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 3.3V DIP32 EPROM ? Do you know one?		  Forum Locked
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MCU-Matt

7 Posts
Posted - 01/29/2011 :  16:11:09  Show Profile
Hi,

I have spend days searching for a DIP32 E/EPROM or FLASH that meets
the following specs:
3.3V, DIP32 / DIL32

Can you point me to one that actually can be purchased?

There is nothing in production that I can see. Almost all is 5V or
PLCC32 for 3.3V.

I have some NICs that use DIP32 for boot prom but are 3.3V - I have no idea why they would design it that way, but hey - what can you do.

Any recommendations welcome.

Matt
Byte me!
Edited by - MCU-Matt on 01/29/2011 16:38:12
Reply #1

ZLM

2945 Posts
Posted - 02/01/2011 :  11:41:52  Show Profile
the voltage should be controlled by programmer, not the adapter. If your chip is DIP chip, then you do not need the adapter.
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Reply #2

MCU-Matt

7 Posts
Posted - 02/15/2011 :  20:19:04  Show Profile
Sure for programming it is the programmer. But for normal operation it is for example the NIC controller (e.g. Realtec RTL8139C) which uses a 3.3V boot PROM/FLASH/EEPROM.

In cases like that the VCC is actually 3.3V not 5V. This becomes more and more common. And in one NIC I actually have a DIP EPROM socket that is 3.3V powered - escapes me why anyone would design it that way in the first place - maybe because the DIP sockets are cheaper than the PLCC.

The real problem here is that there are no DIP FLASH/PROM/EPROM/EEPROMs I could find.

Matt
Byte me!
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Reply #3

Bad_Ad84

210 Posts
Posted - 02/21/2011 :  01:57:52  Show Profile
If you have no luck, just buy the PLCC32 and use an adapter.

Something like:
hxxp://cgi.ebay.co.uk/PLCC32-PLCC-32-DIP32-Adapter-Universal-Xeltek-UP48-/360342965579?pt=LH_DefaultDomain_0&hash=item53e61d4d4b#ht_2688wt_1026
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Reply #4

Bad_Ad84

210 Posts
Posted - 03/07/2011 :  06:38:17  Show Profile
chip

120ns
AT49BV512-12PC
AT49BV512-12PI

150ns
AT49BV512-15PC
AT49BV512-15PI

32 pin dip, 3v 512kb

Found on a NIC I was just replacing and thought of this post.
Edited by - Bad_Ad84 on 03/07/2011 06:39:26
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