Down sizing from SN74HCT245N to SMD part

Thread Starter

marmil

Joined Oct 31, 2009
28
One of my hobbies is making small addressable LED displays (using pixels such as WS2812B or APA102) that run on 5V and use a 5V data signal. I have been using these SN74HCT245N transceivers to shift micro controller 3.3V signals up to 5V for the LEDs. It has always worked very well.

Now I want to try to make some more compact builds and will only need 2 inputs/2 outputs, instead of 8 channels. What would be a good surface mount part that could still reasonably be hand soldered? Any suggestions would be appreciated.
 

ronsimpson

Joined Oct 7, 2019
1,127
I was looking at this little buffer. Connect its supply to 3.3V and use a pull up resistor to 5V. Should level shift up.
I would go with the SOT-23 package because it is hand solder-able.
1598158141135.png
 

Thread Starter

marmil

Joined Oct 31, 2009
28
Thank you for the suggestion @ronsimpson
That looks good, and I'll even be able to hand solder it.

EDIT:
I finally got some and finaly got around to trying it out. Pretty small but I was able to hand solder it on my first try. Here's how I wired it and all worked fine.
SN74LVC2G07.jpg

While looking around I also ran across this TC4427 chip someone said they successfully used with addressable WS2812B LEDs. It comes in both PDIP-8 and SOIC-8.
TC4427 (listed at mouser.com)

The wiring was like this:
TC4427.jpg

Any other thoughts or comments are welcome.
Thank you
-marc
 
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