SOIC-8 package size error

Question

I designed a PCB using both NE5532 and OP177 opamps. In principle both opamps are in SOIC-8 packages. However when I received the opamps, I found the NE5532 are much larger than the footprint they were designed to have on the PCB (using the KiCad SOIC-8 3.9x4.9mm footprint).

If I measure the width of the NE5532 it appears to be wider than 5mm, while the datasheet says it shouldn't be wider than 4mm.

What has gone wrong here? Have I made a bad assumption somewhere? Or is this a faulty package?

The NE5532 I ordered is this, and the OP177 is this, both from Mouser.

Here's the OP177 (top) and NE5532 (bottom), both in "SOIC-8" packages:

score 6 · Accepted Answer · answered Dec 04 '21 at 14:22

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This is the NE5532APSR dimensional drawing from its data sheet: -

This is the OP177GSZ dimensional drawing from its data sheet: -

Can you see the difference now?

answered Dec 04 '21 at 14:22

Andy aka

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Yep, someone didn't read the suffix properly. Thanks! – Simon Coop Dec 04 '21 at 14:23
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We've all done it at some time or other if it's any consolation @SimonCoop – Andy aka Dec 04 '21 at 14:27

SOIC-8 package size error

1 Answers1