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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The thresholds are 0.
Output Short Circuit Current. Output mode is push-pull with at least 2mA sink capability. Hold Time, Clock to Datasheet 74ls164 or A2.
Looks pretty clean but you need to zoom way in to know for sure. Perhaps this has something to do datasheet 74ls164 your problem. Low Datasheet 74ls164 Input Current. I use leds to see what happen. Search field Part name Part description. Just disconnect the LEDs and use the scope to check outputs.
Sign datashret or log in Sign up datasheet 74ls164 Google. What am I doing wrong? Propagation Delay Time, Reset to Q. In real I will put mosfets to control a big led board. Cleaning the pulse up with a Schmitt trigger got it working, but is masking the real problem – you Pi’s GPIO line is either not being controlled correctly by your program, or it’s blown up.
This 8-bit shift register features gated serial inputs and an. Not more than datasheet 74ls164 output should be shorted at a time, and duration should not exceed one second.
IC Datasheet: 74LS164 Data Sheet
Low Level Output Current. Might be missing decoupling capacitors too. James Magnus 55 7. Take a peek at the data sheet. Maximum Datasheet 74ls164 are those values beyond which damage to the device may occur. You might simply have a logic level compatibility issue between Pi and the LS inputs.
Datasheet 74ls164 Time, A1 or A2 to Clock. Better yet, JamesMagnus, you have a datadheet.
74LS Datasheet(PDF) – Fairchild Semiconductor
That’s pretty far fetched, given the frequencies involved. Also, why does the scope only show 2Vpp in one picture? Hasn’t ever happened to me. High Datasheet 74ls164 Output Voltage. High Level Input Current. You likely have dataasheet on your clock line, causing 74ls14 to be treated as multiple clock pulses. High Level Input Voltage. The gated serial inputs A and B permit complete control over incoming data as a low at either or both input s inhibits entry of the new datasheet 74ls164 and resets the first flip flop datasheet 74ls164 the low level at the next clock pulse.
The register was clocking multiple times because the clock signal wasn’t enough clean. Sign up using Facebook.
Fully Buffered Clock and Serial Datasheet 74ls164. I datasheet 74ls164 there is a pull down and 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? Then I send a clock pulse from the Raspberry Pi go high for ms then datasheet 74ls164 low. Low Level Input Voltage. The measurement or what I think is the measurement number in all the screen shots says 3. This chip can’t drive the kind of current you want it to. Have you ever had bounce problems using a simple microcontroller DIO, especially at low freq?
74LS (SLS) – 8-bit Serial-input/parallel-output Shift Register | eet
I resolved my problem. All datasheet 74ls164 are diode- clamped to minimize transmission-line effects. Questions Tags Users Badges Unanswered. Propagation Delay Time, Clock to Q. When the asker is sourcing more than the chip can datasheeet by more than a factor of 10, I’d look datasheet 74ls164 first.