HEF Datasheet, HEF PDF, HEF Data sheet, HEF manual, HEF pdf, HEF, datenblatt, Electronics HEF, alldatasheet, free. Oct 11, DATASHEET. Features. • High-Voltage Types (20V Rating). • CDBMS Triple 3-Input AND Gate (No longer available or supported). Data sheet acquired from Harris Semiconductor. SCHSC – Revised September The CDB, CDB, and CDB types are supplied in .

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This chip is different in pinout to the TTL andbut can fulfill the function of either if the wiring is modified.

Practical Electronics/IC/4081

The chip is basically used where AND logic operation is needed. The chip provides TTL outputs which are needed in some systems. The first method with require two ICs to implement, but a total of four gates can be made.

Policies and guidelines Contact us. When any one of the buttons is pressed. It is really popular and is available everywhere. The second will require only one IC, but only two gates can be made. There are four AND gates in the chip, we can use one or all gates simultaneously. For realizing the above truth table let us take a simple AND gate application circuit as shown below.


In the circuit two transistors are connected in series to form a AND gate. In other languages Add links. This page was last edited on 16 Decemberat The xatasheet working can be explained in few stages below: The chip is used in systems where high speed AND operation is needed. This is discussed on this page. At this time the total VCC appears across resistor R1. Both transistors will be ON and voltage across both of them will be zero.

HEFBP Datasheet pdf – Quad 2-input AND gate – NXP Semiconductors

Because total VCC appears across transistors the drop across resistor R1 will be zero. Output of the AND gate is the voltage across resistor R1. From Wikibooks, open books for an open world. A few mentioned below. For more information about the AND gate in general, see this module. With that the drop across resistor R1 will be zero. The two inputs of AND gate are driven out from bases of the two transistors.


After verifying the three states, you can tell that we have satisfied the above truth table. When both buttons are not pressed. The first is to use a NAND gate and invert the output.

For better understanding the internal working let us consider the simplified internal circuit of AND gate as shown below. Retrieved from ” https: The four AND gates in the chip mentioned earlier are connected internally as shown in diagram below.

These two inputs are connected to buttons to change the logic of inputs. Because of this the chip can be used for high speed AND operations. These are available from manufacturers.

The arrangement of the CMOS components is shown below:. Submitted by admin on 6 April This LED is connected to detect the state of output. Because output is nothing but voltage across resistor R1 it will be LOW.