LA 7555 timer

Thread Starter


Joined Mar 10, 2015
Hi, everyone,

I have been having problems with the original 555 timer (version NE555). On the Internet, I found out that this is a common problem: when the power supply's voltage suddenly changes, a false triggering occurs. Also, I read about the CMOS versions of 555 and their "immunity" to this problem. I want to use a CMOS 555 timer, but in my city I can only find the LA7555 CI. Google tells me much about some versions as ICM7555, LMC555 or TLC555, but little about LA7555. Even by the datasheet I couldn't have many conclusions. Do you guys know something about the LA timer? Is it as good as the other ones seem to be? Is it worth buying?


Joined Aug 23, 2012
I can't find any other id number as LA7555, so I think LA7555 is not one kind of NE555 or CMOS type, it is an IF Signal Processing (VIF+SIF) Cricuit for TV/VCR Use.