description. The 74AC circuit is designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation. A. ACTIVE. LCCC. FK. 1. TBD. POST-PLATE. N / A for Pkg Type. – 55 to A. SNJ54LS. FK. EA. ACTIVE. Product data sheet. 2 of NXP Semiconductors. 74HC; 74HCT 3-to-8 line decoder/demultiplexer. 3. Ordering information. 4. Functional diagram.

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Does it matter if I use a 74hc, 74hct, 74ac, etc.? Please do not ask for unpaid help via PM, use the forum. OK, quick family survey: The important point is to have the non-inverted input at pin 6. CMOS Technology file 1.

Datasheet, PDF – Alldatasheet

Now with Unlimited Eagle board sizes! CrossRoads on Nov 07, I apologize for not being clear enough.

When using CC and will be perfectly matched. Turn on power triac – proposed circuit analysis 0. Can anybody fix the model.


HC family is a good all-round choice, will work at 3V3 as well as 5V, good output drive, fast, low power, cheap Last edited by jayanth. You don’t need to know those as such, only the knock-on effect. Dec 248: PV charger battery circuit 4.

Read the data sheets for the differences. Sounds like you are asking for an obvious feature of the said chips. The project is really a 24×16 LED matrix. How reliable is it? Losses in inductor of a boost converter 9. MarkT Brattain Member Posts: Digital multimeter appears to have measured voltages lower than expected. The time now is All have the same pinouts. I believe that ‘ style encoders only have 1 pin true at a time, meaning you’ll need to continually scan the Leds, You might be better off using 8-bit latches instead.

Equating complex number interms of the other 6. In Proteus model, E1 is normal and E2 and E3 are bubbled.

Ignoring the pin namings do they operate as shown in the symbol the invered ones as inverted and the non inverting as non inverting? Do you know what the voltage drop of the LED is mA? I need to completely turn off the outputs without changing the output state dtasheet.


I connected E1, E2, E3 together to a logic toggle and tried giving 1 and 0. Thanks everybody for your comments.

You can get these from the data sheet for the device. Consider reading this before posting: If somebody has the right model please upload it. Currently their gates are connected directly to the pins of the ‘s and other posts here etc. Wouldn’t that voltage propagate backwards and hurt the 74AC?

33 Fantastic 74238 Datasheet

But yes, specific LED driving buffer chips would be far better. I need extra NOT gates? Dec 242: What is your connection, Did you dstasheet inversion or directly connected?? See page 2 here.