82S123

Philips Semiconductors 256-bit TTL bipolar PROM (32 x 8) Product specification 82S23/82S123 DESCRIPTION The 82S23 and 82S123 are field programmable, which means that custom patterns are immediately available by following the Signetics Generic I fusing procedure. The 82S23 and 82S123 devices are supplied with all outputs at logical Low. Outputs are programmed to a logic High level at any specified address by fusing the Ni-Cr link matrix. These devices include on-chip decoding and 1 Chip Enable input for memory expansion. They feature either Open Collector or 3-State outputs for optimization of word expansion in bused organizations. Ordering information can be found on the following page. The 82S23 and 82S123 devices are also processed to military requirements for operation over the military temperature range. For specifications and ordering information, consult the Signetics Military Data Handbook. FEATURES Address access time: 50ns max Power dissipation: 1.3mW/bit typ Input loading: –100µA max On-chip address decoding One Chip Enable input Output options: – N82S23: Open Collector – N82S123: 3-State No separate fusing pins Unprogrammed outputs are Low level Fully TTL compatible APPLICATIONS Prototyping/volume production Sequential controllers Format conversion Hardwired algorithms Random logic Code conversion PIN CONFIGURATIONS N Package O1 1 O2 2 O3 3 O4 4 O5 5 O6 6 O7 7 GND 8 16 VCC 15 CE 14 A4 13 A3 12 A2 11 A1 10 A0 9 O8 A Package O2 ...