recurrent problems with ths7314 for rgb bypass

Hi everyone, I write this to share my struggle

I usually perform rgb bypass with ths7314 for consoles like n64 or 1chip snes, drama is I have to use few of them before finding one that works. In most cases I got black screen so have to change ths7314 and is always a struggle having to solderin them on the soic adapter etc.

I'm pretty good at solderin but is a waste of time , sometimes it happens I have to do 5 or 6 chips before got right result

don't know if I have a defective batch or I'm doin something wrong like using temperature too hot in order to fry them

can share your experience with those chips? maybe you can help me findin the right way..thanks!

 

Are you maybe forgetting to add the 100nF cap?

 

of course not, as said in first post it works perfectly but only once every 5 attempts or so

 

Measure your chips for internal shorts. I had one bad ths7314 before, out of 3.

 

I'm pretty ignorant about it , how can I measure that, with multimeter? don't know how

 

Yes, with your meter. On my broken one, I had continuity between Vcc and 2 of the output (or input, forgot which) pins.
Basically check if any of the in/outputs are connected to Vcc or ground. If they are, the chip is fried.

 

doin some testings and that's a mess many got continuity between vcc or gnd and input/outputs

drama is I found one which has no continuity and it failed too....I think I'm losin my mind

 

Well, at least you know now which shop to avoid. Care to tell us where you got your batch?

 

of course, is polida2008 on ebay

can you suggest me some reliable sellers of those chips?

 

Well, I got mine on Ebay as well and the batch is fine so far. That doesn't mean much though. Chips from Ebay are hit and miss.
Try these maybe: http://www.ebay.com/itm/10pcs-THS7314DR-THS7314-ORIGINAL-TI-SOP-8-/261174893423

 

Order them from a reputable company like mouser or digikey. I used to buy them off eBay but stopped after getting bad ones. Have not had a bad one since.

 

I got a lot of defective chips, that sucks Just check continuity between RGB outputs and GND/5V, if it "beeps"...

 

thanks for sharing your experience, I think they are the only components I found defective in massive percentage...

 

I would suggest that you buy them from console5.