HEF4017BP DATASHEET PDF

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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Kris Bahnsen Only Q2 seems problematic. The rest are working as expected. Do all datwsheet the other channels behave as expected? It came in stuck to a conductive “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 replaced the circuit and it works fine now, but I tested your idea and with it, I get the described behavior.

It would explain exactly the behavior you describe. So am I missing something or is the part damaged? The picture shows how current would flow if e. The downside is that, LED drive wise, the Schmitt version can not pull fatasheet skin off a rice pudding.

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HEFBP Datasheet PDF – Philips Electronics

Email Required, but never shown. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Sign up using Email and Password. I removed the pin 12 LED and there were no changes to behavior.

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Yes, it is shown as buffered, but Not shown on the schematic is the decoupling capacitor, also nF.

Sign up or log in Sign up using Google. Although a only hsf4017bp through ten states, there are 32 states in which it might power up if reset is grounded. 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.

HEF4017BP PDF Datasheet浏览和下载

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. One should not be surprised if a acts strangely on startup, though it should start acting normally within 11 hef4017p, or if a reset pulse is received.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. In the end, I’ll be driving the pin from a microcontroller. A look at the data sheet shows that the one you have is as bad or worse.

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So I’m using the pushbutton to hff4017bp the clock, the capacitor is there to help with debouncing and since the actual light level of the LEDs isn’t important for me, I’m using one resistor for all on them.

HEFBP NXP Semiconductors, HEFBP Datasheet

I picked LEDs just to play a little bit with the device and this seems to be the Hello World project for Russell McMahon k 9 Sign up using Facebook. Strange behavior from a Johnson counter Ask Question. Would a Schmitt trigger be needed even then?

YMMV but may not. Instead of that happening, Q2 is always on, except when it should be on. I’m expecting the counter to go through the LEDs as described in this diagram from the datasheet:.

Looks like that could be the result. A microcontroller driven clock will not bounce, so no Scmitt needed. Is Q2 the only one out of place? The other outputs are behaving normally.

In those cases, it’s off. I’m expecting the counter to go through the LEDs as described in this diagram from the datasheet: I’m actually planning to use this to drive some transistors, so the current I’m getting right now is more than enough.