Uln2074b

[Daemon]

hi

Is there any difference between the ULN2074B and the ULN2074NE?

Aside from the fact one is made by Texas instruments I cant see much difference. Would the NE work in the LEDTRIKS?

Thanks
Steve

[dslynx]

None of the datasheet catalogs have a datasheet specific to ULN2074NE that I could find. I decided against paying $3 per chip for a 1.5a driver and ordered a couple of 500ma drivers that "can be paralleled for higher current" per the datasheet @ $.37 each for testing, hopefully it works out.

[Daemon]

I think this is the link here
http://www.datasheetarchive.com/ULN2...datasheet.html
Apart from the manufacturer it looks the same as the allegro one to me.

[dslynx]

Yeah, that datasheet is the same as the rest, it doesn't specify NE at all. Normally, if it matters, they will have a note stating NE version does "blah".. Comparing that datasheet to the ULN2074B real quick, the specs look the same to me. Even the schematic is the same, so it should be a perfect drop in replacement.

The math I did, 48 LEDs will draw 20ma each = 960ma for a row, so I'm betting on two 500ma's in parallel to power them (which are 8 switches per chip instead of only 4).. We'll see.

What's the cost of the TI version?

[Daemon]

The Texas instrument ones are only 1.50 each

[LightUp]

The one search I found had text (not a datasheet) indicating that "N" portion referred to a military version. Hence it would have a wider temperature range than a commercial spec, and be more expensive.

See bottom of page in;
http://www.datasheetarchive.com/ULN2...tml#specsheets

So, yes either chip will work in your display.