ToToTEK.COM Forum Index ToToTEK.COM
Help & Support Forum
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

If you find any SPAM or any problem from the forum, please PM Tomy. Thanks.


WANTED RAM for Double Pro Fighter

 
Post new topic   Reply to topic    ToToTEK.COM Forum Index -> Copiers and Hardware
View previous topic :: View next topic  
Author Message
ackman



Joined: 01 Mar 2019
Posts: 4

PostPosted: Sun Mar 10, 2019 7:18 pm    Post subject: WANTED RAM for Double Pro Fighter Reply with quote

Hi.

I have a Double Pro Fighter 24M version (working), but I would like to expand the memory up to 32 MB.

Anybody knows where to buy two pieces like the one attached?



35016DD0-0CC2-4670-96DD-B9E41279EFE7.jpeg
 Description:
Memory chip
 Filesize:  247.07 KB
 Viewed:  1040 Time(s)

35016DD0-0CC2-4670-96DD-B9E41279EFE7.jpeg


Back to top
View user's profile Send private message
DoctorBackup



Joined: 14 Aug 2005
Posts: 265

PostPosted: Mon Mar 11, 2019 8:32 am    Post subject: Reply with quote

You'll have to build it or find a defective one that the ram still works
Back to top
View user's profile Send private message
ackman



Joined: 01 Mar 2019
Posts: 4

PostPosted: Mon Mar 11, 2019 10:30 am    Post subject: Reply with quote

DoctorBackup wrote:
You'll have to build it or find a defective one that the ram still works


Thank you for your response.
How can I build one of those? I suppose the specs must be the same...


EDIT: I could find almost the same model (UPD424800-70 instead of UPD424800-70L)
https://www.ebay.com/itm/10-Pieces-UPD424800-70-New-Integrated-Circuit-new-Original-NEC/163558305838?hash=item2614d5b02e:g:jIQAAOSw-09aKCV5&frcectupt=true

Anybody knows if I can use 2 of them with my 6 existing UPD424800-70L?

Regards.
Back to top
View user's profile Send private message
Mystic_Merlin



Joined: 15 Oct 2007
Posts: 400
Location: Bangkok

PostPosted: Wed Mar 13, 2019 9:48 am    Post subject: Reply with quote

I expanded my DPF to 32M with some of those also bought on ebay a while ago.

As long as it's Fast Page 512KBx8Bit no worries
Back to top
View user's profile Send private message
ackman



Joined: 01 Mar 2019
Posts: 4

PostPosted: Wed Mar 13, 2019 10:43 am    Post subject: Reply with quote

Mystic_Merlin wrote:
I expanded my DPF to 32M with some of those also bought on ebay a while ago.

As long as it's Fast Page 512KBx8Bit no worries


I found the datasheet for UPD424800-70L:
https://datasheet.datasheetarchive.com/originals/scans/Scans-95/DSAIHSC00039854.pdf

And this is the datasheet for UPD424800-70:
https://datasheet.datasheetarchive.com/originals/scans/Scans-95/DSAIHSC00039881.pdf

Both Fast-page and 512KBx8Bit. I think the only difference to get the "L" is the power consumption in stand-by mode (5,5 mW versus 1,1 mW for the "L" version).

I'm in contact with Renesas (new owners of NEC ICs division) to confirm this. But anyway, your comment made me feel confident to buy some of those and expand.

Just place on the board and weld, I suppose.

Regards
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    ToToTEK.COM Forum Index -> Copiers and Hardware All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2011 phpBB Group