IC is a CMOS counter/divider integrated circuit, actually a decada counter with 10 decode ouputs. It is 5 stage Johnson counters having 10 decoded. DESCRIPTION. The HCFB is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise .

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Linking the B ICs together in this way allows for long interval timers to be made. A astable circuit is used to pulse the B at regular intervals. JavaScript seems to be disabled in your browser. The IC can provide up to Same Day Dispatch Orders placed online before 3: The B is most useful when combined with a timer such as a based circuit. Click ask a question to be the first.


I didn’t include any of the switches from the picture. Sign up to our newsletter for promotions. Product Description The decade counter has ten output lines, one to represent each of the numbers 0 to 9, there is also a carry out line which goes high as the counter goes from 9 back round to 0. Max clock frequency at 5V: Alternatively you can choose the free collection option and have your own courier collect it from us.


I’m a first year student of E. That’s equivalent to 1. International orders can only be shipped to the registered card address.

Decade counter (B)

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As Tony mentions in his answer, if the LEDs have a typical forward voltage of 2 to 2. In this circuit a reset switch has been added.

Is that switch actually there? The pulse from the IC is generated from pin 3.

Typical output drive at 5V: If that works, and you want to make them brighter, you’ll need to either find a that has greater current ratings on the output pins or add some transistors. Thank you for your interest in this question.

We do not charge a packaging or handling fee for this service, and you will receive an email when your order has been processed, you can collect half an hour after receipt of this email.

Didn’t think about that.

Write Your Own Review You’re reviewing: Collection If you would like to collect your order, or use your own courier then there is an option you can select during checkout. I added the source current graph to the answer. IgnacioVazquez-Abrams I didn’t know that. Rest of the world These orders are sent via UPS, and the cost is dependant on the service you choose at checkout. A number of B IC circuits can be connected together by connecting pin 10 divide by 10 pin to the input on the next B IC.


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The diagram shows the sink current. Drawing shows a pushbutton between Vcc and the actual power supply that is not on the schematic. They can be used in timing circuits and 4017n often used to switch on and off LEDs or motors or other circuits.

For a list of postcodes that will be charged the remote location rate click here. As long as the clock inhibit is held low, upon a rising edge of the clock pin the output will count up from zero, one number at a time for each rising edge on the clock pin. However the LED’s flash in random datasueet. Try a higher resistor value to lower the current significantly, say 10mA.

Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count. The pulse from the timer can be used to activate the B circuit.

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