Looking for a latch

J

jack0987

Member

• Nov 13, 2010

• #1

I think what I want is a 4 bit latch similar in function to the 744511 except that, in this case, the four outputs will reflect the inputs when latched. High spped is not an issue.

Please suggest a part number.

 

ronv

Well-Known Member

Most Helpful Member

• Nov 13, 2010

• #2

Sounds like a plain set reset latch. 74279

 

Mikebits

Well-Known Member

• Nov 13, 2010

• #3

Can you even get TTL anymore? Sounds more like he needs a data latch. Something like the 74HC75.
https://www.electro-tech-online.com/custompdfs/2010/11/74HC75.pdf

 

J

jack0987

Member

• Nov 14, 2010

• #4

Thanks mike and ron.

I think a 74LS75 is the best choice for me. I am not sure yet if the latching takes place on the high or low transition like the 4511's that I am using for the display.

You mentioned that TTL is not used much anymore. i'm way behind the times, I guess.
Should I consider something else?

 

Mikebits

Well-Known Member

• Nov 14, 2010

• #5

What I mean by TTL not being used much anymore is the 7400 series. There are newer logic families that replaced the standard 7400 series. Have a look here for some info on logic families.

**broken link removed**

**broken link removed**

 

Last edited: Nov 14, 2010

J

jack0987

Member

• Nov 14, 2010

• #6

I understand now, Mike. Thanks. I will look at your reference. Thanks for that info, too.