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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Tokyo 03 Fax: This output is connected to a LED trough a current limiting resistor. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval dataasheet Hitachi.

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Copyright ‘ Hitachi, Ltd. Even daatsheet the guaranteed ranges, consider normally foreseeable. For further information write to: The four NOR gates in the chip mentioned earlier are connected internally as shown below. The chip has four NOR gates in it. The chip is available in different packages and is chosen depending on requirement. In that state the current flow through base of both transistors will be zero. Like this we can use each gate of the chip depending on requirement. Hitachi bears no responsibility dayasheet failure or damage when used.


When both buttons are not pressed. The chipis basically used when NOR logic function is required.

When both buttons are dayasheet. Where high speed NOR operation is necessary. Hitachi Semiconductor America Inc. Because transistor drop is zero Y1 will be LOW.

It is really popular and is available everywhere. TL — Programmable Reference Voltage.

74LS02 Datasheet(PDF) – Hitachi Semiconductor

Confirm that you have. Products and product specifications may be subject to change without notice. Output of the gate is taken out from joint collector of both transistors. The two inputs are driven out from bases of two transistors.

When one of buttons is pressed. We can datashfet one or all gates.

When you want logic inverter. Hitachi Asia Hong Kong Ltd. With them the switching delays of gates are minimized. Hitachi makes every attempt to ensure that its products are of high quality and reliability. This product is not designed to be radiation resistant. 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.

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. For realizing the above truth table let us take simplified NOR gate and have it connected as shown below.


In the circuit two transistors are connected to form a NOR gate. Now let us consider a few states: VCC-Connected to positive voltage to provide power to all four gates. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. 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.

Submitted by admin on 5 April The buttons are connected to change the logic of inputs.

The chip also provides TTL outputs which are a must 74lss02 some systems. The description for each pin is given below. This LED is connected to detect the state of output.

Tun-Hwa North Road, Taipei These two inputs are connected to buttons.