74HC76 DATASHEET PDF

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If no what’s the matter of my circuit?

Do not, ever, disconnect the VCC pin when debugging, because that 74hx76 chips. I’m building a simple ring counter with two jk flip-flop. I’ve a button that sets the starting 1 in the first jk, so I think that the problem isn’t about Preset or Clear pin.

I initialize the first jk with 1 using a button and preset and clear pin.

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Home Questions Tags Users Unanswered. Email Required, but never shown. On CMOS parts, 74h76 unused inputs must be connected, directly or through a resistor, to either Vcc or ground, whichever is required to make the part work 74ch76 required. Sign up or log in Sign up using Google. It means that if I wire pin 5 to Vcc I got always 10 output.

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I’m using 74HC76 integrated that contains two jk. Thanks for your advice.

JK1 and JK2 need to initialize in opposite states, don’t they? By using our site, you acknowledge that you have read and understand our Cookie Policy 74hc766, Privacy Policyand our Terms of Service. Sign up using Email and Password. For the Preset pin where you have a switch to pull it to ground, you must also have a resistor 5K – daatsheet to Vcc to ensure the preset pin is high when the switch is not taking it low.

The problem is that in the circuit that I’m observing on my desk the ring counter only works when pin 5 Vcc is unwired. About Preset and Clear pin I’m managing them well: How do you ensure this?

Without a resistor in series with each LED is is likely that the corresponding Q output is being dragged down to a voltage that is not high enough to be recognized as a legitimate high level by the following J input. This is the integrated pinout: 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.

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74HC76 Datasheet PDF Motorola => Freescale –

This is my schematic very basic: Sign up using Facebook. 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.

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