74HC08 PDF

3 Description. The SNx4HC08 devices contain four independent. 2-input AND gates. They perform the Boolean function Y = A ○ B or Y = A + B in positive logic. 74HC08 Datasheet, 74HC08 Quad 2-input AND Gate Datasheet, buy 74HC 74HC08D from NEXPERIA >> Specification: AND Gate, 74HC08, 2 Input, mA, 2 V to 6 V, SOIC

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Sign up or log in Sign up using Google. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Negative to resistor, resistor to GND.

If your parts are reallyand with no letters other than possibly L or LS in the middle, like 74LS04 they are bipolar TTL logic, and require a 5 volt power supply for 74gc08 operation. The 74HC parts can use a power supply between 2 volts and 6 volts.

Now remove the wire and connect pin1 to GND this time.

74HC08 AND Gate Example Circuit | Sully Station Technologies

Sign up using Email and Password. The inputs of bipolar TTL parts will usually appear as logic High 1 when not connected.


What can I do to test them? Here is the pinout diagram: By 74hc0 our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

If this gives you too much trouble mentally, use unused inverters to switch the input and output polarities. Sign up using Facebook.

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Circuit to test ICs at home? Positive of LED to pin 2.

Those parts are CMOS, so my 74hd08 paragraph applies. Connect an LED to pin 1 and pin 2 each along with current limiting resistors. You do need a current-lilmiting resistor Ohms or so in series with the LED, but with pin 1 tied to Vcc, the output of the inverter on pin 2 will be Low, so the LED won’t light. Here are circuits to use with, for instance, the and Peter Bennett 36k 1 28 Get the pinout correct. But keep the switch and LED connections as they are.

Negative to the GND via a resistor. Here is the pinout diagram:. Write the truth table, get the pinout and follow the same pattern. If the parts have a C in the middle 74C04 or 74HC04they are CMOS, and the inputs are very high impedance, and will be in an unknown state when not connected – they must 74hc0 connected to the positive supply for a High, and to ground for a Low.


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You are halfway through. 74h0c8 Questions Tags Users Unanswered. Then shouldn’t the diagram I drew above work? It 74hf08 important to give the correct part numbers! It’s just logic High and Low. Where should I connect the LED on pin 2 of ?

Now take a wire and connect pin1 to VCC. You can proceed like this for This verifies a working gate. TTL inputs are best driven by pulling them down or letting them be pulled up with a obvious name, here pullup resistor.

Seems like you got an arduino.