[Coco] OT: 63B09

Rogelio Perea os9dude at gmail.com
Thu Oct 20 11:31:43 EDT 2011

On Thu, Oct 20, 2011 at 10:04 AM, Louis Ciotti wrote:

Off topic, but since the CoCo uses 6809s, figured someone on here might know
> about this.
> I have a radio controller from circa late 80s that uses a 63B09 that I
> think
> may be bad.  What can I use in its place and is there a source?
> The problem I am seeing is RN6(Pins 24-31) has some "noise" on the line and
> the waveform is not exactly square like the rest of the data lines when
> observed with an oscilloscope.

Safest bet is to replace it with another 6309, you can still get those from

-- RP

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