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.

Author: Faugis Akijas
Country: Martinique
Language: English (Spanish)
Genre: History
Published (Last): 25 May 2009
Pages: 80
PDF File Size: 8.86 Mb
ePub File Size: 1.40 Mb
ISBN: 917-9-41955-373-6
Downloads: 20040
Price: Free* [*Free Regsitration Required]
Uploader: Molkree

For realizing the above truth table let us take simplified NOR gate and have it connected as shown below. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. Confirm that you have. After verifying the three states, you can tell that we have satisfied the above truth table.

When one of buttons is pressed. This output is connected to a LED trough a current limiting resistor.


Where datsheet speed NOR operation is necessary. Output of the gate is taken out from joint collector of both transistors. In the circuit two transistors are connected to form a NOR gate.

Search Results for 74LS02 : 2 documents found

VCC-Connected to positive voltage to provide power to all four gates. For further information write to: Confirm that you have received the latest product standards or specifications before final design, purchase datasehet use.

Because transistor drop is zero Y1 will be LOW.

This product is not designed to be radiation resistant. Submitted by admin on 5 April Hitachi makes every attempt to ensure that its products are of high quality and reliability.

The four NOR gates in the chip mentioned earlier are connected internally as shown below. With that the total drop across both transistors will be zero.

Even within the guaranteed ranges, consider normally foreseeable. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly.

The chip also provides TTL outputs which are a must in some systems. We can use one or all gates. Hitachi Semiconductor America Inc.

74LS02 Datasheet PDF –

The description for each pin is given below. In that state the current flow through base of both transistors will be zero.


The chipis basically used when NOR logic function is required.

Hitachi Asia Hong Kong 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.

This LED is connected to detect the state of output.

PDF 74LS02 Datasheet ( Hoja de datos )

With them the switching delays of gates are minimized. Here are a few cases why it is used. The two inputs are driven out from bases of two transistors. The chip is available in different packages and is chosen depending on requirement.

The buttons are connected to change the logic datashset inputs.

These two inputs are connected to buttons. It is really popular and is available everywhere. Because of this the chip can be used high speed applications. When both buttons are not pressed.