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CPU Shack: Old and unusual ALUs - Offers Accepted
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CPUShack



Joined: 16 Jun 2003
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Location: State of Jefferson, USA
PostPosted: Sun Aug 06, 2017 3:28 pm    Post subject: CPU Shack: Old and unusual ALUs - Offers Accepted Reply with quote
The '582 BCD ALU is one I had not known about before, it operates on 4-bit BCD (Binary Coded Decimal) data specifically. A bit different than the standard 181s.


1x TI SN74181J Original 4-bit TTL ALU Ceramic Very early 1971 Dates $5
SOLD OUTx TI SN74181N Original 4-bit TTL ALU Early 71-72 Date $5
3x Fairchild 74F582PC New Old stock 4-bit BCD ALU $4
3x IDT 7381L25J 4x 381 -4-bot (so 16-bit) ALUs on one chip New Old Stock New Logo $5 - Reduced to $4
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Last edited by CPUShack on Mon Aug 14, 2017 1:55 pm; edited 7 times in total
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xhoba



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PostPosted: Sun Aug 06, 2017 3:38 pm    Post subject: Reply with quote
1x TI SN74181J Original 4-bit TTL ALU Ceramic Very early 1971 Dates $5
1x TI SN74181N Original 4-bit TTL ALU Early 71-72 Date $5
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gmilliorn



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PostPosted: Sun Aug 06, 2017 5:01 pm    Post subject: Reply with quote
1x Fairchild 74F582PC New Old stock 4-bit BCD ALU

What price?
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magictom



Joined: 14 May 2009
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PostPosted: Sun Aug 06, 2017 6:44 pm    Post subject: Reply with quote
1x Fairchild 74F582PC New Old stock 4-bit BCD ALU
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yk



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PostPosted: Mon Aug 07, 2017 8:37 am    Post subject: Reply with quote
TI SN74181J Original 4-bit TTL ALU Ceramic Very early 1971 Dates $5
SN74181J ? 4pcs, thanks!
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Andreycpu



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PostPosted: Mon Aug 07, 2017 10:13 am    Post subject: Reply with quote
TI SN74181J Original 4-bit TTL ALU Ceramic Very early 1971 Dates $5
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CPUShack



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PostPosted: Mon Aug 07, 2017 11:46 am    Post subject: Reply with quote
gmilliorn wrote:
1x Fairchild 74F582PC New Old stock 4-bit BCD ALU

What price?


$4 lol sorry I missed that

Updated
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Vegeta



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PostPosted: Mon Aug 07, 2017 12:06 pm    Post subject: Reply with quote
1x TI SN74181J Original 4-bit TTL ALU Ceramic Very early 1971 Dates $5
1x TI SN74181N Original 4-bit TTL ALU Early 71-72 Date $5
1x Fairchild 74F582PC New Old stock 4-bit BCD ALU $4
if possible
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stamasd



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PostPosted: Mon Aug 07, 2017 4:49 pm    Post subject: Reply with quote
1x IDT 7381L25J 4x 381 -4-bot (so 16-bit) ALUs on one chip New Old Stock New Logo $5 - Reduced to $4
If you find any IDT 7383, I'm interested.

1x Fairchild 74F582PC New Old stock 4-bit BCD ALU $4
Interesting how it breaks with naming conventions where x81 is the ALU and x82 is the lookahead carry generator in previous series.
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CPUShack



Joined: 16 Jun 2003
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PostPosted: Mon Aug 07, 2017 5:16 pm    Post subject: Reply with quote
stamasd wrote:
1x IDT 7381L25J 4x 381 -4-bot (so 16-bit) ALUs on one chip New Old Stock New Logo $5 - Reduced to $4
If you find any IDT 7383, I'm interested.

1x Fairchild 74F582PC New Old stock 4-bit BCD ALU $4
Interesting how it breaks with naming conventions where x81 is the ALU and x82 is the lookahead carry generator in previous series.


Even more fun, is the Signetics 74F582 is an Octal buffer LOL (as is the Signetics 74F581)

So Fairchild used an existing part number LOL
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stamasd



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PostPosted: Tue Aug 08, 2017 6:08 am    Post subject: Reply with quote
CPUShack wrote:

Even more fun, is the Signetics 74F582 is an Octal buffer LOL (as is the Signetics 74F581)

So Fairchild used an existing part number LOL


Hmm, the 1987 Signetics data book has the 74F582 as 4-bit BCD ALU (same as the Fairchild above) and there's no 581 listed. http://bitsavers.trailing-edge.com/pdf/signetics/_dataBooks/1987_FAST_Data_Manual.pdf
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CPUShack



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PostPosted: Tue Aug 08, 2017 12:47 pm    Post subject: Reply with quote
stamasd wrote:
CPUShack wrote:

Even more fun, is the Signetics 74F582 is an Octal buffer LOL (as is the Signetics 74F581)

So Fairchild used an existing part number LOL


Hmm, the 1987 Signetics data book has the 74F582 as 4-bit BCD ALU (same as the Fairchild above) and there's no 581 listed. http://bitsavers.trailing-edge.com/pdf/signetics/_dataBooks/1987_FAST_Data_Manual.pdf


Maybe they changed it later?

This is from the 1983 IC Master
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stamasd



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PostPosted: Tue Aug 08, 2017 1:05 pm    Post subject: Reply with quote
Yeah, I saw that in IC-master too. I guess IC-master got it wrong. I would believe the manufacturer's catalog more.
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CPUShack



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PostPosted: Tue Aug 08, 2017 1:12 pm    Post subject: Reply with quote
haha yah entirely possible
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CPUShack



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PostPosted: Wed Aug 09, 2017 12:31 pm    Post subject: Reply with quote
Offers Accepted
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