74LS02 PDF

Nekazahn With that the total drop across both transistors will be zero. This LED is connected to detect the state of output. Products and product specifications may be subject to change without notice. VCC-Connected to positive voltage to provide power to all four gates. The description for each pin is given below. Confirm that you have received the latest product standards or specifications before final design, purchase or use.

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Dasida Now let us consider a few states: No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. VCC-Connected to positive voltage to provide power to all four gates. In the circuit two transistors are connected to form a NOR gate. This LED is connected to detect the state of output. The four NOR gates in the chip mentioned earlier are connected internally as shown below.

Even within the guaranteed ranges, consider normally foreseeable. With them the switching delays of gates are minimized. Submitted by admin on 5 April When you want logic inverter. The chip has four NOR gates in it. Hitachi bears no responsibility for failure or damage when used. It is really popular and is available everywhere. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges.

After verifying the three states, you can tell that we have satisfied the above truth table. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly. Both transistors will be ON and voltage across both of them will be zero. We can use one or all gates. The chip also provides TTL outputs which are a must in some systems. Confirm that you have received the latest product standards or specifications before final design, purchase or use.

The two inputs are driven out from bases of two transistors. For realizing the above truth table let us take simplified NOR gate and have it connected as shown below. This product is not designed to be radiation resistant. Products and product specifications may be subject to change without notice.

Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as fail- safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product.

Confirm that you have. When both buttons are not pressed. The buttons are connected to change the logic of inputs. Output of the gate is taken out from joint collector of both transistors.

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