Looking for datasheet for Toshiba D455C and D546C391

[Koko]

Hi, I'm looking for datasheets for a Toshiba d455c and D546c391 found on a
20-year old board. Does anyone have any information about these or know
where I should look? Thanks in advance for any help you can give.

 

[Franc Zabkar]

On Tue, 22 Feb 2005 05:37:46 GMT, "Koko" <a@b.c> put finger to
keyboard and composed:

Hi, I'm looking for datasheets for a Toshiba d455c and D546c391 found on a
20-year old board. Does anyone have any information about these or know
where I should look? Thanks in advance for any help you can give.

Try uPD455C (is there one digit missing?) or CD4555??? The second one
could be a uPD546C. Is it a 40-pin CPU or microcontroller? If so, then
I suspect it is ROMed - the 391 suffix would be the firmware ID.

BTW, are you sure these are Toshiba chips and not NEC?

Just in case the first number was a typo:
http://www.ee.washington.edu/stores/DataSheets/cd4000/cd4555.pdf


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

 

[Patrick Cheung - townt.co]

HI !

Why not try the following link ?

http://www.toshiba.com/taec/cgi-bin/master_search.cgi

--
Patrick Cheung
Sales Department
Town Target Technology Limited
Address : 1805-7, Wu Sang House, 655 Nathan Road, Mongkok,
Kowloon, Hong Kong
Tel : 2505-5838 Fax : 2505-8121
E-mail : patrick.cheung@towntarget.com.hk
Web-site : http://www.townt.com/towne/ or www.towntarget.com.hk



"Koko" <a@b.c> źśźgŠóślĽóˇsťD:KyzSd.463852$8l.207319@pd7tw1no...

Hi, I'm looking for datasheets for a Toshiba d455c and D546c391 found on a
20-year old board. Does anyone have any information about these or know
where I should look? Thanks in advance for any help you can give.

 

[Koko]

Franc,
I'm posting on behalf of a friend who doesn't speak English well enough to
have confidence to post. I kind of thought it might be NEC, too. I'll get
back to you soon. Thank you!


"Franc Zabkar" <fzabkar@optussnet.com.au> wrote in message
news:smil115hfomicmiada0j01dbcccmmm25me@4ax.com...

On Tue, 22 Feb 2005 05:37:46 GMT, "Koko" <a@b.c> put finger to
keyboard and composed:

Hi, I'm looking for datasheets for a Toshiba d455c and D546c391 found on a
20-year old board. Does anyone have any information about these or know
where I should look? Thanks in advance for any help you can give.

Try uPD455C (is there one digit missing?) or CD4555??? The second one
could be a uPD546C. Is it a 40-pin CPU or microcontroller? If so, then
I suspect it is ROMed - the 391 suffix would be the firmware ID.

BTW, are you sure these are Toshiba chips and not NEC?

Just in case the first number was a typo:
http://www.ee.washington.edu/stores/DataSheets/cd4000/cd4555.pdf


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.