SMD part id - Page 1
Forum section: electronics / beginners

author: Agentfoot
author_rank: Regular Contributor
timestamp: November 07, 2024, 10:48:28 pm
content: What exactly is this part? Picture of a broken on then another I found that looks to be the same. Has 3V in the middle above pin1 mark a = on the left and = and o on the right.

author: Agentfoot
author_rank: Regular Contributor
timestamp: November 08, 2024, 12:07:41 am
content: Forgot to add its about 1.5mm by 2mm

author: Solder_Junkie
author_rank: Frequent Contributor
timestamp: November 08, 2024, 02:49:35 pm
content: Manufacturers use 2 or 3 character IDs on SMD transistors, Voltage regulators, etc. given the number of possibilities, you really need to refer to the circuit as 2 characters of ID are not sufficient to accurately determine the part, unless you are very lucky.This database lists over 30 possibilities:https://smd.yooneed.one/SJ

author: u666sa
author_rank: Frequent Contributor
timestamp: November 08, 2024, 04:22:50 pm
content: NE1102preliminarydatasheetRev0.0-Finish-1.pdf(570.68 kB - downloaded 192 times.)

author: tooki
author_rank: Super Contributor
timestamp: November 08, 2024, 04:30:54 pm
content: Quote from: u666sa on November 08, 2024, 04:22:50 pmThe markings described in that datasheet do not match the markings on the chip in the photo at all.

author: wraper
author_rank: Unknown
timestamp: November 08, 2024, 05:08:59 pm
content: ^pin count does not match either.

author: tooki
author_rank: Super Contributor
timestamp: November 08, 2024, 06:07:29 pm
content: I truly don’t understand why someone would bother to reply with an answer that is so clearly and obviously wrong. It’s not as though it’s some subtle difference.

author: Agentfoot
author_rank: Regular Contributor
timestamp: November 08, 2024, 06:31:08 pm
content: Then the new twist. I just realized my cheap microscope mirrored the picture. So the chip actually reads "VE".I know it had something to do button presses, since I have some buttons that no longer work.I suppose I could take some measurements on the good one to help try and id it.

author: wraper
author_rank: Unknown
timestamp: November 08, 2024, 06:39:23 pm
content: 74LVC1G08https://www.lcsc.com/product-detail/Logic-Gates_Nexperia-74LVC1G08GW-125_C12512.html

author: Agentfoot
author_rank: Regular Contributor
timestamp: November 08, 2024, 06:50:48 pm
content: That sure looks to be it. Im not sure if the markings on the left and right mean anything because they are different. I took some voltage measurements included on my drawing.

author: wraper
author_rank: Unknown
timestamp: November 08, 2024, 06:55:40 pm
content: Note that IC comes in several different packages that may look the same on the picture but dimensions are different.

author: Agentfoot
author_rank: Regular Contributor
timestamp: November 08, 2024, 07:10:42 pm
content: Ok thanks. It's going to take a miracle to actually get the part mounted. I don't work with stuff this small normally. But it's already broke so mind as well try.

author: tooki
author_rank: Super Contributor
timestamp: November 08, 2024, 08:42:50 pm
content: Those are easy to solder as long as you have a decent flux and a good pair of tweezers!Edit: and good light. Trying to solder little fiddly shit in bad light is horrible.