Features of 256Mb: x4, x8, x16 SDRAM
The 256Mb SDRAM is a high‑speed CMOS synchronous DRAM offered in three data‑bus widths (x4, x8, x16). It provides fully registered signals, internal pipelined operation, programmable burst lengths (1, 2, 4, 8, or full page), auto‑precharge, and self‑refresh modes. The device operates from a single +3.3 V supply and supports both commercial (0 °C to +70 °C) and industrial (40 °C to +85 °C) temperature ranges.
The memory is available in several package types, including 54‑pin TSOP II, 60‑ball FBGA, and 54‑ball VFBGA. Timing specifications cover frequencies up to 167 MHz (‑6A) with CL = 2 or 3, and the part numbers are listed for each configuration (e.g., MT48LC64M4A2TG, MT48LC32M8A2TG, MT48LC16M16A2TG).
| Capacity | 256 Mb |
|---|---|
| Data‑bus width | x4, x8, x16 |
| Supply voltage | +3.3 V |
| Operating temperature (commercial) | 0 °C to +70 °C |
| Operating temperature (industrial) | 40 °C to +85 °C |
| Maximum frequency (‑6A) | 167 MHz |
| CAS latency options | CL = 2, CL = 3 |
| Refresh count | 8 K cycles |
| Burst length options | 1, 2, 4, 8, full page |
It operates from a single +3.3 V power supply.
Commercial range is 0 °C to +70 °C and industrial range is 40 °C to +85 °C.
Burst lengths of 1, 2, 4, 8, or a full page can be selected.