74HC76 DATASHEET PDF


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I’m using 74HC76 74c76 that contains two jk. Do not, ever, disconnect the VCC pin when debugging, because that breaks chips. On CMOS parts, all unused inputs must be connected, directly or through a resistor, to either Vcc or ground, whichever dahasheet required to make the part work as required. I’m building a simple ring counter with two jk flip-flop. Sign up using Email and Password. Sign up or log in Sign up using Google.

74HC76 Datasheet

It means that if I wire pin 5 to Vcc I got always 10 output. How do you ensure this?

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Sign up using Facebook. JK1 and JK2 need to initialize in opposite states, don’t they?

Thanks for your advice. 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.

Post as a guest Name. 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. Home Questions Tags Users Unanswered. I initialize the first jk with 1 using a button and preset and datasgeet pin.

74HC76 Datasheet PDF –

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. Email Required, but never shown.

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. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policydayasheet that your continued use of the website is subject to these policies.

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(PDF) 74HC76 Datasheet download

For the Preset pin where you have a switch to pull it to ground, you must also have a resistor 5K – 10K to Vcc to ensure the preset pin is high when the switch is not taking it low. About Preset and Clear pin I’m managing them well: This is my schematic very basic: If no what’s the matter of my circuit?

This is the integrated pinout: By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.