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SN74LS02N. SN74LS02NSR. ACTIVE. SO. NS. Green (RoHS. & no Sb /Br). CU NIPDAU. LevelC-UNLIM. 0 to 74LS 74LS02 is a LOGIC GATE IC and member of 74XXYY IC series which are logic Where to use 74LS02 IC 74LS02 NOR Gate IC Datasheet. Free 74LS02 semiconductor datasheets. Datasheet search.

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Because transistor drop is zero Y1 will be LOW. We can use one or all gates. Both transistors will be ON and voltage across both of them will be zero.

IC Datasheet: 74LS02 : Free Download, Borrow, and Streaming : Internet Archive

The description for each datashee is given below. Hitachi Asia Hong Kong Ltd. In that state the current flow through base of both transistors will be zero. Hitachi Semiconductor America Inc. After verifying the three states, you can tell that we have satisfied the above truth table.

The chip also provides TTL outputs which are a must in some systems. Confirm that you have received the latest product standards or 74lss02 before final design, purchase or use.

When both buttons are pressed. Even within datashheet guaranteed ranges, consider normally foreseeable. Tokyo 03 Fax: Hitachi makes every attempt to ensure that its products are of high quality and reliability.


PDF 74LS02 Datasheet ( Hoja de datos )

Hitachi bears no responsibility for failure or 47ls02 when used. Because of this the chip can be used high speed applications. VCC-Connected to positive voltage to provide power to all four gates. The four NOR gates in the chip mentioned earlier are connected internally as shown below.

Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Here are a few cases why it is used. When both buttons are not pressed. The buttons are connected to change the logic of inputs.

With them the switching delays of gates are minimized. Like this we can use each dataeheet of the chip depending on requirement. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly. In the circuit two transistors are connected to form a NOR gate. Confirm that you have.

Copyright ‘ Hitachi, Ltd.

Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics.

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.


Output of the gate is taken out from joint collector of both transistors. For realizing the above truth table let us take simplified NOR gate and have it connected as shown below. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi.

Now let us consider a few states: When one of buttons is pressed. It is really popular and is available everywhere. This output is connected to a LED trough a current limiting resistor. The chip has four NOR gates in it. With that the total drop across both transistors will be zero. For further information write to: Submitted by admin on 5 April This LED is connected to detect the state of output.

Products and product specifications may be subject to change without notice.

74LS02 datasheet & applicatoin notes – Datasheet Archive

Where high speed NOR operation is necessary. The two inputs are driven out from bases of two transistors. The chipis basically used when NOR logic function is required.