Is this going to be okay?

Lhoraxe · June 17, 2021, 04:57:56 PM

Ordered smd rc4558 from tayda by accident... Mounted it to a breakout board. Will they work this way or will it screw with a thing of some sort? Lol. Also, I'm reading correctly that these are bipolar right? So I can mount them upside down, inverted, flipped around, whatever it doesn't matter right? Also... Maybe I'm dumb, but I'm not clear on where to go here to simply show off the things I made.

Thank you all!

Lhoraxe · June 17, 2021, 05:01:09 PM

Quote from: Lhoraxe on June 17, 2021, 04:57:56 PM
Ordered smd rc4558 from tayda by accident... Mounted it to a breakout board. Will they work this way or will it screw with a thing of some sort? Lol. Also, I'm reading correctly that these are bipolar right? So I can mount them upside down, inverted, flipped around, whatever it doesn't matter right? Also... Maybe I'm dumb, but I'm not clear on where to go here to simply show off the things I made. Edit: hmmmm found the pictures forum, I'm guessing that's the place, lol.

Thank you all!

Lhoraxe · June 17, 2021, 05:03:06 PM

Oh man... I'm like my dad with siri on here, jeeze.

GGBB · June 17, 2021, 05:08:29 PM

Quote from: Lhoraxe on June 17, 2021, 04:57:56 PM
Ordered smd rc4558 from tayda by accident... Mounted it to a breakout board. Will they work this way or will it screw with a thing of some sort? Lol. Also, I'm reading correctly that these are bipolar right? So I can mount them upside down, inverted, flipped around, whatever it doesn't matter right? Also... Maybe I'm dumb, but I'm not clear on where to go here to simply show off the things I made.

Thank you all!

Should be fine, but no you can't mount them upside down or flipped what have you - the pinouts do not invert.

If you want to show off go to the Pictures! thread: https://www.diystompboxes.com/smfforum/index.php?topic=36392.msg1221138#new

Lhoraxe · June 17, 2021, 06:00:47 PM

Quote from: GGBB on June 17, 2021, 05:08:29 PM

Should be fine, but no you can't mount them upside down or flipped what have you - the pinouts do not invert.

If you want to show off go to the Pictures! thread: https://www.diystompboxes.com/smfforum/index.php?topic=36392.msg1221138#new
[/quote]

Okay so... I have it oriented where if you are looking at the component in a way where you can read the makings on it. Then I assume the top right pin is pin one and it connects to the square pad? I see no other marking to go by here.

idy · June 17, 2021, 06:21:14 PM

Both old fashioned DIP and the newer tiny SOIC have a small dent near one end of the chip. This is near pin 1 or at least on the same end as 1.

Usually any printing, when right-side up, will put pin 1 on the lower left and you count counter clockwise around the chip. abut we don't go by the printing, we go by the dent, or dimple.

Yes break-outs and other PCBs often have a square pad for pin 1. PCBs often have a little "bite" or semi-circle on that end, corresponding to the dimple in the chip.

If you look at a data sheet for your chips all this should be there. Sometimes a little shading on the picture of a SOIC, called "Pin 1 ID area."

On this link it is page 20.
https://www.ti.com/lit/ds/symlink/rc4558.pdf?ts=1623965621327&ref_url=https%253A%252F%252Fwww.google.com%252F

GGBB · June 17, 2021, 06:34:03 PM

Quote from: Lhoraxe on June 17, 2021, 06:00:47 PM
Okay so... I have it oriented where if you are looking at the component in a way where you can read the makings on it. Then I assume the top right pin is pin one and it connects to the square pad? I see no other marking to go by here.

What idy said about identifying pin 1 of the IC. Pin 1 will be marked somehow - no other pin will be marked. Square pad on the PCB will be pin 1.

ElectricDruid · June 18, 2021, 06:43:22 AM

Quote from: Lhoraxe on June 17, 2021, 06:00:47 PM
Okay so... I have it oriented where if you are looking at the component in a way where you can read the makings on it. Then I assume the top right pin is pin one and it connects to the square pad? I see no other marking to go by here.

There *will* be some other marking beyond the printing. But even if you *were* to assume (and assumptions are never safe!) the better assumption would be that pin one on the chip is bottom-left (like idy said), not top-right.

I've got a bag of SMD processors here and they're marked with a circular depression ("dimple" idy called it) next to pin 1.

DIY Bass · June 18, 2021, 07:08:44 AM

The other marking that you will see, even if there is no other (and which you can see in the datasheet linked to above) is that usually one top edge will be chamfered. In the datasheet you can see that the edge running down beside pins 1-4 has the chamfer

Lhoraxe · June 18, 2021, 09:35:42 AM

OK, cool, I totally mounted it wrong. I'm a dang genius... I thought I was so cool for pulling this smd thing off. Lol. Thak you so much folks!

News:

Is this going to be okay?