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Questions and Answers
Match the input combination with its corresponding output in the 3-variable function table:
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:
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:
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:
Match each signal action with its corresponding step in the manufacturing process:
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Match the operation of the Multiplexer with its function in the manufacturing process:
Match the operation of the Multiplexer with its function in the manufacturing process:
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Match the combination of inputs in the 3-variable function table to their function description:
Match the combination of inputs in the 3-variable function table to their function description:
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Match the function of the Decoder in the manufacturing process to its usage:
Match the function of the Decoder in the manufacturing process to its usage:
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Match the type of logic discussed to its corresponding application scenario:
Match the type of logic discussed to its corresponding application scenario:
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Match the following data representation terms with their definitions:
Match the following data representation terms with their definitions:
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Match the following components with their functions:
Match the following components with their functions:
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Match the following types of 7-Segment Displays with their descriptions:
Match the following types of 7-Segment Displays with their descriptions:
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Match the following signals with their meanings in the described circuit:
Match the following signals with their meanings in the described circuit:
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Match the following types of data connections with their requirements:
Match the following types of data connections with their requirements:
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Match the following BCD inputs with their corresponding displayed numbers:
Match the following BCD inputs with their corresponding displayed numbers:
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Match the following components of a 2-digit display circuit with their roles:
Match the following components of a 2-digit display circuit with their roles:
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Match the following components of an 8-to-1 multiplexer with their characteristics:
Match the following components of an 8-to-1 multiplexer with their characteristics:
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Match the following display types with their respective inputs:
Match the following display types with their respective inputs:
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Match the following descriptions of display types with their characteristics:
Match the following descriptions of display types with their characteristics:
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Match the following functions with their relevant components in a display circuit:
Match the following functions with their relevant components in a display circuit:
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Match the following multiplexer inputs with their effects on displays:
Match the following multiplexer inputs with their effects on displays:
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Match the following digital design concepts with their explanations:
Match the following digital design concepts with their explanations:
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Match the following segments of the number '8' with their LED representations:
Match the following segments of the number '8' with their LED representations:
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Match the following circuits with their application in 7-Segment Displays:
Match the following circuits with their application in 7-Segment Displays:
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Match the following elements of a digital display with their functions:
Match the following elements of a digital display with their functions:
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Match the following components of the 2-Input 4-Bit Multiplexer with their descriptions:
Match the following components of the 2-Input 4-Bit Multiplexer with their descriptions:
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Match the following inputs of the 2-Input 4-Bit Multiplexer with their types:
Match the following inputs of the 2-Input 4-Bit Multiplexer with their types:
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Match the configuration of the 8-Input Multiplexer with its function:
Match the configuration of the 8-Input Multiplexer with its function:
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Match the following outputs of the 2-Input 4-Bit Multiplexer with their corresponding inputs:
Match the following outputs of the 2-Input 4-Bit Multiplexer with their corresponding inputs:
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Match the following terms related to multiplexers with their correct definitions:
Match the following terms related to multiplexers with their correct definitions:
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Match the following select input configurations of the 8-Input Multiplexer with their corresponding operations:
Match the following select input configurations of the 8-Input Multiplexer with their corresponding operations:
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Match the following descriptions of the function table with the correct output behavior of the 2-Input 4-Bit Multiplexer:
Match the following descriptions of the function table with the correct output behavior of the 2-Input 4-Bit Multiplexer:
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Match the following components involved in multiplexers with their purposes:
Match the following components involved in multiplexers with their purposes:
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Match the following multiplexer types with their specifications:
Match the following multiplexer types with their specifications:
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Match the following components with their roles in a multiplexer circuit:
Match the following components with their roles in a multiplexer circuit:
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Match the following input combinations with their corresponding outputs for an 8-to-1 multiplexer:
Match the following input combinations with their corresponding outputs for an 8-to-1 multiplexer:
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Match the following inputs to their descriptions in a 16-input multiplexer:
Match the following inputs to their descriptions in a 16-input multiplexer:
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Match the following binary input combinations to their outputs in a 2-input, 8-bit multiplexer:
Match the following binary input combinations to their outputs in a 2-input, 8-bit multiplexer:
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Match the following multiplexing terms with their definitions:
Match the following multiplexing terms with their definitions:
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Match the following outputs to their corresponding selectors in an 8-to-1 multiplexer:
Match the following outputs to their corresponding selectors in an 8-to-1 multiplexer:
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Match the following multiplexer configurations to their advantages:
Match the following multiplexer configurations to their advantages:
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Match the multiplexer inputs with their corresponding output states based on the function table:
Match the multiplexer inputs with their corresponding output states based on the function table:
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Match the applications of multiplexers with their descriptions:
Match the applications of multiplexers with their descriptions:
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Match the enable input G value with the corresponding multiplexer state:
Match the enable input G value with the corresponding multiplexer state:
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Match the multiplexer output designations with their binary input combinations:
Match the multiplexer output designations with their binary input combinations:
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Match the input combinations to their respective outputs in the context of M1 multiplexing:
Match the input combinations to their respective outputs in the context of M1 multiplexing:
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Match the multiplexer states to their outputs according to the given table:
Match the multiplexer states to their outputs according to the given table:
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Match the given outputs with their respective multiplexer components:
Match the given outputs with their respective multiplexer components:
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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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Description
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!