DIL Socket for Surface Mount?

Hi, Del,

I've been looking for it the other way round - SOT23 to 8-pin DIL (or similar). It's for Brian the Teacher's LED lamp project. I came across the same sort of problem - you end up paying a damn sight more for the adapter than for the chip!. I haven't spotted what you're looking for (but then I haven't been looking for it!). I'll keep my eyes open.

Cheers, John

Might work for Brian. Huge delivery cost but £2 each overall for a reasonably sized class. Worth knowing about.

http://uk.farnell.com/4122288/semiconductor-accessories-prototyping-antistatic/product.us0?sku=CAPITAL-ADVANCED-33205.

Or Digikey: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=33205CA-ND

Hey Del-

Does this fit your need?

Del,

I think you are going to have a hard time getting something for less than £1. Mill-Max has some nice sockets (www.mill-max.com), but they don't give pricing. From past experience, they are not cheap, but the quality is good. I think if your quantities are high enough, find a souce in China, I think that's the only way you'll get anywhere near £0.1

Good luck!

Tom

Please get in touch with Champion Electronics in India. www.champelec.com for reasinable cost machined pin Surface Mount Sockets.

Nalin

Champion does not seem to make SMD sockets.

Del,

I guess you tried the obvious Mill-Max, Aries. 1£ seem about right for volume.

Did you try preci-dip.com? Swiss made may be quite cheap or quite expensive.

Tyco: 5-1814640-1 has stamped, not machined contacts.

The picture is not representative of the product, look at the drawing:

Then again, the drawing looks like it's machined.

Stamped + Formed

One-piece contact.

Screw Machine

%$#@&&*@ , is this really a good way to save money for Tyco?

Two possible ways:-

You can buy turned pin sockets in strips, I have used them for years, you just break off the connecting piece of metal once they are soldered in. Very cheap. Very strong.

1) Get them mounted automatically (but this seems to take away a bit of work for the pupils.

or

2) Let the kids clean the holes and solder them in themselves on the otherwise finished PCB.....

I actually feel that you are in the wrong thread, I answered the question with two possible ways to achieve a quality, but cheap DIL socket, what are you on about?

Pupils? Kids?

Aren't we all kids at heart?The rest of my post was very grown up (for me!)

Hi Del,

Why do you think about using sockets ?

From several "reanimated" projects I know that manufacturers of PCBs have machines to bend and cut DIL-legs of ICs for little money. You need only this tool to pull the ICs through and get a DIL-shaped gullwing SMD-part with bend legs showing to the inside or the outside, as you want. The only thing is that you need a little more space (if showing outside) and a custom landing pattern but I think thats not the problem at high volume quantities. Another advantage is that you have no unwanted resistance in your socket contacts.

When you look at avagotechs HCLP-7860 (thats former hp, an isolating amplifier) you see an example and get an idea how they "pimp" their old circuits - in this case to get a good creeping-distance for HV-applications.

Regards and good luck
Uwe

Uweka, I think that the chips need to be socketed because they need to be removed for re-programming when someone does an upgrade (soft or hard).

But, this technique might work to convert cheap through hole sockets to SM sockets.

We have several software variants and we program the chips inhouse, thats why we use a socket. Damn customers eh, they all want something different

It looks like we'll probably end up going over to the PLCC package....

Del

Or have an in-circuit programming design.

Hi Del, the device is 0.6"? That's an odd pitch. Is it a J-lead type?

It's a 'standard' DIL chip (the fat sort ... 0.6" the thiner ones ..like standard TTL are 0.3" pitch....).

The more I look, the more convinced I am we'll go to PLCC it will slow up the transition as we loads of chips on forward order (to get a good price), it will also mean we have to by some in each package.....

It's a Zilog z86733 if anyone is interested....

Bill,

.6" is standard width for 24-40 pin DIP packages, least it is here in the states.

Tom

Sorry TD, hadn't seen it! See, we all learn something.

Thanks for your comment!

Hey Del!!

I am wondering if it would be feasible to take a 28 pin socket and bend the leads out at 90 degrees for SMT soldering. I would take a chunk of aluminum and drill 14 in line holes (.1 inch spaceing, diameter just over socket pin size). Put one side of socket in, bend, put other side of socket in and bend. I would use stamped pins rather than tooled because they would be easier to bend. It is a crude fix, but it might work in a pinch.

Sincerely

Bill

Surely its possible to drill holes for the pins, as spreading would take up a lot of extra room? On my favorite CAD package for PCB design (Eagle), I could mix SMD and DIL with no problems on the same PCB if I wished many years ago.

Yes I had wondered this...
Well I'd wondered why the ordinary cheap dil sockets (stamped pins) aren't available as SM. My guess is the solder would maybe 'wick' up during the IR soldering process and solder the two leaves of each connector together?
This is going to be done fully automated so I think the component needs to be spot on.

We are trying to save on the hand soldering time...our 'ladies' will still fit a transformer and a couple of connectors, but we don't want 'em to be soldering 28pins per board.

Del

Del

Del, they are!

Look at post #16

From the Tyco site:

Product Type Features:

• Product Type = DIP Socket
• Number of Positions = 28
• Profile = Standard
• Frame Style = Open
• Leg Style = Straight
• Color = Black
• Sleeve Material = Brass
• Sleeve Finish = Tin
• Qty./Tube = 15

Electrical Characteristics:

• Insulation Resistance (MΩ) = 10,000
• Contact Resistance (mΩ) = 10

Termination Related Features:

• Termination (Solder) Post Length (mm [in]) = 2.84 [0.112]

Body Related Features:

• Row-to-Row Spacing (mm [in]) = 15.24 [0.600]
• Mount Style = Vertical
• Centerline (mm [in]) = 2.54 [0.100]

Contact Related Features:

• Contact Mount = Surface Mount
• Contact Material = Beryllium Copper
• Contact Mating Area Plating = Gold Flash
• Contact Style = Stamped + Formed
• Mating Contact Type = Dual Leaf

Cheers.. I've had a look...

The text, drawing and picture are all different....

I shall get purchasing to chase 'em for a price and sample.

thanks

Del

Del

I did a little research. If you have not done so, try Tyco Electronics

phone 44-8706-080-208

I put an E-mail request for their recommendations for part numbers. When I get a reply from them I will forward it to you... and I did specify Rohs compliant.

I have found some of the other responses confusing in that the pictures look like thru-hole sockets. Just so we are comparing apples to apples, the sockets you need are surface mounted to the PC board. The socket accepts standard thru-hole 28 pin DIL integrated circuits. Right?

Lets see what happens.

Bill

the sockets you need are surface mounted to the PC board. The socket accepts standard thru-hole 28 pin DIL integrated circuits.

Correct.

The lead from Gigaconcept looks good....the problem was the illustration, drawing and written description all dissagree...

A picture is worth a thousand words, but only if it's the right picture...!
How many sales do some of these companies lose 'cos their site is NFG?

Thanks for the help everyone...
I'll let you know how it all turrns out!

Del

...and maybe a picture made not to lose/show any company secrets?

And provide a drawing for a machined socket?