Does anyone have an HP Optoelectronics databook
from around 1995 which would have a datasheet for
the HP# 1990-0652 LED array? If you have
a datasheet, did these units have internal bias
resistors?

Thanks for any help that you may offer.
Jim

On May 27, 4:55 pm, Jim Flanagan <jf...@tampaREMOVEbay.rr.com> wrote:
> Does anyone have an HP Optoelectronics databook
> from around 1995 which would have a datasheet for
> the HP# 1990-0652 LED array? If you have
> a datasheet, did these units have internal bias
> resistors?
>
> Thanks for any help that you may offer.
> Jim

That's not an HP external number; don't expect to find it in an HP
Optoelectronics data book. Look up HLMP-6620 on the Avago website.

>Does anyone have an HP Optoelectronics databook
>from around 1995 which would have a datasheet for
>the HP# 1990-0652 LED array? If you have
>a datasheet, did these units have internal bias
>resistors?

My impression (from past reading, and from looking at the HP 1988-1989
Optoelectronics Designer's Catalog) is that HP parts with two pairs of
four digits, are HP internal part numbers, for HP-specified components
used within HP products (a laser-printer in your case, I'd guess).
These parts may or may not be made by HP, and it's not easy to find
out what the original manufacturer's part number was, or whether there
were any specific HP part-selection criteria (e.g. luminiosity)
associated with them.

The HP-manufactured parts sold to customers typically had a four-alpha
first group (e.g. HLMP or HDSP ) and a four-digit second group.

Unfortunately I don't see any 1990- prefix parts in the 1988/1989
catalog I have here... the only numeric-prefix codes are all 5082-
series.

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