IC Figure below shows the 8-to-1 multiplexer Integrated circuit of TTL family This Integrated circuit has active LOW ENABLE input and gives. Texas Instruments [ KB ]; Data Sheet (current) [88 KB ]; Fairchild Semiconductors [58 KB ]; Data Sheet (current) [ KB ] 8-Input Multiplexer IC. I3, 1 •, 16, Vcc. I2, 2, 15, I4. I1, 3, 14, I5. I0, 4, 13, I6. Y, 5, 12, I7. Y, 6, 11, S0. E, 7, 10, S1. GND, 8, 9, S2. Pin, Symbol, Description. 1, I3, multiplexer input.
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A truth table is provided on the right. For a multiplexer with Equation upper N inputs, you also need Equation left ceiling log Subscript 2 Baseline left-parenthesis upper N right-parenthesis right ceiling selection lines. Output same as input, High-Z Enable.
A set of select lines are then used to choose which of those inputs gets produced as output.
Multiplexer (MUX) – WikiChip
This section is empty; you can help add the missing info by editing this page. Consider a register file with 32 registers where we only want to select a single register at any given time. The K-Map for that truth table is provided on the left. Retrieved from ” https: For example, consider a data bus that is connected to multiple memory storage units.
Signals to the select lines usually come from a control unit that determines which, if any, of the signals should be routed to some destination. Multiplexers generally only come in a few common sizes. MUXes are core components in most digital systems as they can be used to pass the correct signal based on some conditional logic.
Multiplexer Typical Symbol 2: A multiplxer is a device that receives multiple inputs from usually different sources.
Various multiplexers are available in discrete chips as well for both series and series. Its selection lines is therefore made of a single bit. A set of inputs called select lines determine which input should be passed to the output.
Where Equation m Subscript k is the kth minterm of the variable. A single inverter is used to invert the selection line value to one of the gates so that only one of them e. This page was last modified on 18 Novemberat Large multiplexers can always be built from a collection of smaller ones. While smaller overall, this multiplexer is also nonrestoring.
An enable input makes the multiplexer operate.
It’s often desirable to add an enable or strobe input EN to a multiplexer. There are many way to construct a 4: The simplest multiplexer is the 2: Complementary outputs, High-Z Enable. Many different variations of multiplexers exist. Pins 5 and 6 are the outputs, the output on pin 6 is the inverted version of the output on pin 5.
A multiplexer with 2 N input lines requires N select lines. The enable is on pin 7. Note that the implementation below is an active-low. One 71451 use a multiplexer to select which of those lines should be going to the shared data bus.
This section requires expansion; you can help adding the missing info.
A multiplexer mux or a data selector or input selector is a combinational circuit device that selects one of N inputs and provides it on its output. It does mean that for multiplexers with odd number of inputs, some selection line 744151 are not allowed e.
Typically larger multiplxers over 8 or 16 inputs are built using smaller multiplxers using a multiplexer tree.
The top transmission gate controls if the input from A should pass to the output while the bottom transmission gate does the same for the B input. Vcc is on pin 16 and GND is on pin 8. Those types of multiplexers can be hooked up directly to a shared bus ensuring that only one signal is being generated on the bus at any given time.
From there the sum of minterms and the logic function for a 2: