Is there such a thing as a through-hole SOJ socket?

_________________
Bill

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?

at one time, I searched for such an animal and came up empty. I've never seen one.

_________________
x86?  We ain't got no x86.  We don't NEED no stinking x86!

Specifically, what chip do you wish to socket? Is SOJ the correct term to describe it? I'm looking at a Digikey search but SOJ isn't in the "Type" drop-down. Yet I'm sure I've seen sockets that match the same style which matches Garth's suggestion (assuming his suggestion is appropriate).

J.

_________________
In 1988 my 65C02 got six new registers and 44 new full-speed instructions!
https://laughtonelectronics.com/Arcana/ ... mmary.html

SOJ refers to a dual-inline package style with "gull wing" pins that wrap around underneath the package body. It's sort of like a a DIP package formed from opposite sides of a PLCC package.


Here's an SOJ-36 soldered in place

_________________
x86?  We ain't got no x86.  We don't NEED no stinking x86!

Thanks, yeah... I've seen chips like that -- and sockets to match, as noted. But I'm asking, is SOJ the correct term to describe it? I'm hoping the chip's datasheet will use vocabulary that matches some of DK's offerings.

_________________
In 1988 my 65C02 got six new registers and 44 new full-speed instructions!
https://laughtonelectronics.com/Arcana/ ... mmary.html

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?

Funny, I was going to post that same data sheet last night, but sleepiness (an old man thing) caught up with me.

_________________
x86?  We ain't got no x86.  We don't NEED no stinking x86!

Alright, I was able to find a specimen in my junk box. And, after some none too gentle coaxing with a heat gun, I got a look at the underside, too.

This style of socket is surface-mount, of course, but I suppose it could (with difficulty) be attached to the adapter Garth posted. The socket apparently has the same footprint as the naked chip.

I don't see anything that identifies the socket manufacturer, unfortunately. But they might also market a through-hole version. It would be the exact same product, except the little tabs would project rather than lying flat. No surprise, however, if Digikey doesn't carry either version.

I removed both samples from the board (a defunct PCI VGA card), and if they're of any use you're welcome to them, Bill. It'd be easy enough to slip them in the mail.

cheers
Jeff

_________________
In 1988 my 65C02 got six new registers and 44 new full-speed instructions!
https://laughtonelectronics.com/Arcana/ ... mmary.html

Bill has had bad luck with parts going through the mail. They have serious wanderlust and end up in places such as Poland and Switzerland.

_________________
x86?  We ain't got no x86.  We don't NEED no stinking x86!

Thanks for all the info guys, and sorry for the late response. Been doing some upgrades to a short term rental property whilst in shut down mode.

So it looks like I'm a bit pout of luck on this. Maybe something like Garth's module would be a better approach.


I had been thinking about a 65C816 design and wanted to use 512KB memory chips. I had in mind the old Motorola MCM6946 (which I can still get NOS) or the CY7C1049CV33, but the ISSI chip Garth mentions would work too. They would be drop in replacements for each other.

Thanks for the offer Jeff, I really appreciate it but I'd have no way to solder those sockets on. Seems bit weird to put an SMD device in a SMD socket, but maybe not.

Thanks Garth. Unfortunately not available in the 36-pin variety.

True, this.

_________________
Bill

I'll reiterate that whoever made my sockets very likely also offers a through-hole version. Seems it'd be a trivial variation, manufacturing-wise, involving nothing more than the omission or inclusion of a 90 degree bend.

What motivated you to want a socket in the first place? It's not difficult to solder a chip like that directly to an etched PCB. Were you hoping the socket would allow the RAM to later be reused in a different project? Or do you not plan on using an etched board?

In a protoboard context I found it easy enough to do a zig-zag pattern, thus adapting such chips to a .1" grid. (See some of the photos in this post. I also piggybacked the chips, but of course that's optional).

_________________
In 1988 my 65C02 got six new registers and 44 new full-speed instructions!
https://laughtonelectronics.com/Arcana/ ... mmary.html

It may be an old habit from the days when chips were very expensive and we have low confidence in our soldering skills.

In my case it's that I don't have confidence in my PCB design skills. About 60% of the time my first run has some error of some kind. I hate throwing away good parts with bad boards, so I try to minimize that as much as I can.

(I am getting better though - it used to be 100%)

_________________
Bill

_________________
http://WilsonMinesCo.com/ lots of 6502 resources
The "second front page" is http://wilsonminesco.com/links.html .
What's an additional VIA among friends, anyhow?