Hamad bin Turki Salami wrote:
I have a defective music device. It's a MOTU MIDI Timepiece AV USB midi
interface. The problem is that the USB is not working.
...
MOTU doesn't sell replacement parts, so if I want to replace this IC
I need to get it from a third party supplier. Now, I don't know a thing
about IC's, so I'm lost here. The IC is marked:
CG5273DM 64013PC
IND9940
516070

Google comes up with lots of hits on the first code, CG5273DM and no
useful hits on the others, so I'm assuming that first code is what's
significant.

Now, a bunch of electronic component suppliers carry IC's that have
that designation of CG5273DM. They all have the right number of pins,
but vary in terms of the dimensions of the chip (which is listed in
some cases). The chips are described in some places as a DIP-28L
audio echo processor. That doesn't sound to me like it'd be used in a
MIDI interface, but what do I know?

On some of the Google hits, this chip seems to be associated with
Cypress, and Cypress makes generic USB interface chips, so this seems
to make sense. However, the Cypress website doesn't know anything
about this model. I don't know if this is maybe some Chinese clone,
or whatever. Try asking Cypress.

1. Is there any chance in hell that if I buy one of these chips from
a third party it's actually going to be the right one and make my
unit work?

Yes. AFAIK these controllers get their firmware from an EEPROM (there
should be one nearby).


HTH
Clemens