| OKI Electronic RAM chip marking |
| OKI Electronic |
www.okisemi.com |
| MSM / M |
MSM - Oki Electronic
M - Oki Electronic |
| 51 - RAM type |
41 - ?
51 - ? |
| V - voltage |
V - 3.3V
[none] - 5.0V |
| 1 - memory density |
1 - 1MBit ?
4 - 4MBit
8 - 8MBit
16 - 16MBit ? |
| 7 - refresh |
8 - 1K refresh
7 - 2K refresh
6 - 4K refresh |
| 26 - bit organization |
4MBit:
10 - 4MBit x 1
26 - 256kBit x 16
40 - 1MBit x 4
80 - 512kBit x 8
90 - 512kBit x 9 |
16MBit
10 - 16MBit x 1
16 - 1MBit x 16
40 - 4MBit x 4
80 - 2MBit x 8
|
| 0 - RAM type |
0 - Fast Page
5 - EDO |
| 10 - min cycle time |
10 - 100ns
60 - 60ns
70 - 70ns |
| J - package option |
J - SOJ
TS - TSOP
C - ? |
| B - die revision |
A/B/C ... |
| 9812 - date of manufacture |
98 - year of manufacture
12 - week of manufacture |
| B2124 - Serialization code |
? |
