The document describes a product released in November 2003. The product is a 256/128K x 36 memory array with dual-port memory cells, asynchronous operation, and byte controls.
The IDT70T651/9S provides two independent ports with separate control, address, and I/O pins for asynchronous read/write access. It features true dual‑port memory cells, rapid‑write mode, and on‑chip arbitration logic, supporting commercial speeds of 8‑15 ns and industrial speeds of 10‑12 ns.
The device is offered in 256‑ball BGA, 208‑pin PQFP and 208‑ball fpBGA packages, with industrial temperature range –40 °C to +85 °C (commercial 0 °C to +70 °C). Core voltage is 2.5 V, while I/O voltage can be selected as 2.5 V or 3.3 V via the OPT pins.
| Memory density | 256/128K × 36 bits |
|---|---|
| Core supply voltage | 2.5 V (+100 mV) |
| I/O supply voltage | Selectable 2.5 V or 3.3 V |
| Industrial access time | 10/12 ns (max) |
| Industrial temperature range | -40 °C to +85 °C |
| Commercial temperature range | 0 °C to +70 °C |
| Package options | 256‑ball BGA (BC‑256), 208‑pin PQFP (DR‑208), 208‑ball fpBGA (BF‑208) |
It is available in a 256‑ball BGA (BC‑256), a 208‑pin PQFP (DR‑208) and a 208‑ball fpBGA (BF‑208).