4-line to line Decoders/demultiplexers. Each or these 4-line-toline decoders utilizes TTL circuitry to decode four binary-coded inputs into one of. MOS technology. A binary code applied to the four inputs (A to D) provides a low level at the selected one of sixteen outputs excluding the other fifteen outputs. SNN .. of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration.

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Y Performs the demultiplexing function by distributing data. Post as a guest Name.

Y Typical propagation delay. Note 2 Not more than one output should be shorted at a time.

4 Line to 16 Line Demultiplexer / Decoder

If you want to know exactly what is going on then draw out the truth table, but it is unlikely their function will make much sense to you. Y Typical power dissipation mW.

According to the internal logic diagram on the datasheet, the Dafasheet inputs are connected to a two-input AND gate with inverting inputs, whose output feeds one input of all the NAND gates that produce the outputs. Since the ouputs are active low, NAND gates do the job. Sign up using Facebook.


74154 Datasheet PDF

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Datassheet Required, but never shown. Low to High Level Output. High to Low Level Output. That is, for an input ofthe 0 output is selected, and it is driven low. The active-low enable inputs allow cascading of demultiplexers over dataaheet bits.

This chip is often used in demultiplexing applications, such as digital clocks, LED matrices, and other graphical outputs. Home Questions Tags Users Unanswered.

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Y Alternate Military Aerospace device is avail. Note 3 I CC is measured with all outputs open and all inputs grounded. WhatRoughBeast 49k 2 28 View PDF for Mobile. My first question is more important Sign up or log in Sign up using Google. I OS Short Circuit. All inputs are buffered and input clamping diodes are provided to minimize transmission-line effects and thereby simplify system design.

Electrical Characteristics over recommended operating free air temperature range unless otherwise noted. These demultiplexers are ideally suited for implementing high-performance memory decoders. By using our site, you acknowledge that you dtasheet read and understand our Cookie Policy dqtasheet, Privacy Policyand our Terms of Service.


When either strobe input is high, all outputs are high. High Level Input Voltage. And why are there 2 of them, you ask?

Datasheet(PDF) – National Semiconductor (TI)

The LED can be chosen at random by the status of the 4 line selector inputs. Low Level Input Current.

The demultiplexing function is performed by using the 4 input lines to address the output line, passing data from one of the strobe inputs with the other strobe input low. High Level Input Current. So is it possible that both enables are hooked to a 2-input OR gate; this is just making use of the extra pins to make 24? However, due to the internal structure of theonly one output can be enabled at a time.

Download the datasheet below for a more comprehensive summary. V CC e Max.