Re: gEDA-user: SC70-6, which is pin 1?

[yamazakir2 <yamazakir2@xxxxxxxxx>]

Just fired up the board, the bottom left was in fact pin 1.

On Fri, Apr 1, 2011 at 10:12 AM, Joe Chisolm - Gmail
<jchisolm6@xxxxxxxxx> wrote:
>  If the lot marking is oriented so you can read it pin 1 should be lower
> left but verify from the tape reel. Look at page 15 of
>
> http://focus.ti.com/lit/an/szza021c/szza021c.pdf
>
> The basic rules are (from page 15):
>
> Component orientation in the carrier-tape pocket is governed by EIA-783,
> which states that the
> following orientation rules shall be followed, sequentially, until no other
> variation is possible (see
> Figure 11):
> 1. The largest axis of the component outline shall be perpendicular to the
> tape length.
> 2. The edge of the package containing termination 1 shall be oriented toward
> the round
> sprocket holes.
> 3. For the components where rule 1 and rule 2 do not establish a unique
> orientation,
> termination 1 shall be in quadrant 1 (see Figure 12).
> Typical TI component orientation is shown in Figure 13.
>
> On 04/01/2011 11:35 AM, yamazakir2 wrote:
>>
>> The datasheet is pretty ambiguous, take a look and let me know what
>> you guys think:
>>
>> http://focus.ti.com/lit/ds/symlink/sn74lvc1g3157.pdf
>>
>> On Fri, Apr 1, 2011 at 5:21 AM, Cullen Newsom<cullennewsom@xxxxxxxxx>
>>  wrote:
>>>
>>>   Have you got a part number for it? What's inside? You could use a DMM
>>>   to confirm, if you consider its internals. Your guess of bottom left
>>>   seems reasonable.
>>>   -CN
>>>
>>>   On Fri, Apr 1, 2011 at 4:13 AM, yamazakir2<[1]yamazakir2@xxxxxxxxx>
>>>   wrote:
>>>
>>>     I'm guessing based off that mark the bottom left pin is pin 1. The
>>>     datasheet isn't clear. Does anybody know for sure if thats pin 1?
>>>     _______________________________________________
>>>     geda-user mailing list
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>>>
>>> References
>>>
>>>   1. mailto:yamazakir2@xxxxxxxxx
>>>   2. mailto:geda-user@xxxxxxxxxxxxxx
>>>   3. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
>>>
>>>
>>>
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>>>
>>
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>
> --
> Joe Chisolm
> Marble Falls, Tx.
> 830-265-8018
>
>
>
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>


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