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<cullennew...@gmail.com> 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]yamazak...@gmail.com>
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?
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