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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Copyright ‘ Hitachi, Ltd. This product is not designed to be radiation resistant. With that the total drop across both transistors will be zero.
VCC-Connected to positive voltage to provide power to all four gates. Output of the gate is taken out from joint collector of both transistors. Here are a few cases why it is used. We can use one or all gates. Tokyo 03 Fax: In the circuit two transistors are connected to form a Datadheet gate.
When one of buttons is pressed.
Even within the guaranteed ranges, consider normally foreseeable. The buttons are connected to change the logic of inputs. This output is connected to a LED trough a current limiting resistor.
Now let us consider datsheet few states: For realizing the above truth table let us take simplified NOR gate and have it connected as shown below. Submitted by admin on 5 April Like this we can use each gate of the chip depending on requirement. After verifying the three states, you can tell that we have satisfied the above truth table. It is really popular and is available everywhere.
74LS02 Datasheet(PDF) – Fairchild Semiconductor
No one is permitted to reproduce or duplicate, in any form, the whole or part of datashete document without. The four NOR gates in the chip mentioned earlier are connected internally as shown below. Hitachi Asia Hong Kong Ltd. When both buttons are not pressed. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly.
Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Hitachi Semiconductor America Inc. Confirm that you have. The two inputs are driven out from bases of two transistors. Tun-Hwa North Road, Taipei Where high speed NOR operation is necessary. 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 7l4s02 of the Hitachi product.
The chipis basically used when NOR logic function is required. 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(PDF) – Hitachi Semiconductor
For further information write to: Confirm that you have received the latest product standards or specifications before final design, purchase or use. Because transistor drop is zero Y1 will be LOW. The chip also provides TTL outputs which are a must in some systems. The chip is available in different packages and is chosen depending on requirement. With them the switching delays of gates are minimized.
These two inputs are connected to buttons. Both transistors will be ON and voltage across both of them will be zero. Products and product specifications may be subject to change without notice. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. Hitachi bears no responsibility for failure or damage when used.
This LED is connected to detect the state of output. The chip has four NOR gates in it. The description for each pin is given below.
When both buttons are pressed. When you want logic inverter. TL — Programmable Reference Voltage. In that state the current flow through base of both transistors will be zero.