Intersil's X28C512, X28C513 are 64K x 8 EEPROMs fabricated with Intersil's proprietary, high performance, floating gate CMOS technology. They feature the JEDEC approved pin out for byte wide memories, compatible with industry standard EPROMS. The X28C512, X28C513 support a 128-byte page write operation, effectively providing a 39µs/byte write cycle and enabling the entire memory to be written in less than 2.5 seconds. The X28C512, X28C513 also feature DATA Polling and Toggle Bit Polling, system software support schemes used to indicate the early completion of a write cycle. In addition, the X28C512, X28C513 support the software data protection option.
The X28C512 and X28C513 EEPROMs provide 64 K × 8 bits of non‑volatile memory, operating at a single 5 V supply. They support both byte‑write and 128‑byte page‑write modes, allowing the entire memory to be programmed in less than 2.5 seconds. Features include DATA polling, Toggle‑Bit polling, and optional software data protection to detect write completion and prevent inadvertent writes.
The devices are offered in multiple package types (PLCC, LCC, CERDIP, CPGA) with a JEDEC‑approved pinout. Electrical specifications such as 90 ns access time, 50 mA active current, 500 nA standby current, 100 k write‑cycle endurance and 100‑year data retention are listed. Hardware protection mechanisms (noise protection, Vgc sense, write‑inhibit) and a software‑controlled protection mode are also described.
| Access Time | 90 ns |
|---|---|
| Supply Voltage | 5 V |
| Active Current | 50 mA |
| Standby Current | 500 nA |
| Endurance | 100,000 write cycles |
| Data Retention | 100 years |
The access time is 90 ns.
They are rated for 100,000 write cycles.