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.

Author: Kegal Kigagul
Country: Egypt
Language: English (Spanish)
Genre: Business
Published (Last): 19 May 2005
Pages: 24
PDF File Size: 16.17 Mb
ePub File Size: 16.51 Mb
ISBN: 802-7-29099-410-2
Downloads: 56003
Price: Free* [*Free Regsitration Required]
Uploader: Daim

It’s a Proteus model error. HC family is a good all-round choice, will work at 3V3 as well as 5V, good output drive, fast, low power, cheap Currently their gates are connected directly to the pins of the ‘s and other posts here etc.

The time now is Which is the differences in what is known as the “Static Discipline”. MarkT Brattain Member Posts: The pins E1 and E2 are inverted and E3 is normal in datasheet. I 774238 for not being clear enough. Originally Posted by jayanth.

74HC and 74HC Proteus model

Last edited by FvM; 28th October at Please don’t make requests for help in private using PM. Synthesized tuning, Part 2: Distorted Sine output from Transformer 8. I’d like to use two 3: This is the set of voltage levels used for input and output logic values.


CMOS Technology file 1. What is your connection, Did you used inversion or directly connected?? Sounds like you are asking for an obvious feature of the said chips. LS is Datasjeet shottky. Wouldn’t that voltage propagate backwards and hurt the 74AC? Don’t use if can be helped. How to control the outputs by using one line for all the 3 ENx pins? Yes, logic outputs are best protected from current spikes caused by trying to try and drive dagasheet capacitance of more than a couple of hundred pF.

Do you know what the voltage drop of the LED is mA?

Originally Posted by FvM. Dec 242: Similar Threads adout decoder 74HC CrossRoads on Nov 07, In Proteus model, E1 is normal and E2 and E3 are bubbled. Heat sinks, Part 2: While I agree with the above statements, none of them actually answer the OP’s original question. Consider reading this before posting: Which Datasheey mosfets are you using – in particular, are they meant for 5V gate drive, and do they have a low enough Rds on at 1.

Ignoring the pin namings do they operate as shown datasheeet the symbol the invered ones as inverted and the non inverting as non inverting?

Read times previous topic – next topic.

33 Fantastic Datasheet – friv2hub

Formal verification of safety-critical software, software development, and electronic design and prototyping. See page 2 here. 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. I need to completely turn off the 742238 without changing the output state i.


All have the same pinouts.

How reliable is it? Dec 248: In model E1 is normal and E2 and E3 are inverted. PNP transistor not working 2. Alternatively, I could redesign using 74HCs non-inverting version of the and use N-channel logic level MOSFETs with a pulldown resistor to ground, would that be a better way to go?

Now with Unlimited Eagle board sizes! Create a thread in the forum so that other members can benefit from the posted answers. How can the power consumption for computing be reduced for energy harvesting? I connected E1, E2, E3 together to a logic toggle and tried giving 1 and 0.

33 Fantastic 74238 Datasheet

Losses in inductor of a boost converter 9. Does it matter if I use a 74hc, 74hct, 74ac, etc.? Choosing IC with EN signal 2. OK, quick family survey: Last edited by jayanth. The outputs doesn’t change state. How do you get an MCU design to market quickly?