°C c: 80°C - 100°C d: −70°C - 70°C

Gate that can be used as basic decoding element is

a: NAND gate b: NOT gate c: AND gate d: OR gate

Typical propagation delay for this Decoder IC is

a: 7 ns b: 14 ns c: 17 ns d: 23 ns

The highest decimal digit that can be coded to BCD is

a: 7 b: 8 c: 9 d: 10

The number of inverters present in 7442 IC is

a: 6 b: 7 c: 8 d: 9

How many four input NAND gates are present in IC 7442?

a: 10 b: 12 c: 4 d: 5

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