HEFBP, Nexperia Counter ICs 5-ST JOHNSON COUNTER datasheet, inventory, & pricing. Jan 4, 5-stage Johnson counter. For a complete data sheet, please also download: HEFBP(N): lead DIL; plastic (SOT). HEFBD(F). HEFBP HEFB; 5-stage Johnson Counter;; Package: SOT (DIP16). For a complete data sheet, please also download. The IC04 LOCMOS.
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The other outputs are behaving normally. I removed the pin 12 LED and there were no changes to behavior. The rest are working as expected. Although a only cycles through ten states, there are 32 states in which it might power up if reset is grounded. I replaced the circuit and it works fine now, but I tested your idea datashete with it, I get the described behavior.
HEF4017BP PDF Datasheet浏览和下载
The picture shows how current would flow if e. A look at the data sheet shows that the one you have is as bad or worse. YMMV but may not.
Strange behavior from a Johnson counter Ask Question. It came in stuck to a datashfet “sponge” in an antistatic bag and I took the time to touch a grounded object before actually doing anything with it, so it shouldn’t be damaged by ESD. I’m actually planning to use this to drive some transistors, so the current I’m getting right now is more than enough.
A microcontroller driven clock will not bounce, so no Dataseet needed. In the end, I’ll be driving the pin from a microcontroller. Home Questions Tags Users Unanswered.
HEFBP Datasheet(PDF) – NXP Semiconductors
My reasonably xtensive experienc with this IC using a switch as a clock source is that the Schmitt version is needed. Kris Bahnsen Only Q2 seems problematic.
Instead of that happening, Q2 is always on, except when it should be on. Post as a guest Name.
Sign datahseet using Facebook. Email Required, but never shown. The downside is that, LED drive wise, the Schmitt version can not pull the skin off a rice pudding. Do all of the other channels behave as expected?
I guess the polarity of the LED at Q2 is wrong. I’m expecting the counter to go through the LEDs as described in this diagram from the datasheet: The design of the chip is such that if it’s in one of the 22 weird states it will progress to a “legitimate” state within 11 clock pulses. Would a Schmitt trigger be needed even then?
Russell McMahon k 9 Yes, it is shown as buffered, but Sign up using Email and Password.