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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The description for each pin is given below. Here are a few cases why it is used.

Because of this the chip can be used high speed applications. The chip also provides TTL outputs which are a datawheet in some systems. In that state the current flow through base of both transistors will be zero. In the circuit two transistors are connected to form a NOR gate.

Confirm that you have. Hitachi Semiconductor America Inc.

74LS02 Datasheet

For realizing the above truth table let us take simplified NOR gate and have it connected as shown below. When both buttons are not pressed. The four NOR gates in the chip mentioned earlier are connected internally as shown below.

This output is connected to a LED trough a current limiting resistor. When you want logic inverter. Like this we can use each gate of the chip depending on requirement. It is really popular and is available everywhere. No one is permitted to reproduce or 74l02, in any form, the whole or part of this document without written approval from Hitachi.


Confirm that you have received the latest product standards or specifications before final design, purchase or use. TL — Programmable Reference Voltage. Tun-Hwa North Road, Taipei VCC-Connected to positive voltage to provide power to all four gates. When one of buttons is pressed. Because transistor drop is zero Y1 will be LOW. We can use one or all gates.

74LS02 Datasheet PDF

Hitachi makes every attempt to ensure that its products are of high quality and reliability. For further information write to: Design your application so that the product is used within the ranges guaranteed by Hitachi particularly.

This LED is connected to detect the state of output. The two inputs are driven out from bases of two transistors. Even within the guaranteed ranges, consider normally foreseeable. 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.


The chipis basically used when NOR logic function is required. With that the total drop across both transistors will be zero.

When both buttons are pressed. Products and product specifications may be subject to change without notice. Submitted by admin on 5 April 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.

74LS02 Datasheet

Both transistors will be ON and voltage across both of them will be zero. With them the switching delays of gates are minimized. Where high speed NOR operation is necessary.

The buttons are connected to change the logic of inputs.

These two inputs are connected to buttons. Output of the gate is taken out from joint collector of both transistors. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges.