AMD AM27S25DC AM27S25 27S25 4096-Bit Bipolar PROM 24 PIN CERAMIC IC Rare

IM5610CPE Intersil Blank 256 Bit Bipolar prom = N82S123, AM27S19, never used.

N82S123N Signetics/Philips PROM 256-bit TTL bipolar PROM 32 x 8 IC New

Service programming bipolar PROM chips with your own data.

JRC Muses 8820 - DIP 8 IC High Quality Bipolar-Input Audio Operational Amplifier

AMD AM27S25APC Bipolar PROM Memory IC (DIP-24)

AMD - AM27S31DC - BiPolar PROM - 1pc****

2pc AM27S13APC AMD IC PROM 512x4 55ns