Part Number: 74LS, Maunfacturer: Motorola, Part Family: 74, File type: PDF, Document: Datasheet – semiconductor. These 8-bit shift registers feature gated serial inputs and an asynchronous clear. A low logic level at either input inhibits entry of the new data, and resets the first. It has 2N states where ‘N’ is the number of flip-flops. So here is how to make a Johnson counter using IC 74LS Here are some of the features of IC
|Published (Last):||5 June 2018|
|PDF File Size:||15.64 Mb|
|ePub File Size:||5.15 Mb|
|Price:||Free* [*Free Regsitration Required]|
The extreme top left pin from the printed side is the first pin in the order, 744ls164 the pin just opposite to it on the other row is the last or the 14 th pin.
74LS Datasheet pdf – 8-Bit Serial In/Parallel Out Shift Register – Fairchild Semiconductor
Referring to the figure on the left we see that externally it looks just like an ordinary pin dual in-line chip. All inputs are diode- clamped to minimize transmission-line effects. High Level Input Voltage.
Fully Buffered Clock and Serial Inputs. Not more than one output should be shorted at a time, and duration should not exceed one second.
Data at the serial inputs may be changed while the clock is high 74le164 low, but only information meeting the setup requirements will be entered clocking 74ls1164 or the low-to-high level transition of the clock input.
All diodes are 1N or 1N Similarly the IC requires only an external clock signal to make its outputs swing into action and produce interesting logic sequences. High Level Output Voltage.
74LS164 – 8-Bit Shift Register Ser In/Para Out
The serial inputs pin 1 and 2 of the IC has a special purpose of resetting the above procedure in an interesting pattern. Propagation Delay Time, Clock to Q. Through a few of my previous articles I have tried to cover the working principles of iic couple of versatile ICs like the and Now suppose if through a simple wiring pins 1 and 2 are configured in such a way that when the last pin 13 of the IC goes high while sequencing serially, it grounds the serial input 1 and 2.
Low Level Output Voltage. The whole output array, instead of shutting down all datazheet, now starts receding sequentially one-next-to-the-other, until all of them are shut down to begin the cycle all over again.
Search field Part name Part description. Hopefully you will get to see another article pretty soon, which will explain 47ls164 practical utility of this wonderful IC.
High Level Input Current.
74LS – Integrated Circuits > 74 Series – Electronic Component
High Level Output Current. The gated datasheett inputs A and B permit complete control over incoming data as a low at either or both input s inhibits entry of the new data and resets the first flip flop to the low level at the next clock pulse.
Hold Time, Clock to A1 or A2. Introduction Through a few of my previous articles I datawheet tried to cover the working principles of a couple of versatile ICs like the and Unlike ordinary CMOS ICs which has also been discussed in many of my previous articlesthe above ICs are equipped with many different built-in features which may be accessed or activated by just applying the appropriate logic inputs or components to their relevant pin-outs.
This opposite sequencing also takes place in accordance to the rising pulse of the input clocks. A high level input enables the other input which will then determine the state of the first flip-flop.
Low Level Output Current.
How Would You Build Moving LED Signs Using IC 74LS164? Pin-Outs Explored
For example if the pin — outs 1 and 2 are 74sl164 connected to the positive supply and the reset pin is joined to the last output of the IC pin 13then, as discussed earlier, once all the outputs become high the last pin 13 instantly resets the whole circuit, shutting the whole array of outputs, and the cycle repeats.
Low Level Input Voltage. This 8-bit shift register features gated serial inputs and an.
Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions.
Propagation Delay Time, Reset to Q. Setup Time, A1 or A2 to Clock. Output Short Circuit Current. Low Level Input Current.