| Hitachi RAM chip marking |
| Hitachi |
www.halsp.hitachi.com
Merged with NEC's RAM division to new
Elpida - www.elpida.com |
| HM5 |
HM5 - Hitachi |
| W - voltage |
[none] - 5.0V
W - 3.3V low voltage |
| 4 - memory density |
1 - 16MBit
4 - 4MBit |
| 2 - refresh |
2 - 512
4 - 1024
8 - 1024 |
| 26 - bit organization |
4MBit:
26 - 256K x 16
40 - 1M x 4
80 - 512K x 8
|
16MBit:
10 - 16M x 1
16 - 1M x 16
40 - 4M x 4
80 - 2M x 8 |
| 5 - RAM type |
0 - DRAM FastPage
5 - DRAM EDO
6 - DRAM |
| J - package option |
J - SOJ
FP - QFP
? - TSOP |
| 6 - min cycle time |
5 - 50ns
6 - 60ns
7 - 70ns
10 - ? |
| 9705 - date of manufacture |
97 - year of manufacture
05 - week of manufacture |
| 7SS - die revision |
A/B/C ... |
| C268 - Serialization code |
? |
