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. This 8-bit shift register features gated serial inputs and an asynchronous reset. The gated serial inputs (A and B) permit complete control over incoming data as a.

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If I have a shared clock signal for both the ICs which seems to be a common praticeAs stated when inputs are connected to output pins, NO pull ups. In a matter of speaking: Propagation Delay Time, Reset to Q. Thread starter schweini Start date Nov 16, This seems to contradict any basic understanding of physics I thought I had.

The 22nF are for the switch contacts, to eliminate any electrical noise, caused by switch contact bounce. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Forums New posts Search forums.

Datasheet «SN54/74LS164»

Fully Buffered Clock and Serial Inputs. Output Short Circuit Current. Low Level Output Voltage. You must log in or register to reply here.

Could I simply buy 74sl164 handful of the same ones, or does the difference actually make a huge difference, somehow? Just one last question i hope: For a better experience, please enable JavaScript in your browser before proceeding. High Level Output Current. What is the standard way of doing this?


High Level Input Current. I can’t seem to find one which includes a shift register? You beat me to the drawing – i tried it in OpenOffice Draw, and came up with the attached rudimentary image.

74LS 데이터시트(PDF) – System Logic Semiconductor

But with the inter-IC connection, I think my brain is still not in gear: The output pin can sink or source current, check the datasheet for your IC type. High Level Output Current.

Low Level Input Voltage. Data at the serial inputs may be changed while the clock is high or low, but only information dayasheet the setup requirements will be entered clocking occurs or the low-to-high level transition of the clock input. Not more than one output should be shorted at a time, and duration should not exceed one second.

74LS Datasheet(PDF) – System Logic Semiconductor

74lls164 would cause LEDs to flicker, or other weird thins to happen, i’d guess. I’m a software guy, who is now trying to get a little bit into circuits, just for fun.

Datasheets, Datasheet or Parts. When you connect the output from one IC to the input of another you do not have pull ups. I also posted this question over at Electronic Circuits on Discovercircuits. Functional operation should be restricted to the Recommended Operating Conditions.

The IC is a shift register so it does effectively have a latch function, any data in the SR is stored until the power is removed or its clocked out Hence, the input of my second IV would be high all the time thanks to the soon-to-be soldered pull-up.

Additionally, I wanted to add that: But everybody else seems to just hook these things up, and go with it. That didn’t nudge the 1.


Search field Part name Part description. That switch does NOT turn on the outputs – but touching that pin does. Again this is due to the fact that the clock pins is floating, use a pullup. If it still doesn’t work, post a schematic. This darasheet shift register features gated serial inputs and an. Media New media New comments Search media. All inputs are diode- clamped to minimize transmission-line effects.

74LS164 Datasheet PDF

Data at the serial inputs may be changed dqtasheet the clock is high or low, but only information meeting the setup requirements will be entered clocking occurs or the low-to-high level transition of the clock input. Click here to register now. The IC is very fast so you will [ or shouldn’t] see any flicker as the SR clocks. For anybody else with the idea of going the pull-DOWN route, i found this dataaheet that finally convinced me of my erroneous ways, which i’d like to share: Since I am still a bit datasheeet about the whole pull-down and pull-up thing I have read about it, but it still didn’t really sink inI tried the following: Maximum Ratings are those values beyond which damage to the device may occur.

I want to wire a 5×5 LED array, and then drive it with my PC, just for the heck of it, and the learning curve.

Low Level Input Current.