« previous next »
Pages: [1]   Go Down

Author Topic: Help Dating a Chip  (Read 934 times)

0 Members and 1 Guest are viewing this topic.

Offline NY2KWTopic starter

  • Regular Contributor
  • *
  • Posts: 151
  • Country: us
Help Dating a Chip
« on: January 19, 2023, 09:56:31 pm »
I have searched the datasheets but none mention how dating is stamped on these ZeroPower SRAMs.

Is the manufacture date 1999 for both of these examples, or is one 2014 and the other " alt="" class="bbc_img" />2021?

Its an important distinction for estimating remaining litium battery life

Thank you in advance.

Jerry NY2KW
Logged
 

Offline NY2KWTopic starter

  • Regular Contributor
  • *
  • Posts: 151
  • Country: us
Re: Help Dating a Chip
« Reply #1 on: January 19, 2023, 09:58:09 pm »
or is it 2005 and 2012?
Logged
 

Offline aargee

  • Frequent Contributor
  • **
  • Posts: 877
  • Country: au
Re: Help Dating a Chip
« Reply #2 on: January 19, 2023, 10:00:13 pm »
Tinder? Sorry, had to...

But - I'd go for 6th week of 1999.
Logged
Not easy, not hard, just need to be incentivised.
 
The following users thanked this post: Psi

Offline inse

  • Frequent Contributor
  • **
  • Posts: 673
  • Country: de
Re: Help Dating a Chip
« Reply #3 on: January 19, 2023, 10:08:18 pm »
But they look different, thats why I also would guess for 05 and 12
Logged
 

Online Benta

  • Super Contributor
  • ***
  • Posts: 6031
  • Country: de
Re: Help Dating a Chip
« Reply #4 on: January 19, 2023, 10:39:58 pm »
Certainly not the 2xxx years. The EU battery directive forbade embedded cells before that, allowing only removable cells, and ST stopped production at that time IIRC.
9906 could be right.
Logged
 

Offline NY2KWTopic starter

  • Regular Contributor
  • *
  • Posts: 151
  • Country: us
Re: Help Dating a Chip
« Reply #5 on: January 19, 2023, 11:05:24 pm »
I don't think they are forbidden.  St makes a slighlty different version with an embedded lithium cell as of Sep 2020.  See ATTACHED
Logged
 

Offline SiliconWizard

  • Super Contributor
  • ***
  • Posts: 14907
  • Country: fr
Re: Help Dating a Chip
« Reply #6 on: January 19, 2023, 11:28:29 pm »
I wouldn't mind dating a bunch of chips.
Logged
 

Online Benta

  • Super Contributor
  • ***
  • Posts: 6031
  • Country: de
Re: Help Dating a Chip
« Reply #7 on: January 19, 2023, 11:41:31 pm »
Belgium's the place to go...
Logged
 

Offline bdunham7

  • Super Contributor
  • ***
  • Posts: 7972
  • Country: us
Re: Help Dating a Chip
« Reply #8 on: January 19, 2023, 11:45:33 pm »
Quote from: aargee on January 19, 2023, 10:00:13 pm
Tinder? Sorry, had to...

My first read was "Help dating a chap"...

so Grindr, I guess.
Logged
A 3.5 digit 4.5 digit 5 digit 5.5 digit 6.5 digit 7.5 digit DMM is good enough for most people.
 

Offline Nusa

  • Super Contributor
  • ***
  • Posts: 2417
  • Country: us
Re: Help Dating a Chip
« Reply #9 on: January 20, 2023, 12:17:02 am »
Quote from: NY2KW on January 19, 2023, 09:56:31 pm
I have searched the datasheets but none mention how dating is stamped on these ZeroPower SRAMs.

Is the manufacture date 1999 for both of these examples, or is one 2014 and the other (Attachment Link) " alt="" class="bbc_img" />2021?

Its an important distinction for estimating remaining litium battery life

Thank you in advance.

Jerry NY2KW

Last two lines:
99 = assembly site (Muar, Malaysia)
06S = lot code
VH = wafer fab (Carrollton, TX)
MYS = Malaysia
99 = test site (Muar)
YWW or YYWW = date code (single digit is 200Y)
A = die revision

Assuming they're both legit, of course, and not recycled and relabeled.
« Last Edit: January 20, 2023, 12:25:05 am by Nusa »
Logged
 
The following users thanked this post: edavid

Offline Alex Eisenhut

  • Super Contributor
  • ***
  • Posts: 3386
  • Country: ca
  • Place text here.
Re: Help Dating a Chip
« Reply #10 on: January 20, 2023, 03:34:48 am »
Logged
Hoarder of 8-bit Commodore relics and 1960s Tektronix 500-series stuff. Unconventional interior decorator.
 
The following users thanked this post: edavid

Offline Tomorokoshi

  • Super Contributor
  • ***
  • Posts: 1212
  • Country: us
Re: Help Dating a Chip
« Reply #11 on: January 20, 2023, 04:15:24 am »
Where did you get them from?
Logged
 
Pages: [1]   Go Up
« previous next »

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf

 


EEVblog Main Site EEVblog on Youtube EEVblog on Twitter EEVblog on Facebook EEVblog on Odysee