HEF 4027 PDF

RS Stock No. Image representative of range only. Product Details. Maximum Operating Temperature. Number of Elements per Chip. Minimum Operating Supply Voltage.

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Electronics experimenters are always looking for innovative ways to use integrated circuits ICs or "chips" in electronics jargon. Engineers design chips to be versatile, so they can be used in millions literally of applications.

Two such chips are the and the ICs. They can be configured in wired in an almost infinite amount of circuitry, and experimenters are only limited by their creativity. Multivibrator means the output is a square wave. A square wave has definite on and off times, so it looks like a series of squares on an oscilloscope screen. Astable means when you turn on a switch wired to the chip, called a trigger, the chip produces an output.

When you turn off the trigger, the output stops. Keep in mind the trigger may be electronically controlled by other circuitry. Astable means it produces an output all the time, without a trigger.

Literally millions of projects exist for the Because it produces a very precise timed square wave output, it can be used as a reference or calibration wave. Many timing circuits can be triggered by a Some examples would be frequency counters, frequency doublers or dividers, and time delay circuits.

Suppose you want an automatic door to open, stay open for three minutes and close. A could be used in the timer circuit to control other electronics that control the motor on the door. The series is a dual J K flip-flop. Dual means there are two flip-flops within the same housing.

A flip-flop is the basis for all computer memory circuitry. Q and Q-not are opposite of each other. If a voltage is present at Q, no voltage appears at Q-not, and vice versa. Depending on how the inputs are configured, the outputs at Q and Q-not remember the last state they were in. A computer has literally millions of flip-flops all interacting with each other. All digital circuitry depends on the basic building block of the flip-flop.

The is really a training chip. Most computer chips have tens of thousands of flip-flops housed within a singe case. By wiring LEDs to the inputs and outputs, you can see for yourself how a flip-flop works. Some simple circuitry you could build with flip-flops could be a numerical display driver, or a ripple binary counter. A ripple binary counter is a counter that displays, on a numerical display, every input pulse.

For example, people going through a turnstile could trigger either the J or the K input. Tony Oldhand has been technical writing since He has worked in the skilled trades and diversified into Human Services in , working with the developmentally disabled. He is also heavily involved in auto restoration and in the do-it-yourself sector of craftsman trades.

Oldhand has an associate degree in electronics and has studied management at the State University of New York. About the Author. Photo Credits. Copyright Leaf Group Ltd.

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Electronic component datasheet for HEF manufacturer Philips. Free doqnload!. Interest will be charged hfe your account from the purchase date if the balance is not paid in full within 6 months. Sign in to check out Check out as guest.

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