| Access Mode | FAST PAGE |
| Access Time-Max | 70 ns |
| Additional Feature | RAS ONLY; CAS BEFORE RAS REFRESH |
| JESD-30 Code | R-PDSO-J40 |
| Length | 25.8 mm |
| Manufacturer | Hitachi Ltd |
| Manufacturer Part Number | HM514280AJ-7 |
| Memory Density | 4.7186 Mbit |
| Memory IC Type | FAST PAGE DRAM |
| Memory Width | 18 |
| Number of Functions, Number of Ports | 1 |
| Number of Terminals | 40 |
| Number of Words | 262.144 k |
| Number of Words Code | 256000 |
| Operating Mode | ASYNCHRONOUS |
| Operating Temperature-Max | 70 ?C |
| Operating Temperature-Min | 0 ?C |
| Organization | 256KX18 |
| Output Characteristics | 3-STATE |
| Package Body Material | PLASTIC/EPOXY |
| Package Code | SOJ |