($50 bounty) Identify this mezzanine connector from 1996 - Page 1
Forum section: electronics / repair

author: badgerthing
author_rank: Contributor
timestamp: May 16, 2020, 10:45:41 am
content: Hello!I want to reproduce some hard-to-find RAM upgrade modules for the collectible Toshiba Libretto series mini-laptops.These laptops came with 32MB RAM soldered, and a place to add another 32MB module. However, you can slightly modify a 64MB module from a later model laptop, giving 96MB total.Both these modules are too hard to find. I want one for my Libretto 100CT, and a friend wants a few.This will be an open-source design.There is one roadblock stopping me continuing with the project: I need to identify the mezzanine connector used to connect the RAM module to the motherboard.I cannot use a different one. I need to use the same one, or one that will fit. I can't change the mating connector on the motherboard.140-pin0.5mm pitchSits roughly 1.8mm off the PCBCreates about 2.5mm distance between the two PCBsPhotos of the connector are attached, with a few measurements.The 32MB module in my Libretto has the Transcend logo on it. I've seen pictures of other brand ones with the exact same PCB tracks.I've checked Digikey, Mouser, Element14, RS Components.It is most likely an obsolete connector, which I'll probably need to go to Alibaba for.I'll give 50 bucks to anyone who successfully identifies it.Cheers from NZ!JD

author: KE5FX
author_rank: Super Contributor
timestamp: May 16, 2020, 11:14:44 am
content: Safe to say Samtec sells something such as that.Surf around on samtec.com.LSH/LTH, maybe?The exact part may no longer be available but something compatible with it likely still exists. BSH/BTH may be another candidate. Or ERF5?Hirose may be an even better bet, something likethis?Or one ofthese? Thisobsolete Molex partlooks pretty close. Finding the correct gender is a good exercise for somebody else...

author: coromonadalix
author_rank: Super Contributor
timestamp: May 16, 2020, 03:49:42 pm
content: some linkshttps://www.xodustech.com/guides/libretto-100ct-96mb-ram-upgradehttps://avics.home.xs4all.nl/Lib96MB.htmlsome part info ?https://www.memoryx.com/nw2059u.htmlhttps://www.memoryx.com/ktt3010321.htmlBrand: TranscendProduct name: 32MB Toshiba Libretto 100CTProduct code : TS32MTL10064MB Toshiba Portege 3010 RAM with model number PA2067U

author: badgerthing
author_rank: Contributor
timestamp: May 16, 2020, 03:59:43 pm
content: Quote from: coromonadalix on May 16, 2020, 03:49:42 pmThanksI've found these links before, but they definitely won't have a detail as specific as the model of mezzanine connector used on it. That information isn't useful to the end user at all.

author: DC1MC
author_rank: Super Contributor
timestamp: May 16, 2020, 05:29:42 pm
content: The module option:https://www.memoryten.com/p/003952.htmlhttps://www.xodustech.com/guides/libretto-100ct-96mb-ram-upgradeDC1MC

author: badgerthing
author_rank: Contributor
timestamp: May 16, 2020, 05:44:27 pm
content: Quote from: DC1MC on May 16, 2020, 05:29:42 pmThanks, but this doesn't help towards identifying the connector

author: Cloud
author_rank: Regular Contributor
timestamp: May 17, 2020, 12:08:47 pm
content: I had some similar from hirose

author: Haenk
author_rank: Super Contributor
timestamp: May 17, 2020, 12:43:19 pm
content: I suggest contacting MemoryTen, they might have these connectors as parts, mybe they even have some PCBs left. (They purchased lots of stuff "back in the day" for future use…)

author: badgerthing
author_rank: Contributor
timestamp: May 17, 2020, 12:54:01 pm
content: Quote from: Haenk on May 17, 2020, 12:43:19 pmThanks!I have emailed them.They have a similar module on their site which has the correct connector:https://www.memoryten.com/p/018804.htmlHowever, this is Transcend branded, which means they probably aren't making these memory upgrades, and so won't know what the connector model is.Maybe I'll email Transcend...

author: asis
author_rank: Frequent Contributor
timestamp: May 17, 2020, 01:21:36 pm
content: https://datasheetspdf.com/pdf-file/776888/HRS/FX11LA-140P-SV/1

author: badgerthing
author_rank: Contributor
timestamp: May 17, 2020, 01:24:12 pm
content: Quote from: asis on May 17, 2020, 01:21:36 pmIf only! This is the one that comes up first in my search at every distributor.It doesn't look like it will fit when I look closely, but maybe it will, or with a small modification.However, the datasheet does not have all the measurements of the internal plastic parts, because they assume you'll purchase these with the matching header.I may add one to my Mouser cart to test if I come up empty elsewhere.