Each of these two Flip-Flops can be used individually based on our application. The flip-flops are also called as latching devices meaning it can remember one single bit of data and due to this ability the D-Flip Flops are used in time delay circuits, Sampling circuits and even as buffer circuits. So if you are looking for an IC for latching purpose or to act as a small programmable memory for your project then this IC might be the right choice for you. Using a Flip-Flop is pretty straight forward.

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It has buffered outputs that improve system performance. Data is sent out on the outputs on the positive edge transition of a clock pulse signal. It can tolerate a slow rise and fall times without causing any damage to the circuit due to the presence of Schmitt trigger action inputs. On the other hand, set-direct input and clear-direct input performs their irrespective of the values of Data input D and clock input CP.

Out of these 14 pins, six pins are assigned for each D type FF. However, power supply pins are the same for both. Pin 01, 1Q, 2Q Output pins that provide true outputs of the flip flops.

Pin 03, 1CP, 2CP The clock pulse pin provides a clock pulse as an input which sends the data on the output pins on positive edge transition.

Pin 05, 1D, 2D These pins act as a data input pin. Pin Vss Connect this pin to ground or 0 V. Pin VDD Connect this pin to a voltage supply. Static Flip-Flop operation. It operates at medium speed. For 10V supply, the clock toggle rate is 16 MHz. These devices are designed for use in shift register applications and for performing data and memory hold functions.

You can use this IC in designing counters or performing toggle operations by connecting the output pin to the data input of flip flop. How to use HEF? HEF is a simple dual flip flop IC that operates just like other flipflops. It changes output according to the data input, clear set input, and the clear direct input on every positive transition of a clock signal. In case of high to low transition of a clock, the outputs will not change.

These two flip flops store the data input values at outputs until they are changed. The table given below indicates the effect of changing inputs on outputs. Truth Table FF This table is for both flip flops. Set and reset functions are independent of the clock. Proteus Simulation Supply 5V to pin 14 and ground pin 7. Apply clock signal at pin 3 and pin 11 which can be obtained from timer IC or frequency generator.

The data input pin, clear data and set direct pin are connected to pull-down resistors as shown in the circuit below. You can connect LEDs to the outputs to observe their values. If the clear data and set data inputs are low, then the output value will not change, and it will retain the previous values. If both clear set pin and the set direct pin are high, only in that case both outputs will be high. Therefore, it can function as a toggle by connecting LED at outputs. When one LED is on, the other will be in off state.

HEF is used in computers and memory devices for storing bits. Equivalents and Alternatives.



Kazihn CDB consists of two identical, independent data-type flip-flops. Each of these two Flip-Flops can be used individually based on our application. CD dual D flip-flopdual in-line 14 feet. Dayasheet pin a can be used to clear the data and reset the flip flop by making it high.


HEF4013 Philips Semiconductors, HEF4013 Datasheet - Page 2



HEF4013 Philips Semiconductors, HEF4013 Datasheet



HEF4013 Dual D-type flip-flop IC


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