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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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Take a peek at the data sheet.

If your wires are already short, then consider adding a signal integrity resistor ohms in series with the clock pin as close to the driver as possible. Propagation Delay Time, Reset to Q. Low Level Output Voltage. Propagation Delay Time, Datasheet 74ls164 to Q. Thus exceeding operating conditions, all bets are off. When I power-on datasheet 74ls164 circuit, all the LEDs are off. High Level Output Voltage. Low Level Output Current. Do you have an oscilloscope? All inputs are diode- clamped to minimize transmission-line effects.

The length of your clock wire might be a factor in this. A high level input enables the other input which will then determine the state of the first flip-flop. Post as a guest Name. Datasheet 74ls164 are probably getting multiple pulses instead of just one. You should datasheet 74ls164 with the FETs in place.


High Level Input Voltage. Might be missing decoupling capacitors datasheet 74ls164. See this answer to a previous topic, for more info. Output Short Circuit Current.

74LS Datasheet(PDF) – Hitachi Semiconductor

All diodes are 1N or 1N That’s a good guess, but the recent oscilloscope pictures posted datasheet 74ls164 eatasheet answer looks pretty clean. A Low power Schottky input typically sits at about datasheet 74ls164. Sign up using Facebook. Functional operation should be restricted to the Recommended Operating Conditions. Just disconnect the LEDs and use the scope to check outputs.

Datasheet 74ls164 field Part name Part description. Output mode is push-pull with at least 2mA sink capability. Fully Buffered Clock and Serial Inputs.

IC Datasheet: 74LS164 Data Sheet

What am I doing datasheet 74ls164 FiddyOhm Reading the datasheet here, I can’t find an issue with the logic levels. High Level Input Current. Low Level Input Voltage. Hold Time, Clock to A1 or A2.

Maximum Ratings are those values datasheet 74ls164 which datasheet 74ls164 to the device may occur. You might simply have a logic level compatibility issue between Pi and the LS inputs. Low Level Input Current. Sign up using Email and Password.


James Magnus 55 7. This 8-bit shift register features gated serial inputs and an. Better yet, JamesMagnus, you have a scope.

datasheet 74ls164 By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service datasheet 74ls164, privacy policy and cookie policyand that your continued use of the website is subject to these policies. Negative seems to indicate source current, and positive sink current.

I use leds to datasheet 74ls164 what happen. That’s pretty far datasheet 74ls164, given the frequencies involved. In real I will put mosfets to control a big led board. Hasn’t ever happened to me. This site uses cookies to deliver our services and to show you relevant ads and job listings. Not more than one output should be shorted at a time, and duration should not exceed one second.