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The Signetics S82S181F is an 8-Kbit bipolar PROM organised as 1024×8 bits, with three-state outputs and four chip-enable inputs. The F package is a 24-pin ceramic DIP (CERDIP-24) for 5 V TTL systems.
The datasheet specifies an address access time of up to 90 ns for the S variant. Programming permanently opens internal fuse links; this is not a UV-erasable EPROM. Check the pinout and programmer support for this particular Signetics variant.
Condition: new old stock (NOS), blank (unprogrammed). On this PROM an unprogrammed cell reads 0, so a blank device reads 00h at every address. The photograph shows a chip from this lot, marked S82S181F, 8021B and 883C. The background was cleaned to white and marking contrast enhanced without changing the text.
Minimum order: 1 pc.
Signetics: Bipolar and MOS Memory 1977, 82S180/82S181, printed pages 126–129
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