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
|Published (Last):||12 April 2014|
|PDF File Size:||14.23 Mb|
|ePub File Size:||9.14 Mb|
|Price:||Free* [*Free Regsitration Required]|
What can I do to test them? 74hc008 need to repeat it six times to check all gates. Here are circuits to use with, for instance, the and You can proceed like this for 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 74hf08 be Low, so the LED won’t light.
Write the truth table, get the pinout and follow the same pattern.
Similarly, you can think about all other ICs. Negative to resistor, resistor to GND. Post as a guest Name.
But keep the switch and LED connections as they are. The 74HC parts can use a power supply between 2 volts and 6 volts. It is important to give the correct part numbers!
Connect an LED to pin 1 and pin 2 each along with current limiting resistors. Peter Bennett 36k 1 28 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 correct operation. Where should I connect the LED on pin 2 of ?
This verifies a working gate. Circuit to test ICs at home?
Buy Products Online from China Wholesalers at
Whiskeyjack 3, 2 16 Sign up using Email and Password. It’s just logic High and Low. If this gives you too much trouble mentally, use unused inverters to switch the input and output polarities. Sign up or log in Sign up using Google.
You must connect the inputs directly to ground to have them seen as a Low 0.
Then shouldn’t the diagram I drew above work? Home Questions Tags Users Unanswered.