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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The four NOR gates in the chip mentioned earlier are connected internally as shown below. This LED is connected to detect the state of output.
Products and product specifications may be subject to change without notice. We can use one or all gates. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi.
When both buttons are pressed. After verifying the three states, you can tell that we have satisfied the above truth table. This product is not designed to be radiation resistant. In the circuit two transistors are connected to form a NOR gate. Both transistors will be ON and voltage across both of them will be zero. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly. With that the total drop across both transistors will be zero.
These two inputs are connected to buttons. Confirm that you have. Hitachi makes every attempt to ensure that its products are of high quality and reliability. Submitted by admin on 5 April In that state the current flow through base of both transistors will be zero. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. The chip is available in different packages and is chosen depending on requirement. Like this we can use each gate of the chip depending on requirement.
The chip also provides TTL outputs which are a must in some systems. When you want logic inverter. With them the switching delays of gates are minimized.
74LS02 Datasheet pdf – Quad 2-Input NOR Gate – Fairchild Semiconductor
Because transistor drop is zero Y1 will be LOW. When both buttons are not pressed. Copyright ‘ Hitachi, Ltd. The two inputs are driven out from bases of two transistors. Datasheft description for each pin is given below. For further information write to: Because of this the chip can be used high speed applications.
The chip has four NOR gates in it.
PDF 74LS02 Datasheet ( Hoja de datos )
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 dataxheet consequential damage due to operation of the Hitachi product.
Output of the gate is taken out from joint collector of both transistors.
The buttons are connected to change the logic of inputs. It is really popular and is available everywhere. Tokyo 03 Fax: Hitachi bears no responsibility for failure or damage when used. For realizing the above truth table let us take simplified NOR gate and have it connected as shown below.
The chipis basically used when NOR logic function is required. Even within the guaranteed ranges, consider normally foreseeable. Confirm that you have received the latest product standards or specifications before final design, purchase or use. Hitachi Semiconductor America Inc. 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.
TL — Programmable Reference Voltage. Here are a few cases why it is used.
74LS02 Datasheet(PDF) – Hitachi Semiconductor
This output is connected to a LED trough a current limiting resistor. When one of buttons is pressed.
Hitachi Asia Hong Kong Ltd. Now let us consider a few states: Where high speed NOR operation is necessary. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without. VCC-Connected to positive voltage to provide power to all four gates. Tun-Hwa North Road, Taipei