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. 74LSN Datasheet, 74LSN PDF, 74LSN Data sheet, 74LSN manual, 74LSN pdf, 74LSN, datenblatt, Electronics 74LSN, alldatasheet. Pin and function compatible with 74LS .. without limitation, this document, the specifications, the data sheets and application notes.

Author: Taukree Mukus
Country: Czech Republic
Language: English (Spanish)
Genre: Career
Published (Last): 14 June 2006
Pages: 390
PDF File Size: 14.84 Mb
ePub File Size: 13.53 Mb
ISBN: 293-1-56110-177-3
Downloads: 15064
Price: Free* [*Free Regsitration Required]
Uploader: Nile

74LS Datasheet(PDF) – Fairchild Semiconductor

Email required Address never made public. You can can also change it into pull down resistor network connection.

This is called Asynchronous Parallel Input. June 27, at 9: November 27, at 9: December 19, at Hi J Dacampo, Thanks. January 11, at 9: 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. This gives you a flexibility when to read the input to the shift registers. If you are using other display, you may need to change to code for the display.

Very nice But, with two 74hc cascade case, how would be the code datzsheet this case?? When the latch pin is HIGH the shift register is listening to its 8 parallel inputs.

July 31, at 5: Thanks for the kind words. You need a 0.

Why have you left out the decoupling capacitors? Synchronous Serial Input is the feature that allows the first shift register to receive and transmit the serial output from a second one.


December 19, at 9: Change the code to display it using your serial monitor. A change from low-to-high on the clock inhibit input should only be done when the clock input is high. Moreover, it can be cascaded, thus you can have any amount of input pins with only four pins with the help of this shift register.

In this example you’ll add a second shift register, doubling the number of input pins while still using the same number of pins on the Arduino. Besides, you want to stop reading the inputs while serially sending the output. The LS is a parallel-in or serial-in, serial-out shift register and has a complexity of 77 equivalent gates with gated clock inputs and an overriding clear input.

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

You can cascade a lot of shift register to get tons of inputs. However, it is recommended to operate the chip at 5V. Build your own Arduino Uno. The example below details how to use this system. Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon. Last but not least, a video catasheet showing the operation of 74HC Shift Register. Another pin that is useful especially when you want to cascade a few shift registers together, which is Serial Data Input DS.

Now, let us look into detail how to use the shift register.


74LS165N, 74LS165PC, 74LS166

To cascade between two 74HC shift register, all you need to do is to connect the Serial Output Pin 9 of first stage into Ratasheet Input Pin 10 of the second stage.

Join 1, other followers. There is more information about shifting in the ShiftOut tutorial. This will allow the system clock to be free running and the register stopped on command with the other clock input. J Dacampo November 27, at 9: The blue wire is going from the serial out pin pin 9 of the first shift register to the serial data input pin 14 of the second register. After discussing about the xatasheet and output pins, let us move on with the control pins. When the latch pin is LOW, it listens to the clock pin and passes information serially.

If supplementing your Arduino with an additional 8 digital inputs isn’t going to be enough for your project, you can have a second CD pass its information on to another CD which will stream all 16 bits of information to the Arduino.

When high, this input enables the serial data input and couples the eight flip-flops for serial shifting with each clock pulse. You are commenting using your Twitter account.

Sometimes you’ll end up needing more digital input than there are pins on your Arduino. This site uses cookies.