2-Input 4-Bit Multiplexer Quiz
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Questions and Answers

Match the input combination with its corresponding output in the 3-variable function table:

(0, 1, 1) = 0 (0, 0, 0) = 1 (1, 1, 0) = 0 (1, 0, 1) = 1

Match the manufacturing step in the paint process with its corresponding explanation:

Step 1 = Initial mixing of components Step 2 = Color formulation Step 3 = Quality assessment Step 4 = Packaging of finished paint

Match the output of the Decoder with the corresponding status of the 2-bit counter:

Y0 = 00 Y1 = 01 Y2 = 10 Y3 = 11

Match each signal action with its corresponding step in the manufacturing process:

<p>Completion signal = Triggers the next step Reset signal = Starts the manufacturing sequence Activation signal = Indicates step initiation Interrupt signal = Pauses the process</p> Signup and view all the answers

Match the operation of the Multiplexer with its function in the manufacturing process:

<p>Selecting inputs = Determines which step to initiate Driving outputs = Activates the corresponding Decoder output Counting operations = Tracks the current manufacturing step Resetting system = Prepares for the next cycle</p> Signup and view all the answers

Match the combination of inputs in the 3-variable function table to their function description:

<p>(0, 1, 0) = Enables output 1 (1, 0, 1) = Enables output 0 (0, 0, 1) = Enables output 1 (1, 1, 1) = Enables output 1</p> Signup and view all the answers

Match the function of the Decoder in the manufacturing process to its usage:

<p>Output Y0 = Initiates Step 1 Output Y1 = Initiates Step 2 Output Y2 = Initiates Step 3 Output Y3 = Initiates Step 4</p> Signup and view all the answers

Match the type of logic discussed to its corresponding application scenario:

<p>3-variable function = Used for decision making Multiplexer = Handles multiple inputs Decoder = Enables single output activation Counter = Tracks steps in a process</p> Signup and view all the answers

Match the following data representation terms with their definitions:

<p>Parallel Data = A set of multiple bits transmitted simultaneously Serial Data = Data transmitted one bit at a time Nibble = A parallel set of 4 bits Byte = A parallel set of 8 bits</p> Signup and view all the answers

Match the following components with their functions:

<p>Multiplexer = Selects between multiple input signals NOT Gate = Inverts the input signal 7-Segment Decoder = Converts BCD input to display output Common Cathode = Used in connecting the ground for displays</p> Signup and view all the answers

Match the following types of 7-Segment Displays with their descriptions:

<p>Common Anode = Has positive ends of segments connected together Common Cathode = Has negative ends of segments connected together 7-Segment Display = Consists of 7 LEDs connected in a form of number 8 Multiplexer = Selects between multiple input signals to output</p> Signup and view all the answers

Match the following signals with their meanings in the described circuit:

<p>MSD/LSD Input = 0 = Selects the MSD to display MSD/LSD Input = 1 = Selects the LSD to display Rapid Switching = Allows both digits to be displayed Input A = Connected to the MSD value</p> Signup and view all the answers

Match the following types of data connections with their requirements:

<p>Parallel Transmission = Requires multiple wires for multiple bits Serial Transmission = Requires a single wire for data transfer Multiplexer Usage = Converts parallel data to serial form Remote Locations = Typically use serial communication systems</p> Signup and view all the answers

Match the following BCD inputs with their corresponding displayed numbers:

<p>0010 = 2 1001 = 9 0000 = 0 0101 = 5</p> Signup and view all the answers

Match the following components of a 2-digit display circuit with their roles:

<p>BCDs to 7-Segment Decoder = Decodes BCD inputs to 7-Segment outputs 7-Segment Display = Displays the output representation of digits LEDs = Light sources used in displays Ground = Connected to the negative ends in Common Anode configuration</p> Signup and view all the answers

Match the following components of an 8-to-1 multiplexer with their characteristics:

<p>Inputs I0-I7 = Can take 8 different data bits Single Output = Transmits the selected input serially 74X151 = An example of an 8-to-1 multiplexer Select Lines = Determine which input is routed to the output</p> Signup and view all the answers

Match the following display types with their respective inputs:

<p>MSD = Input A of the multiplexer LSD = Input B of the multiplexer BCD = Binary Coded Decimal used for display 7-Segment Displays = Final output for visual representation</p> Signup and view all the answers

Match the following descriptions of display types with their characteristics:

<p>Common Anode Display = Connected to +5 volts for segment activation Common Cathode Display = Connected to 0 volts for segment activation 7-Segment Output = Connected to segments of the Common Cathode Displays BCD to 7-Segment Decoder Circuit = Translates BCD numbers to visual digits</p> Signup and view all the answers

Match the following functions with their relevant components in a display circuit:

<p>Anode = Positive connection for segment control Cathode = Negative connection for segment control Display Circuit = Shows the visual representation of numbers Input A and B = Received BCD numbers in the alternate circuit</p> Signup and view all the answers

Match the following multiplexer inputs with their effects on displays:

<p>Setting MSD/LSD to 0 = Displays the MSD value Setting MSD/LSD to 1 = Displays the LSD value Switching at high speed = Enables viewing of both digits Input Control = Decides which data to display</p> Signup and view all the answers

Match the following digital design concepts with their explanations:

<p>Parallel Adder = Works with multiple bits simultaneously Transmission Cost = Higher for parallel data systems Data Conversion = Necessary for efficient remote communication System Expansion = Can incorporate more digit displays</p> Signup and view all the answers

Match the following segments of the number '8' with their LED representations:

<p>Top Segment = Segment A Bottom Segment = Segment G Upper Left Segment = Segment B Lower Right Segment = Segment E</p> Signup and view all the answers

Match the following circuits with their application in 7-Segment Displays:

<p>BCD to 7-Segment Display Circuit = Used for direct display of BCD values Multiplexer Circuit = Selects BCD values between two digits Display Output = The visual output from 7-Segment Displays Control Signals = Operates the Multiplexer to switch inputs</p> Signup and view all the answers

Match the following elements of a digital display with their functions:

<p>Display Segments = Light up to form numbers LEDs = Basic building blocks of the display BCD Inputs = Binary numbers displayed on the segments Ground Connection = Defines the low level for the Common Cathode Display</p> Signup and view all the answers

Match the following components of the 2-Input 4-Bit Multiplexer with their descriptions:

<p>G = Active-low pin that enables or disables the multiplexer S = Select input line that connects either set A or B to the output 1Y = Output corresponding to set A 2Y = Output corresponding to set B</p> Signup and view all the answers

Match the following inputs of the 2-Input 4-Bit Multiplexer with their types:

<p>1A = Active-high input from source A 1B = Active-high input from source B 2A = Active-high input from source A 2B = Active-high input from source B</p> Signup and view all the answers

Match the configuration of the 8-Input Multiplexer with its function:

<p>74X153 = Dual 4-input multiplexer used to create 8-input multiplexer NOT gate = Used to connect the two enable inputs of the multiplexers C input = Determines which multiplexer to select based on its state OR gate = Combines the outputs of the two multiplexers</p> Signup and view all the answers

Match the following outputs of the 2-Input 4-Bit Multiplexer with their corresponding inputs:

<p>1Y = Connected to input 1A when G=0 and S=0 2Y = Connected to input 2A when G=0 and S=0 3Y = Connected to input 3B when G=0 and S=1 4Y = Connected to input 4B when G=0 and S=1</p> Signup and view all the answers

Match the following terms related to multiplexers with their correct definitions:

<p>Multiplexer = Device that selects one of many inputs and forwards it to a single output Enable pin = Pin that activates or deactivates the multiplexer Select line = Control line that determines which input is chosen Expanded multiplexer = Formed by connecting multiple smaller multiplexers together</p> Signup and view all the answers

Match the following select input configurations of the 8-Input Multiplexer with their corresponding operations:

<p>C=0 = Selects inputs from the first multiplexer (1C0, 1C1, 1C2, 1C3) C=1 = Selects inputs from the second multiplexer A and B = Determines specific input selected from chosen multiplexer Outputs = Connected together through an OR gate to provide final output</p> Signup and view all the answers

Match the following descriptions of the function table with the correct output behavior of the 2-Input 4-Bit Multiplexer:

<p>G=1 = All outputs are low (0) G=0 and S=0 = Outputs correspond to inputs from set A G=0 and S=1 = Outputs correspond to inputs from set B With G=0 = Function of the multiplexer is active and selecting inputs</p> Signup and view all the answers

Match the following components involved in multiplexers with their purposes:

<p>Input = Source of data fed into the multiplexer Output = Destination where selected data from inputs is sent Select line = Input line used to determine which input to select Enable pin = Pin that controls the operational state of the multiplexer</p> Signup and view all the answers

Match the following multiplexer types with their specifications:

<p>8-to-1 Multiplexer = Uses two 4-to-1 multiplexers 16-Input Multiplexer = Uses two 4-input, dual multiplexers 2-Input, 8-Bit Multiplexer = Uses two 2-input, 4-bit multiplexers 4-to-1 Multiplexer = Selects one out of four inputs</p> Signup and view all the answers

Match the following components with their roles in a multiplexer circuit:

<p>Select Inputs = Determine which data input is passed to the output Enable Inputs = Activate the selection of a specific multiplexer Decoder = Enables one out of multiple multiplexers based on binary inputs OR Gate = Combines outputs from multiple multiplexers</p> Signup and view all the answers

Match the following input combinations with their corresponding outputs for an 8-to-1 multiplexer:

<p>0, 0, 0 = 1C0 1, 0, 1 = 2C1 0, 1, 1 = 1C3 1, 1, 0 = 2C2</p> Signup and view all the answers

Match the following inputs to their descriptions in a 16-input multiplexer:

<p>Inputs C and D = Enable the selection of the multiplexers Ground State = Deactivates the active-low multiplexer enable inputs Active-low Outputs = Used to select multiplexers in the 16-input multiplexer 4-bit inputs = Represent data being passed through multiplexers</p> Signup and view all the answers

Match the following binary input combinations to their outputs in a 2-input, 8-bit multiplexer:

<p>Logic low S = Selects 4-bit inputs A Logic high S = Selects 4-bit inputs B Two 2-input, 4-bit multiplexers = Forms a 2-input, 8-bit multiplexer Simultaneous selection = Occurs when S is set to low for both multiplexers</p> Signup and view all the answers

Match the following multiplexing terms with their definitions:

<p>Multiplexer = A device that selects one of many inputs and forwards the selected input to a single output Active-low = Requires a low level to activate a function Function table = Describes the relationship between inputs and outputs for a multiplexer Disable = Prevents the operation of multiplexers when certain conditions are met</p> Signup and view all the answers

Match the following outputs to their corresponding selectors in an 8-to-1 multiplexer:

<p>1C0 = 0, 0, 0 1C1 = 0, 0, 1 2C0 = 1, 0, 0 2C3 = 1, 1, 1</p> Signup and view all the answers

Match the following multiplexer configurations to their advantages:

<p>8-to-1 Multiplexer = Reduces the number of selectors needed 16-Input Multiplexer = Expands the number of selectable inputs without increasing complexity 2-Input, 8-bit Multiplexer = Allows simultaneous data selection for efficiency 4-to-1 Multiplexer = Simple design ideal for basic applications</p> Signup and view all the answers

Match the multiplexer inputs with their corresponding output states based on the function table:

<p>G=1, D=0, C=0, B=0, A=0 = Output 0 G=0, D=0, C=0, B=0, A=0 = Output 1C0 (M1) G=0, D=0, C=0, B=0, A=1 = Output 1C1 (M1) G=0, D=0, C=1, B=1, A=1 = Output 2C3 (M2)</p> Signup and view all the answers

Match the applications of multiplexers with their descriptions:

<p>Data router = Routes data from multiple sources to one destination Parallel to serial converter = Converts parallel data into serial form Logic function generator = Generates logic functions based on inputs Operation sequencing = Manages the order of operations in digital circuits</p> Signup and view all the answers

Match the enable input G value with the corresponding multiplexer state:

<p>G=0 = Multiplexer enabled G=1 = Multiplexer disabled G=0 with 1 as input = Routes data based on input conditions G=1 with any input = Outputs a fixed state</p> Signup and view all the answers

Match the multiplexer output designations with their binary input combinations:

<p>1C0 (M1) = D=0, C=0, B=0, A=0 2C2 (M2) = D=1, C=1, B=1, A=0 1C1 (M1) = D=0, C=0, B=0, A=1 2C0 (M2) = D=1, C=0, B=0, A=0</p> Signup and view all the answers

Match the input combinations to their respective outputs in the context of M1 multiplexing:

<p>D=0, C=0, B=0, A=0 = 1C0 D=0, C=0, B=1, A=0 = 2C0 D=0, C=1, B=1, A=1 = 2C2 D=1, C=0, B=0, A=1 = 1C1</p> Signup and view all the answers

Match the multiplexer states to their outputs according to the given table:

<p>G=0, D=1, C=1, B=0, A=0 = 2C0 (M2) G=0, D=0, C=1, B=0, A=1 = 1C2 (M1) G=0, D=0, C=1, B=1, A=1 = 2C3 (M1) G=0, D=0, C=0, B=1, A=1 = 1C3 (M2)</p> Signup and view all the answers

Match the given outputs with their respective multiplexer components:

<p>1C2 (M1) = D=0, C=0, B=1, A=0 2C1 (M2) = D=1, C=1, B=0, A=1 1C3 (M2) = D=1, C=0, B=1, A=1 2C3 (M1) = D=0, C=1, B=1, A=1</p> Signup and view all the answers

Study Notes

2-Input 4-Bit Multiplexer

  • The MSI 74X157 is a 2-input, 4-bit multiplexer
  • It has two sets of 4-bit inputs
  • It has 4-bit outputs
  • A single select input line connects either the first or second set of 4-bit inputs to the output
  • Four bits of data from two sources are routed to the output

Function Table

  • Table 18.1 shows the function table of a 2-input 4-bit multiplexer
  • The multiplexer has two sets of 4-bit active-high inputs (1A, 2A, 3A, 4A and 1B, 2B, 3B, 4B)
  • The multiplexer has 4-bit active-high outputs (1Y, 2Y, 3Y, 4Y)
  • The single select input allows either the 4-bit input A or the 4-bit input B to be connected to the 4-bit output Y.
  • The G (active-low) pin enables or disables the multiplexer.

8-Input Multiplexer

  • A single dual 4-input multiplexer (74X153) can be connected to create an 8-input multiplexer
  • The circuit and function table are shown in Figure 18.2 and Table 18.2
  • The two active-low enable inputs of the multiplexers are connected together with a NOT gate
  • When C is 0, the first multiplexer is selected
  • When C is 1, the second multiplexer is selected
  • The outputs from the two multiplexers are connected through an OR gate

16-Input Multiplexer

  • Two 74XX153 dual, 4-input multiplexers can create a 16-input multiplexer
  • The circuit and function table are shown in Figure 18.3 and Table 18.3
  • The select inputs A and B of the two multiplexers are connected together
  • Four active-low multiplexer enable inputs select one of the four multiplexers
  • These enable inputs are connected to the outputs of a 2-to-4 decoder
  • The outputs are connected via an OR gate

2-Input, 8-bit Multiplexer

  • Two 2-input, 4-bit multiplexers (74X157) can be used to create a 2-input, 8-bit multiplexer.
  • The circuit diagram is in Figure 18.4
  • The S inputs of the multiplexers are connected together
  • The A inputs are selected when S is low
  • The B inputs are selected when S is high
  • The enable inputs are also connected together

Applications

  • Multiplexers route data from multiple sources to a single destination
  • They are used as data routers, parallel-to-serial converters, logic function generators, and for sequencing operations

Data Routing for 7-Segment Display

  • Two-digit 7-segment displays use two BCD-to-7-segment display circuits
  • BCD input (0010 to represent 2 and 1001 to represent 9) is applied to the MSD and LSD display circuits
  • BCD-to-7-segment decoding circuits create the 7-segment display outputs
  • The display circuit can be implemented using a single BCD-to-7-segment IC and a multiplexer

Common Anode/Cathode 7-Segment Displays

  • Common anode and common cathode are two types of 7-segment displays
  • Common anode: Positive end of each segment is connected
  • Common cathode: Negative end of each segment is connected

Parallel to Serial Conversion

  • Parallel data (multiple bits) must be converted to serial data (single bits) for transmission over a single wire
  • An 8-bit parallel data can be made serial using an 8-to-1 multiplexer
  • A counter connected to the multiplexers' selection inputs routes each bit serially

Logic Function Generator

  • Multiplexers can implement logic functions directly from a function table—no simplification needed
  • Function variables become select inputs
  • Input values become connected to logic 1 or 0 to represent terms

Operation Sequencing

  • Many manufacturing processes run in a sequence (paint manufacturing as an example)
  • A counter and multiplexer sequence steps of a process
  • Signals indicate the completion of a step, initiating the next process

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Test your understanding of the 2-input 4-bit multiplexer, particularly the MSI 74X157 model. This quiz covers the function table, input/output configurations, and the enable mechanism of the multiplexer. Prepare to answer questions about routing data between inputs and the output!

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