They are ‘rectangular’ but not ‘square’. As I mentioned, “You want the type that has a rectangular but not square profile with the thin side less than 0.5mm. These work well in normal leaf sockets and seem to work well in machine pin sockets as well.”
These leads on these headers measure 0.014”x0.025” (0.36mm x 0.64mm). I have produced 100+ chip replacements with these and they work well. Jeff Birt From: M100 <[email protected]> On Behalf Of Stephen Adolph Sent: Friday, February 26, 2021 12:39 PM To: [email protected] Subject: Re: [M100] low profile pcb pins thanks for the suggestion Jeff. Those look like square pins right? I don't think those will engage nicely with the typical DIL socket you would see used with an IC though. Am I wrong? Ive tried to stuff those pins into sockets before and... it doesn't seem right to do that. Steve On Fri, Feb 26, 2021 at 1:37 PM Jeffrey Birt <[email protected] <mailto:[email protected]> > wrote: For the MOS8701/HB I produce I use the long tail stackable headers commonly used for Arduinos. You want the type that has a rectangular but not square profile with the thin side less than 0.5mm. These work well in normal leaf sockets and seem to work well in machine pin sockets as well. The trick is you need a fixture to solder them. For example, if you set your PCB down on a breadboard and push the headers through you can top solder and trim the excess away. The plastic part of the header is only serving as a carrier to hold the pins in place in this case. Jeff Birt From: M100 <[email protected] <mailto:[email protected]> > On Behalf Of B4 Me100 Sent: Friday, February 26, 2021 10:27 AM To: [email protected] <mailto:[email protected]> Subject: Re: [M100] low profile pcb pins I have used the following two strips with the M100 SysBus socket for quite a few projects - not sure it is the same format as the NEC socket. The strips are very low profile which means the modules easily clear the cover, even with tall components on the top side. But they are expensive which is OK for one or two modules but perhaps not for mass production. Samtec TS-120-T-A 20 pins = $2.83 https://www.digikey.com/en/products/detail/TS-120-T-A/SAM1112-20-ND/1105474?itemSeq=356013488 Mill-Max Manufacturing Corp. 335-40-120-00-160000 20pins = $6.83 https://www.digikey.com/en/products/detail/335-40-120-00-160000/ED5932-20-ND/4455921?itemSeq=356013724
