Help identifying old component - Page 1
Forum section: electronics / beginners

author: random_person
author_rank: Newbie
timestamp: January 24, 2021, 12:21:28 am
content: Rummaging through an old box of misc components, I found a epoxy? ceramic? 16-pin DIP package, marked with "IAM E3318". Googling around I found nothing of note, exceptthis link to the computer history museumsaying that it is a microprocessor by Intel (the one I have is exactly like the one in the picture). Aside from that I can't get any other info, let a lone a datasheet.I have no idea how I got hold of this, so no idea where it came from. All I know is that it is rather old (it was in a box I hadn't looked into since, who knows, the mid 90's?) I didn't buy this, so I most likely recovered it from some device/appliance.Any info would be welcome!

author: retiredfeline
author_rank: Frequent Contributor
timestamp: January 24, 2021, 12:26:49 am
content: Resistor network? 3318 = 330 ohms, 8 of?

author: random_person
author_rank: Newbie
timestamp: January 24, 2021, 12:34:25 am
content: Holy, I think you are right! I measured opposing pins with an ohmmeter and they measure 328 ohm consistentlyThanks!

author: amyk
author_rank: Super Contributor
timestamp: January 24, 2021, 03:43:52 am
content: You might want to tell the computer history museum about that... a more general museum I think would have less of an idea, but that is just disappointing.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: January 24, 2021, 04:45:21 am
content: There are a few configurations of these. Eight isolated resistors, eight in series and eight with a common ground. A few more minutes with the ohm meter and you should have it nailed. The series connection is least likely. Often the common ground types end up in a 9 pin SIP but some applications liked the DIP configuration. Maybe limitations of their pick and place.

author: retiredfeline
author_rank: Frequent Contributor
timestamp: January 24, 2021, 05:09:30 am
content: Quote from: amyk on January 24, 2021, 03:43:52 amMaybe they couldn't resist putting it on display.

author: random_person
author_rank: Newbie
timestamp: January 24, 2021, 10:40:58 am
content: Tested and everything points out to 8 independent resistors through opposing pins (1-16, 2-15, etc.)Thanks!

author: random_person
author_rank: Newbie
timestamp: January 24, 2021, 10:50:23 am
content: Quote from: amyk on January 24, 2021, 03:43:52 amSent a message through the contact form. Let's see what happens.

author: random_person
author_rank: Newbie
timestamp: January 27, 2021, 02:28:52 pm
content: Quote from: random_person on January 24, 2021, 10:50:23 amWhat do you know, they replied back and said that would look into it. The person on the other side agrees that this is not a uP. Now with more info, I think the company that produces them is IAM electronics (Japan)http://www.iam-ele.co.jp/,as they especialize in Hybrid ICs and resistor networks. In the product sections they have stuff that pretty much looks like this chip (http://www.iam-ele.co.jp/products/)Thanks!Case closed.

author: gnuarm
author_rank: Super Contributor
timestamp: January 27, 2021, 07:24:39 pm
content: Quote from: random_person on January 27, 2021, 02:28:52 pmJust as a note, it was a bad idea to measure the resistance of a part you thought might be a very old semiconductor. In the early days the industry was not so aware of static precautions and devices were seldom designed for the normal static charges developed during handling. I guess I should not assume you didn't take static precautions, but even the voltage of an ohmmeter can damage more sensitive devices. They need to be checked with special devices that only apply a smaller voltage to the circuit.I have some Intel 8008 chips and never even take them out of the PAPER bag they are in. Someday I need to dig them out of the archives and give them to a museum. BTW, I believe these early processors were ALL made in ceramic packages so your epoxy coated package had no chance of being an Intel processor. That said, I'm not so sure of the 4 bit processors.

author: retiredfeline
author_rank: Frequent Contributor
timestamp: January 28, 2021, 12:09:24 am
content: Quote from: random_person on January 27, 2021, 02:28:52 pmMaybe some newbie curator thought it might stand for Intel Advanced Microprocessors? ¯\_(ツ)_/¯