Re: UDN6118A vs UDN6118P

Usually an "N" or "P" suffix means the package is a plastic DIP. For
Allegro (used to be Sprague) parts the "A" means plastic DIP---for
anyone else would have meant improved part.

barry2@shilmover.com wrote:
> All,
>
> I found some old Williams display boards with UDN6118P chips on them. I could not find a pdf for them.
>
> what are the differences between the A and P chips? Are they interchangeable?
>
> Barry
>
> ----------------
>
> I meant PDF page 131
>
> Matt
>
> On Tue, 26 May 2009 22:18:04 -0700, Matt Rossiter <matt@rossiters.com>
> wrote:
>
>> Some of the Fluke 9010a's (mine for example) might be different than
>>
> these
>
>> schematics, but you can look here on pdf page 137.
>>
>>
> http://arcarc.xmission.com/Test%20Equipment/Fluke/9010A%20Base/9010A%20Service%2
> 0Manual.pdf
>
>> You should know how to convert Hex to Binary.
>> HEX-08 -> D7=0 D6=0 D5=0 D4=0 D3=1 D2=0 D1=0 D0=0
>>
>> If it's reporting BTS 8 is failing - then check the 4116 ram chip
>> responsible for D3 - which is at locate U12.
>>
>> If BTS 12 are failing, it means D3 and D2 are stuck. So check U11 and
>>
> U12
>
>> or their buffers.
>>
>> Matt
>>
>> On Tue, 26 May 2009 21:41:10 -0400, barry2@shilmover.com wrote:
>>
>>> Hooked up the 2nd 9010A. It returns:
>>>
>>> R/W ERR @ C000 BTS 12 - LOOP?
>>>
>>> Barry
>>>
>>> ----------------------
>>>
>>> I been having trouble posting to the group... trying again.
>>>
>>> I have 2 non-working 9010A units. On both they beep once, LEDs flash,
>>>
>> then
>>
>>> nothing.
>>>
>>> Hooked up a working 9010A that I borrowed (thanks David). Bus tests
>>>
>> fine.
>>
>>> RAM
>>> returns the following:
>>>
>>> R/W ERR @ C000 BTS 08 - LOOP?
>>>
>>> Manual states:
>>> If a RAM failure occurs, carefully examine the diagnostic message. The
>>>
>> RAM
>>
>>> Test is usually sufficient for deducing the failed component directly.
>>>
>>> It then does not explain how to read the message. :-) I am new to
>>>
> this,
>
>>> so be
>>> kind if its a stupid question.
>>>
>>> I deduced that there is a Read/Write error at C000. How do I "deduce"
>>>
>> the
>>
>>> failed component?
>>>
>>> Barry
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Received on Sun May 31 20:51:05 2009