# Re: Volunteer for back end development - excellent info in this msg

Mathew sienko x7439 (msienko@galaxy.nsc.com)
Thu, 9 Dec 1999 11:14:46 -0800 (PST)

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>
> > I am one of the designers of the chip that is at the heart of the HP
> > 4200c and would like to mention a few things about it here. As mentioned,
> > this scanner does not use SCL. Instead, it uses its own, custom,
> > protocall defined by the chip it is built around, the LM9830. This is the
> > first Merlin chip from National Semiconductor. We used a custom interface
> > because SCL would have required more expensive parts. We just released
> > the LM9831, and will soon release the LM9832, which all both use an
> > interface very similar to the LM9830.
>
> Are these ASICs by any chance also used by the HP ScanJet 3300C and friends?
>
> David

The HP 4200 is the only scanner currently available that uses the LM9830. I
don't know what HP's plans are, but there should be some scanners based on
the LM9831 coming out soon from other sellers.

Matt

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