DATASHEET 74LS164 PDF DOWNLOAD

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. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, 8-Bit Serial In/Parallel Out Shift Register.

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Output Short Circuit Current.

IC Datasheet: 74LS164 Data Sheet

Not more than one output should be shorted fatasheet datasheet 74ls164 time, and duration should not exceed one second. Also, why does the scope only show 2Vpp in one picture? Output mode is push-pull with at least 2mA sink capability. Datasheet 74ls164 know there is a pull down datasbeet a pull up in the raspberry pi when you configure the GPIO as input, but is there a pull down when you are in output mode?

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Low Level Output Voltage. Fully Buffered Clock and Datasheet 74ls164 Inputs. Search field Part name Part description. Maximum Ratings are those values beyond which damage to the device may occur. In real I will put mosfets to control a datasheet 74ls164 led board.

Functional operation should be restricted to the Recommended Datasheet 74ls164 Conditions. Finding out where that offset comes from should be the absolute first priority here. The register was clocking multiple times because the clock signal wasn’t enough clean. Do you have an datasheet 74ls164 What am I doing wrong?

High Level Input Current. Low Level Input Current. Take a peek at the data sheet. Datahseet Reading the datasheet here, I can’t dtasheet an issue with the logic levels.

IC Datasheet: 74LS Data Sheet : Free Download, Borrow, and Streaming : Internet Archive

Perhaps this has something to do with your problem. The thresholds are 0.

This 8-bit shift register features gated serial inputs and an. When I power-on the circuit, all the LEDs are off.

Thus exceeding operating datasheet 74ls164, all bets are off. I resolved my datasheet 74ls164. Hold Time, Clock to A1 or A2. When the asker is sourcing more than the chip can do by more than a factor of 10, I’d look there first. A Low power Schottky input typically sits at about 1.

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I took some photos of the datashfet, the first is the clock from the GPIO without nothing and the second is the clock connected to the register. Looks pretty clean but you datasheet 74ls164 to zoom way in datasheet 74ls164 know for sure. Sign up using Facebook. Just disconnect the LEDs and use the scope to check outputs. Low Level Input Voltage. The measurement or what I think is the measurement number in all the screen shots says 3. Or, datasheet 74ls164 pulse has a ragged edge s and the is actually clocking several times.

You likely datasheet 74ls164 reflections on your clock line, causing it to be treated as multiple clock pulses. Questions Tags Users Badges Unanswered.

DATASHEET 74LS164 EPUB

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. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, 8-Bit Serial In/Parallel Out Shift Register.

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High Level Output Voltage. That’s pretty far fetched, given the frequencies involved. Datasheet 74ls164 ever happened to me. Cleaning the pulse up with a Schmitt trigger got it working, but is masking the real problem datasheet 74ls164 you Datasheet 74ls164 GPIO line is either not being controlled correctly by your program, or it’s blown up.

Output Short Circuit Current. Perhaps this has something to do with your problem. Also, why does the scope only show 2Vpp in one picture? Fully Buffered Clock and Serial Inputs. This chip can’t drive the kind datasheet 74ls164 current you want it to. Not more than one output should be shorted at a time, and duration should not exceed one second. See datasyeet answer to a previous topic, for more info. Maximum Ratings are those values beyond which damage to the device may occur.

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Sign up using Datasheet 74ls164. High Level Output Current. Low Level Input Current.

Or, the pulse has a ragged edge s and the datasheet 74ls164 actually clocking datasheet 74ls164 times. Setup Time, A1 or A2 to Clock. Output mode is push-pull with at least 2mA sink capability. The measurement or what I think is the measurement number in all the screen shots says 3. In real I will put mosfets to control a big led board. You might even need to replace the shift register, but probably not.

74LS (SLS) – 8-bit Serial-input/parallel-output Shift Register | eet

Do you have an oscilloscope? Looks pretty clean but you need to zoom datasheet 74ls164 in to know for sure. Low Level Output Current. Post as a guest Name. You have an unexplained 1V offset. Hold Time, Clock to A1 or A2. When the asker is sourcing more than the chip can do by more than a factor of 10, I’d look there first. Then I send a clock pulse datasheet 74ls164 the Raspberry Pi go high for ms then go low. Thanks for all your advices and suggestions, have a nice day.

Just datasheet 74ls164 the LEDs and use the scope to check outputs.

raspberry pi – 8-bit shift register 74LS not working – Electrical Engineering Stack Exchange

Questions Tags Users Badges Unanswered. Have you ever datasehet bounce problems using a simple microcontroller DIO, especially at low freq? Thus exceeding datasheet 74ls164 conditions, all bets are off.

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I took some photos of the scope, the first is the clock from the GPIO without nothing and the second is the clock connected to the datasheet 74ls164. By using 74,s164 site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

IC Datasheet: 74LS164

You might simply have a logic level compatibility issue between Pi and the LS inputs. Sign up or log in Sign up using Datasheet 74ls164.

Sign up using Email and Password. The register was clocking multiple times because datasheet 74ls164 clock signal wasn’t enough clean. You should test with the FETs in place. What am I doing datasheet 74ls164 Propagation Delay Time, Clock to Q. James Magnus 55 7. Low Level Datasheeh Voltage. Take a peek at the data sheet.

74LS164 Datasheet

Might be missing decoupling capacitors too. You are datasheet 74ls164 getting multiple pulses instead of just one.

The thresholds are 0.