15 Jun
2009
15 Jun
'09
10:31 a.m.
I think it is highly unlikely that the Vcc in his circuit is anything but 5
VDC. The designer would have to be a real dumbass to do otherwise....
Besides, it's easy enough to measure and remove all doubt... I recommended a
27C16 not a 2716 ( and yes I know the Vcc is the same ).
Best regards, Steven
----- Original Message -----
From: "Chuck Guzis" <cclist at sydex.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Sunday, June 14, 2009 4:50 PM
Subject: Re: Intersil EPROM
On 14 Jun 2009 at 16:27, Scanning wrote:
If it is to fix the equipment, I would suggest
using a 27C16 and make
the necessary pin adjustments in a homemade carrier ( two 24 pin
sockets plugged into each other with the necessary pinout adjustments,
i.e. unnecessary address pins tied to ground, etc... ). Looks like a
standard JEDEC pinout.
Can one operate a 2716 with +10 volts for Vcc? The datasheet seems
to say that the limit for Vcc on the Inmos part is +11v/(10v
nominal).
This is really odd as I was cleaning out some stuff the other day and
I came across three big 3-ring binders from about 1990 titled "The
Modern IC Databook" from WEKA. It was a subscription service where
updates would be sent out monthly and you'd go through the hell of
"Remove page A-324 and substitute pages A-324 and A324a..."
Included was a service for reseraching unknown ICs--just give them a
call and get a FAX a few days later.
At any rate, I was leafing through the "Memory" section and came
across the aforementioned CMOS EPROMs. My reaction was "Why, in
1991, would anyone even care about such antiquated parts?" I guess
Will answered that one.
--Chuck