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Blank Eproms
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New (NOS) Bipolar PROMS for Sale

Bipolar PROMs are ONE-TIME programmable devices which are typically smaller, but faster than eproms. Obviously, since they can only be programmed once, all PROMs for sale are NEW.

Also, PROMs do not program like EPROMs so not all programmers will be able to program PROMs (Needham's for instance, can not program PROMs )

Lastly, many similar or compatible PROMs have different identifying chip numbers depending on the Manufacturer. For instance SIG 82s123, MMI 6331, IM5610 and NS 74S288 are all the same thing, but do NOT program the same way. In my listing descriptions, I use SIGNETICS as the refence chip (ie 82s123) since it is most widely recognized, but may actually sell a compatible chip instead.

PLEASE verfiy that your programmer can program the EXACT PROM type listed for sale. (I know Intersil [IM] chips are very hard to program, and very few programmmers can do them )

I can program any bipolar prom (...using the same cost structure as eproms) .

Volume price reductions are offered for quantities of 10 or more proms

As always if you have any questions please send me an email.


82s123 (32 x 8 Tri-State) bipolar Prom - $10.00
Actual (Compatible) Chip being sold is MMI 6331

X-refs are MMI 6331/63S081, TI 18S030, Harris 7603, AMD 27S19, NS 74S288, IM5610

82s126 (256 x 4 Open-Collector ) bipolar Prom - $10.00
Actual (Compatible) Chip being sold is MMI 6300

X-refs are MMI 6300/63S140, TI 24SA10, Harris 7610, AMD 27S20, NS 74S387

82s129 (256 x 4 Tri-Sate ) bipolar Prom - $10.00
Actual (Compatible) Chip being sold is Intersil 5623

X-refs are MMI 6301, TI 24S10, Harris 7611, AMD 27S21, NS 74S287, IM5623

82s131 (514 x 4 Tri-Sate ) bipolar Prom - $10.00
Actual (Compatible) Chip being sold is NS 74S571

X-refs are MMI 6306, Harris 7621, AMD 27S13, NS 74S571

82s137 (1024 x 4 Tri-Sate ) bipolar Prom - $10.00
Actual (Compatible) Chip being sold is NS 74S573

X-refs are MMI 6353, TI 24S41, Harris 7643, AMD 27S33, NS 74S476/74S573

82s141 (512 x 8 Tri-Sate, 0.6 DIP ) bipolar Prom - $12.00
Actual (Compatible) Chip being sold is NS 74S474

X-refs are MMI 6341, TI 28S46, Harris 7641, AMD 27S33, NS 74S474

82s147 (512 x 8 Tri-Sate, 0.3 DIP ) bipolar Prom - $10.00
Actual (Compatible) Chip being sold is MMI 6349

Used in games like DonkeyKong 3 and other games

X-refs are MMI 6349, TI 24S42, Harris 7649, AMD 27S29, NS 74S472

82s185 (2048 x 4 Tri-Sate, 0.6 DIP ) bipolar Prom - $12.00
Actual (Compatible) Chip being sold is Harris 7685

X-refs are MMI 63S841, TI 24S81, Harris 7685, AMD 27S185, NS 87S185

82s191 (2048 x 8 Tri-Sate, 0.6 DIP ) bipolar Prom - $15.00
Actual (Compatible) Chip being sold is Sig 82S191

X-refs are MMI 63S841, TI 28S81, Harris 7685, AMD 27S185, NS 87S185

82s321 (4096 x 8 Tri-Sate, 0.6 DIP ) bipolar Prom - $15.00
Actual (Compatible) Chip being sold is Sig 82S321

X-refs are MMI 63S3281, Harris 76321, AMD 27S321, NS 87S321

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