Grex Hardware Conference

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Grex Hardware Item 58: IC = Integrated Circuits
Entered by rcurl on Sat Mar 5 06:14:43 UTC 1994:

For the exchange of information on Integrated Circuits.

12 responses total.

#1 of 12 by rcurl on Sat Mar 5 06:15:58 1994:

Is there an equivalent to the CMOS 4047? Is the 4528 and/or 4098
identical, except for being duals? (The Cookbook doesn't answer this.)

#2 of 12 by rcurl on Tue Aug 9 05:49:27 1994:

Well, let's try, what're the differences between the 4047 and the
CD4047AF, BD, BE, BF, and the 4047BM? Their prices range from $0.68 to
$9.68. (They are all CMOS monostable multivibrators.)

#3 of 12 by n8nxf on Tue Aug 9 11:46:51 1994:

Oh, things like package (plastic or ceramic), mil. spec., operating temp.
range, package style, unit to unit tolerance, that sort of thing.  The
more they have to fuss with it, special order, availability, etc, all
influance pricing.

#4 of 12 by rcurl on Wed Aug 10 05:25:25 1994:

Do you know more specifically what the letter codes denote with respect
to those variables? I'm sure I'll be able to use the $0.68 version, but
just out of curiosity...

#5 of 12 by n8nxf on Wed Aug 10 12:16:58 1994:

You can find this information by looking in a data book for the device.

#6 of 12 by rcurl on Wed Aug 10 16:44:57 1994:

Yes, I know, RTFM!  Guess I'll just stay ignorant.

#7 of 12 by n8nxf on Fri Aug 12 12:11:24 1994:

Perhaps someone else has this informatio at their fingertips.  It would
take me a good hour to look it up for you.

#8 of 12 by rcurl on Fri Aug 12 16:26:53 1994:

If you throw in the chip, I'll pay you $0.68  ;-).

#9 of 12 by mdw on Sun Aug 14 23:55:39 1994:

Those codes usually vary company by company - there's no uniform
standard.  About the only 2 standards I've seen is that 'P' usually
means a plastic case, and several digits on a memory chip is usually the
cycle time these days.

#10 of 12 by danr on Wed Aug 17 23:02:51 1994:

Oddly enough, I happen to have quite handy the RCA CMOS data book.
The BD and BF parts are 14-pin ceramic packages, the BE is a plastic
package. The databook does not list a BM part.  My suggestion would be
to go with the cheapest part with a B  suffix. I think the A parts are
less static-resistant than the B parts.
..

#11 of 12 by rcurl on Thu Aug 18 05:13:01 1994:

Thanks, Dan. The prices are 4047 .69; AF 4.52; BD 9.68; BE .70; 
BF 2.77; BM .69, This fits with the ceramics, but the AF must be
better than the BF in some respect. Are the packages (# pins)
different?

#12 of 12 by danr on Wed Aug 31 02:46:11 1994:

Not necessarily.  The AF might be more scarce, meaning they can 
get a higher price for it.

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