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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This ensures that they cannot be accidentally pulled off the circuit easily. In this circuit a reset switch has been added. Try a higher resistor value to lower the current significantly, say 10mA.

International orders can only be shipped to the registered card address. Typical output drive at 5V: Same Day Dispatch Orders placed online before 3: Home Questions Tags Users Unanswered. If the goods are not in stock we will endeavour to contact you as soon as possible to discuss a dispatch date.


Alternatively you can choose the free collection option and have your own courier collect it from us. Add a timer to pulse the decade counter. If you spend over Add to Cart Details. As Tony mentions in his answer, if the LEDs have a typical forward voltage of 2 to 2. You can figure out the resistor value ddatasheet use by rearranging Ohm’s law: A good example is seen below.


Decade counter (4017B)

Problem with timer and counter Ask Question. That’s equivalent to 1.

If you spend between 40 and 48 – The outputs will change at one tenth the speed of the first B IC. You’ve verified that LED 0 is connected to pin 3, 1 to 2, 2 to 4, etc.

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The B Decade Counter

datasneet Thank you for your interest in this question. Max quiescent current at 5V: Write Your Own Review You’re reviewing: I added the source current graph to the answer. Because it has attracted low-quality dstasheet spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count.

Your schematic doesn’t match the “drawing. Max clock frequency at 5V: Linking the B ICs together in this way allows for long interval timers to be made.

For the given circuit current flows through LED if output is high the source current is relevant. Do you have the datasheet for your specific ? The LEDs won’t be as bright, but it might be within your ‘s current sinking ability and at least allow you to determine if things are working correctly.

If so, is it normally closed or normally open? Be the first to review this product. Also note that the timer never actually “stops” supplying voltage; it supplies a high voltage, and then it supplies a low voltage, repeatedly. These charges are usually billed to you directly from UPS. Delivery times vary for international orders depending on the service selected and the destination. The B is most useful when combined with a timer such as a based circuit.


Be the first to review this product Email to a Friend. Is that switch actually there? I’m a first year student of E. Curd You are correct, I had not paid attention to the schematic properly.

B Datasheet, PDF – Alldatasheet

The pulse from the IC is generated from pin 3. The B is an integrated circuit which has been designed to count pulses. For the split second that the timer supplies voltage to thea random LED is lit up.

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Counters such as the B are cheap and yet surprisingly useful. A 16 DIL pin Decade Counter with 10 decoded outputs and inputs including, clock, reset, and clock inhibit. Continuous pulsing by the IC results the LEDs of 40177b B turning on and off in sequence, creating a ripple effect.

The diagram shows the sink current. You can see the delivery time and cost at the shipping stage, or by using the shipping estimator from within the shipping basket. Supplying no voltage requires either a high-impedance output or leaving an input pin floating. Sign up to our newsletter for promotions.

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