74LS Absolute Maximum Ratings(Note 1). Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be. 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. 74LS02 datasheet, 74LS02 pdf, 74LS02 data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Quad 2-Input NOR Gate.

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Here are a few cases why it is used.

74LS02 Datasheet pdf – Quad 2-Input NOR Gate – Fairchild Semiconductor

Hitachi Asia Hong Kong Ltd. The two inputs are driven out from bases of two transistors.

Output of the gate is taken out from joint collector of both transistors. The buttons are connected to change the logic of inputs. Confirm that datashet have received the latest product standards or specifications before final design, purchase or use.

Tun-Hwa North Road, Taipei The chip is available in different packages and is dataasheet depending on requirement. With them the switching delays of gates are minimized.

VCC-Connected to positive voltage to provide power to all four gates. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. For further information write to: Even within the guaranteed ranges, consider 74ls0 foreseeable. Where high speed NOR operation is necessary. Now let us consider a few states: Copyright ‘ Hitachi, Ltd.


Because transistor drop is zero Y1 will be LOW. When you want logic inverter. Hitachi makes every attempt to ensure that its products are of high quality and reliability. Tokyo datashfet Fax: With that the total drop across both transistors will be zero. Confirm that you have. The description for each pin is given below. The four NOR gates in the chip mentioned earlier are connected internally as shown below. TL — Programmable Reference Voltage.

Hitachi bears no responsibility for failure or damage when used.

Because of this the chip can be used high speed applications. For realizing the above truth table let us take simplified NOR gate and have it connected as shown below. When both buttons are pressed.

It is really popular and is available everywhere.

Datasheet «SN54/74LS02»

When one of buttons is pressed. In the circuit two transistors are connected to form a NOR gate.

This product is not designed to be radiation resistant. These two inputs are connected to buttons. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly.

Products and product specifications may be subject to change without notice. In that state the current flow through base of both transistors datashewt be eatasheet. Like this we can use each gate of the chip depending on requirement. When both buttons are not pressed. Both transistors will be ON and voltage across both of them will be zero. Submitted by admin on 5 April The chip also provides TTL outputs which are a must in some systems.

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Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices 74ks02 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.

Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Hitachi Semiconductor America Inc. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without. This output is connected to a LED trough a current limiting resistor.

Search Results for 74LS02 : 2 documents found

This LED is connected to detect datasheett state of output. The chip has four NOR gates in it. We can use one or all gates. 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.

After verifying the three states, you can tell that we have satisfied the above truth table. The chipis basically used when NOR logic function is required.