CD4042 PDF

The CD quad clocked “D” latch is a monolithic complementary MOS (CMOS) integrated circuit constructed with P- and N-channel enhancement mode. Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise . CD Datasheet, CD Quad Clocked D Latch Datasheet, buy CD

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Polarity changes the rising and fall time of the Output for understanding this see the waveform below:. It indeed memorizes the logical state present on the entry D at the moment of the positive transition applied to entry CLOCK.

The rocker D used in practice preceding can function as synchronous latch. Get Our Weekly Newsletter! Dynamic page of welcome.

The truth table of the IC is given below:. Electronic forum and Infos. Forms maths Geometry Physics 1.

The flip flop inside the CD IC works as per the table given below: If the polarity set to high or oneby giving high to input, the output waveform will rise when the clock pulse falls. You note this ccd4042 that the situation was reversed ; when the C1 entry is on the level Lthe circuit is insensitive with the changes of levels H and L which appear on the entries.

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When Polarity set to High, on giving high pulse the output waveform will rise when the clock pulse is in falling state. High of page Preceding page Following page.


Using these last observations, you can supplement the table of operation of the CD which is thus presented as shown in the figure With this test, you noted that on each exit of the integrated circuit in question, you find the level present on the corresponding entry. The flip flop inside the CD IC works as per the table given below:. Observe the LEDyou note that they all are extinct ; in the contrary case, disconnect the food and re-examine the connections carried out. We can control the Output from any of the Four Switches preset in the circuit.

This is the multi-switch circuit which is taking input from the Data pin D0. The operation of the quadruple latch that you have just examined can ultimately be summarized as follows: Next Article Timer IC. Static page of welcome. Return to the synopsis.

The logic diagram and truth table of the IC is given below: Top menu About Us Advertise. Click here for the following lesson or in the synopsis envisaged to this end. These two entries have a function similar to the entry C of rocker R. There are four Flip-flops present inside IC, each strobe by a common clock.

The connections of the CD that we have just described are easily controllable on the practical diagram of the figure a like on the cd40422 diagram of the figure b. To contact the author.

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Therefore, if for example the Q1 exit is on the level Lexit 1 will be on cd4402 level H ; it is the same for Q2 and 2, Q3 and 3, Q4 and 4. The most common use of multi-way switching is for lighting systems and placed in the most common areas of a building like hallways, reception area, kitchen, living room and many cd402.


With the C1 entry on the level H and the C2 entry on the level Lthe circuit memorizes the last logical level present on the entry at the moment which immediately precedes that where the C1 entry passed from the level L on the level H. As the relay triggered the bulb or light turns ON cf4042 remain in ON state until the switch is released.

Multi-way switching is the most common method to be found in the electrical system. When Polarity set to Low, on giving high pulse the output waveform will rise when the clock pulse is in rising state.

CD – Quad Latch

It has four data input and each data input has two outputs. You can turn ON the light why pressing any of the four switches, which are set on different location in real.

Skip to main content. Xd4042 are many ways to perform Multi-way Switching. There are then two entries of validation C1 and C2 communes with the four rockers.

It has four Data input pins, each of them have two output inverting and non-inverting.