This device is an 8-bit serial shift register which shifts data in the direction of QA toward QH when clocked. Parallel-in access is made available by eight. Texas Instruments 74LS Counter Shift Registers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for Texas Instruments . 74LS 8-bit Parallel In/serial Output Shift Registers. This device an 8-bit serial shift register which shifts data in the direction of QA toward QH when clocked.

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From my understanding, you have the buttons well connected to the shift register and the output of shift register is also connected to the Arduino. To cascade between two 74HC shift register, all you need to do is to connect the Serial Output Pin 9 of first stage into Serial Input Pin 10 of the second stage. January dattasheet, at 9: You need a 0.

You are commenting using your Twitter account. The input pins of the shift registers are pin 11 to 14 D0 to D3 and pin 3 to pin 6 D4 to D7. Notify me of new comments via email.

74LS165 Datasheet PDF

Besides, you want to stop reading the inputs while serially sending the output. Join 1, other followers.

Now, let us look into detail how to use the shift register. ShiftIn data,clock,order — The data is the input pin on Arduino to read the output from shift register whereas the clock is the pin connected to shift register clock.


A summary of the shift register operation is shown is the timing diagram below. You can cascade a lot of shift register to get tons of inputs. December 1, at 8: Schematic on how to cascade the shift register will be shown later on.

74LS Datasheet(PDF) – Fairchild Semiconductor

J Dacampo November 27, at 9: Hey zxlee, great article, It helped me a lot. November 19, at 2: Thanks for your kind reply… See I have followed you and understood your line 39 to 51 is printable characters.

Why have you left out 74os165 decoupling capacitors? Notice that I am using a pull up resistor of 10k ohm on all the inputs. Blog Statshits.

74LS165 PDF Datasheet浏览和下载

Maria November 19, at 2: One of the advantages that need to be stressed on is that by using only four pins, I can get eight input pins. Of course, you need to do some manipulation on the results that you obtained from each shiftIn. From there, if you able to read the correct input from your buttons, then its just the display code you need to work on. July 31, at 5: Leave a Reply Cancel reply Enter your comment here By continuing to use this website, you agree to their use.


To find 74lss165 more, including how to control cookies, see here: December 30, at 4: June 27, at 9: Last but not least, a video demo showing the operation of 74HC Shift Dataseet. If you need to code for a bigger project, I suggest try simpler example and slowly add in the other parts. Eatasheet you would like to cascade 74HC, the only modification you need to make is add the number of shiftIn depending on how vatasheet you are using. However, it is recommended to operate the chip at 5V.

74LS (FAIRCHILD) PDF技术资料下载 74LS 供应信息 IC Datasheet 数据表 (1/6 页)

However, you would need to set the clock enable before clocking out the 74ks165. Another thing that you can try is, first make sure you read what is exactly send from the shift register. Thanks for the kind words. Hi Sammy, please refer to the code in the article, line 39 to 51 is how the bits are converted into printable characters on the LCD. You are commenting using your WordPress. After discussing about the input and output pins, let us move on with the control pins.