Propz Me Science 74151 IC PDF

74151 IC PDF

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 multiplexer with 2 N input lines requires N select lines.

Note that the implementation below is an active-low. Multiplexer Typical Symbol 2: Various multiplexers are available in discrete chips as well for both series and series.

An enable input makes the multiplexer operate. The enable is 74115 pin 7. Multiplexers are useful in any application in which data must be chosen from multiple sources to a single destination. This page was last modified on 18 Novemberat It does mean that for multiplexers with odd number of inputs, some ci line combinations are not allowed e.

Consider a register file with 32 registers where we only want to select a single register at any given time. A common multiplexer is the 8: Additionally multiplexers have also found their way to various other circuits such as adders. From there the sum of minterms and the logic function for a 2: Large multiplexers can always be built from a collection of smaller ones. One can use a multiplexer to select which of those lines should be going to the shared data bus. Privacy policy About WikiChip Disclaimers.


For a multiplexer with Uc upper N inputs, you also need Equation left ceiling log Subscript 2 Baseline left-parenthesis upper N right-parenthesis right ceiling selection lines.

Retrieved from ” https: 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. The simplest multiplexer is the 2: Complementary outputs, High-Z Enable. 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. Pins 5 and 6 are the outputs, the output on pin 6 is the inverted version of the output on pin 5.

MUX with an SR latch.


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.

Where Equation m Subscript k is the kth minterm of the variable. A set of select lines are then used to choose which of those inputs gets produced as output. Many different uc of multiplexers exist.

Multiplexer | Electronics Tutorial

A multiplxer is a device that receives multiple inputs 71451 usually different sources. It’s often desirable to add an enable or strobe input EN to a multiplexer. Even in ASIC design, arbitrary sized 741151 are not always offered. Output same as input, High-Z Enable. Typically larger multiplxers over 8 or 16 inputs are built using smaller multiplxers using a multiplexer tree.


MUXes are core components in most digital systems as they can be used to pass the correct signal based on some conditional logic.

While smaller overall, this multiplexer is also nonrestoring. There are many way to construct a 4: A truth table is provided on the right.

A single inverter is used to invert the selection line value to one of the gates so that only one of them e. 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.


This section is empty; you can help add the missing info by editing this page. For example, consider a data bus that is connected to multiple memory storage units. This section requires expansion; you can help adding the missing info.

A multiplexer mux or a data selector or input selector is a combinational ix device that selects one of N inputs and provides it on its output.