ed - just a thought - what is your supply voltage and what is the value of the resistor in series with the LED?
Try to get some and you will ended up with fake eBay parts.
It is more safe to build one,original for sure.
My opinion,😉
I have bought upc1237 from a number of eBay sources, all of them selling working parts. I test everyone in one of my PS designs. I have yet to find one bad part. Opinions are not necessarily facts or proof! Not to say that for other parts you maybe correct. Name one source selling fake upc1237?
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I don't know any who sell fake upc1237 because I haven't bought any, but I have bought many other fake parts.As for the upc1237 available at eBay i'm very disappointed from all those who write.... manufacture unbranded.
I can't see any you write..manufacture Unisonic.
Easy my friend,I haven't something against you☮️
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Nothing personal but if we find a genuine bogus supplier it would be nice to let everyone know who/what, instead of thinking everything on eBay is bogus.
I was sceptical too before I committed to using the uPC1237HA part in a new design. I even sourced some original OEM parts that I assume are mfg by Renesas (they merged with NEC Electronics in 2010) so I have some to compare against.
There is no mfg identification on the Renesas parts either, although you can tell its another package molding/stamping variation, vs the unbranded UTC parts I've been using.
☮️
I was sceptical too before I committed to using the uPC1237HA part in a new design. I even sourced some original OEM parts that I assume are mfg by Renesas (they merged with NEC Electronics in 2010) so I have some to compare against.
There is no mfg identification on the Renesas parts either, although you can tell its another package molding/stamping variation, vs the unbranded UTC parts I've been using.
☮️
""About this item
Condition
New
Time left
11h 11m
Quantity
85 sold
50 available
Item Number
321933495196
Brand
Unbranded/Generic""
I don't mean what is on the chip written but what seller say.
I see also two different package still out there.
That's why I'm sceptical.
If someone can post a clear image of a Unisonic(UTC) 1237 we would have something to compare.
Condition
New
Time left
11h 11m
Quantity
85 sold
50 available
Item Number
321933495196
Brand
Unbranded/Generic""
I don't mean what is on the chip written but what seller say.
I see also two different package still out there.
That's why I'm sceptical.
If someone can post a clear image of a Unisonic(UTC) 1237 we would have something to compare.
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Unisonic is a pretty bona-fide semi supplier. There are lots of successful small niche semi companies like this in Taiwan (I lived there for 3.5 yrs) and they are pretty capable and technically good. The problem is they mostly sell through 2nd tier distributors in Asia and not any of the mainstream ones we are familiar with here in the West.
I also have an aversion to buying silicon off the bay, not worth the risk, and didn't see any reputable site selling 1 off examples. Maybe @Bonsai consider buying 1000 (or whatever) from a reliable source and include them with the PCB's. I'm happy to try the boards (4 of?) since the relay variant takes up a bit of space and I have questions about the relay contact material being on the cheap side, yeah, made in China...
HI Thimios,
thanks for the share, could you share the model # in which this was replaced by NAD
wanted to see the service manual
Crickelwood Electronics in London (UK) sell the genuine UPC1237 here https://www.cricklewoodelectronics.com/UPC1237HA.html
The price is listed as £5.
(I did try to order 50 UPC1237 but had no luck. Looks like Unisonics want BIG orders and a few of the people that claimed to have volume them did not when I asked for an RFQ)
The price is listed as £5.
(I did try to order 50 UPC1237 but had no luck. Looks like Unisonics want BIG orders and a few of the people that claimed to have volume them did not when I asked for an RFQ)
